^全^ 获取SQL SERVER2000/2005、MySql、Oracle元数据的SQL语句 [SQL语句来自CodeSmith]

前言

     前段时间老赵发了一篇关于和谐社区，和谐技术：微软的宠儿们，为什么富人的孩子就不能早当家？引发的争论至今令我诚惶诚恐，说得很在理！！这篇文章本打算放首页的，但是由于是拿来主义，我认为这属于新手的典型特征之一(本来就是新手=_=)，故老老实实的放新手区吧。心里比较踏实一点，即使看到的人不多也没关系，自己做个笔记 :)

     有很多朋友都比较关心代码自动生成，理所当然离不开元数据了，但是对于获取元数据的方法不一。由于最近我也在写代码生成，对元数据的获取SQL语句并不齐全，意外的想到了CodeSmith，它也可以根据元数据来生成三层的，于是乎习惯性的去找他的源码了，果然没有失望，我们在SchemaProviders目录下能看到如下文件：

SchemaExplorer.ADOXSchemaProvider.dll

SchemaExplorer.MySQLSchemaProvider.dll

SchemaExplorer.OracleSchemaProvider.dll

SchemaExplorer.SqlSchemaProvider.dll

没有加密！但是SchemaExplorer.SqlSchemaProvider.dll混淆了！用Reflector查看源代码仍然能看到SQL语句，于是乎拷贝出来，替换\t\n，弄了我两个小时才完，今天一搜，原来有源码- - ！！超级郁闷！！大伙就别走我的弯路了吧！源码在Samples\Projects\目录下。下面开始Ctrl+C，然后Ctrl+V，贴上来给没有下载CodeSmith的朋友收藏一下吧:)

版本

     CodeSmithProfessional 4.1

正文

     1.     闲话少说，直接贴SQL2000/2005获取元数据的SQL语句了，大家一看就会明白的。

#region SQL Templates
        private const string SQL_GetDatabaseName = "SELECT db_name()";

        private const string SQL2005_GetTables = @"
          SELECT
              object_name(so.id) AS OBJECT_NAME,
              schema_name(so.uid) AS USER_NAME,
              so.type AS TYPE,
              so.crdate AS DATE_CREATED,
              fg.file_group AS FILE_GROUP,
              so.id as OBJECT_ID
          FROM 
              dbo.sysobjects so
          LEFT JOIN (
              SELECT 
                  s.groupname AS file_group,
                  i.id        AS id
              FROM dbo.sysfilegroups s
              INNER JOIN dbo.sysindexes i
                  ON i.groupid = s.groupid 
              WHERE i.indid < 2                           
          ) AS fg
              ON so.id = fg.id
          WHERE
              so.type = N'U'
              AND permissions(so.id) & 4096 <> 0
              AND ObjectProperty(so.id, N'IsMSShipped') = 0
              AND NOT EXISTS (SELECT * FROM sys.extended_properties WHERE major_id = so.id AND name = 'microsoft_database_tools_support' AND value = 1)
          ORDER BY schema_name(so.uid), object_name(so.id)";

        private const string SQL2000_GetTables = @"
          SELECT
              object_name(so.id) AS OBJECT_NAME,
              user_name(so.uid)  AS USER_NAME,
              so.type            AS TYPE,
              so.crdate          AS DATE_CREATED,
              fg.file_group      AS FILE_GROUP,
              so.id              AS OBJECT_ID
          FROM 
              dbo.sysobjects so
          LEFT JOIN (
                SELECT 
                    s.groupname AS file_group,
                    i.id        AS id
                FROM dbo.sysfilegroups s
                INNER JOIN dbo.sysindexes i
                    ON i.groupid = s.groupid 
                WHERE i.indid < 2                           
              ) AS fg
              ON so.id = fg.id
          WHERE
              so.type = N'U'
              AND permissions(so.id) & 4096 <> 0
              AND ObjectProperty(so.id, N'IsMSShipped') = 0
          ORDER BY user_name(so.uid), object_name(so.id)";

        private const string SQL_GetTables = @"
            SELECT
              object_name(id) AS OBJECT_NAME,
              user_name(uid) AS USER_NAME,
              type AS TYPE,
              crdate AS DATE_CREATED,
              '' AS FILE_GROUP,
              id as OBJECT_ID
            FROM
              sysobjects
            WHERE
              type = N'U'
              AND permissions(id) & 4096 <> 0
              AND ObjectProperty(id, N'IsMSShipped') = 0
            ORDER BY user_name(uid), object_name(id)";

        private const string SQL2005_GetTableColumns = @"
             SELECT
              clmns.[name] AS [Name],
              usrt.[name] AS [DataType],
              ISNULL(baset.[name], N'') AS [SystemType],
              CAST(CASE WHEN baset.[name] IN (N'char', N'varchar', N'binary', N'varbinary', N'nchar', N'nvarchar') THEN clmns.prec ELSE clmns.length END AS int) AS [Length],
              CAST(clmns.xprec AS tinyint) AS [NumericPrecision],
              CAST(clmns.xscale AS int) AS [NumericScale],
              CASE CAST(clmns.isnullable AS bit) WHEN 1 THEN 'YES' ELSE 'NO' END AS [Nullable],
              defaults.text AS [DefaultValue],
              CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsIdentity') AS int) AS [Identity],
              CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsRowGuidCol') AS int) AS IsRowGuid,
              CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsComputed') AS int) AS IsComputed,
              CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsDeterministic') AS int) AS IsDeterministic,
              CAST(CASE COLUMNPROPERTY(clmns.id, clmns.[name], N'IsIdentity') WHEN 1 THEN IDENT_SEED(QUOTENAME(SCHEMA_NAME(tbl.uid)) + '.' + QUOTENAME(tbl.[name])) ELSE 0 END AS nvarchar(40)) AS [IdentitySeed],
              CAST(CASE COLUMNPROPERTY(clmns.id, clmns.[name], N'IsIdentity') WHEN 1 THEN IDENT_INCR(QUOTENAME(SCHEMA_NAME(tbl.uid)) + '.' + QUOTENAME(tbl.[name])) ELSE 0 END AS nvarchar(40)) AS [IdentityIncrement],
              cdef.[text] AS ComputedDefinition,
              clmns.[collation] AS Collation,
              CAST(clmns.colid AS int) AS ObjectId
            FROM
              dbo.sysobjects AS tbl
              INNER JOIN dbo.syscolumns AS clmns ON clmns.id=tbl.id
              LEFT JOIN dbo.systypes AS usrt ON usrt.xusertype = clmns.xusertype
              LEFT JOIN dbo.sysusers AS sclmns ON sclmns.uid = usrt.uid
              LEFT JOIN dbo.systypes AS baset ON baset.xusertype = clmns.xtype and baset.xusertype = baset.xtype
              LEFT JOIN dbo.syscomments AS defaults ON defaults.id = clmns.cdefault
              LEFT JOIN dbo.syscomments AS cdef ON cdef.id = clmns.id AND cdef.number = clmns.colid
            WHERE
              (tbl.[type] = 'U' OR tbl.[type] = 'S')
              AND SCHEMA_NAME(tbl.uid) = @SchemaName
              AND tbl.[name] = @TableName
            ORDER BY
              clmns.colorder";

        private const string SQL2000_GetTableColumns = @"
              SELECT
                clmns.[name] AS [Name],
                usrt.[name] AS [DataType],
                ISNULL(baset.[name], N'') AS [SystemType],
                CAST(CASE WHEN baset.[name] IN (N'char', N'varchar', N'binary', N'varbinary', N'nchar', N'nvarchar') THEN clmns.prec ELSE clmns.length END AS INT) AS [Length],
                CAST(clmns.xprec AS TINYINT) AS [NumericPrecision],
                CAST(clmns.xscale AS INT) AS [NumericScale],
                CASE CAST(clmns.isnullable AS BIT) WHEN 1 THEN 'YES' ELSE 'NO' END AS [Nullable],
                defaults.text AS [DefaultValue],
                CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsIdentity') AS INT) AS [Identity],
                CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsRowGuidCol') AS INT) AS IsRowGuid,
                CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsComputed') AS INT) AS IsComputed,
                CAST(COLUMNPROPERTY(clmns.id, clmns.[name], N'IsDeterministic') AS INT) AS IsDeterministic,
                CAST(CASE COLUMNPROPERTY(clmns.id, clmns.[name], N'IsIdentity') WHEN 1 THEN IDENT_SEED(QUOTENAME(stbl.[name]) + '.' + QUOTENAME(tbl.[name])) ELSE 0 END AS NVARCHAR(40)) AS [IdentitySeed],
                CAST(CASE COLUMNPROPERTY(clmns.id, clmns.[name], N'IsIdentity') WHEN 1 THEN IDENT_INCR(QUOTENAME(stbl.[name]) + '.' + QUOTENAME(tbl.[name])) ELSE 0 END AS NVARCHAR(40)) AS [IdentityIncrement],
                cdef.[text] AS ComputedDefinition,
                clmns.[collation] AS Collation,
                CAST(clmns.colid AS int) AS ObjectId
              FROM
                dbo.sysobjects AS tbl
                INNER JOIN dbo.sysusers AS stbl ON stbl.[uid] = tbl.[uid]
                INNER JOIN dbo.syscolumns AS clmns ON clmns.id=tbl.id
                LEFT JOIN dbo.systypes AS usrt ON usrt.xusertype = clmns.xusertype
                LEFT JOIN dbo.sysusers AS sclmns ON sclmns.uid = usrt.uid
                LEFT JOIN dbo.systypes AS baset ON baset.xusertype = clmns.xtype and baset.xusertype = baset.xtype
                LEFT JOIN dbo.syscomments AS defaults ON defaults.id = clmns.cdefault
                LEFT JOIN dbo.syscomments AS cdef ON cdef.id = clmns.id AND cdef.number = clmns.colid
              WHERE
                (tbl.[type] = 'U' OR tbl.[type] = 'S') 
                AND stbl.[name] = @SchemaName
                AND tbl.[name] = @TableName
              ORDER BY
                  clmns.colorder";

        private const string SQL_GetTableColumns = @"
                  SELECT
                      cols.COLUMN_NAME,
                      CASE
                          WHEN cols.DOMAIN_NAME IS NOT NULL THEN cols.DOMAIN_NAME
                          ELSE cols.DATA_TYPE
                      END
                      AS DATA_TYPE,
                      cols.DATA_TYPE AS UNDERLYING_TYPE,
                      CAST(cols.CHARACTER_MAXIMUM_LENGTH AS int),
                      cols.NUMERIC_PRECISION,
                      cols.NUMERIC_SCALE,
                      cols.IS_NULLABLE,
                      cols.COLUMN_DEFAULT,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']'),cols.COLUMN_NAME,'IsIdentity') AS IS_IDENTITY,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']'),cols.COLUMN_NAME,'IsRowGuidCol') AS IS_ROW_GUID_COL,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']'),cols.COLUMN_NAME,'IsComputed') AS IS_COMPUTED,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']'),cols.COLUMN_NAME,'IsDeterministic') AS IS_DETERMINISTIC,
                      CASE WHEN (COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']'), cols.COLUMN_NAME, N'IsIdentity') <> 0) then CONVERT(nvarchar(40), ident_seed(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']')) else null end AS IDENTITY_SEED,
                      CASE WHEN (COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']'), cols.COLUMN_NAME, N'IsIdentity') <> 0) then CONVERT(nvarchar(40), ident_incr(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @TableName + N']')) else null end AS IDENTITY_INCREMENT,
                    NULL AS COMPUTED_DEFINITION,
                    NULL AS [collation],
                    CAST(0 AS int) AS ObjectId
                  FROM
                      INFORMATION_SCHEMA.COLUMNS cols
                  WHERE
                      cols.TABLE_CATALOG = @DatabaseName
                      AND cols.TABLE_SCHEMA = @OwnerName
                      AND cols.TABLE_NAME = @TableName
                  ORDER BY
                      cols.ORDINAL_POSITION";

        private const string SQL2005_GetViews = @"
                  SELECT
                      object_name(id) AS OBJECT_NAME,
                      schema_name(uid) AS USER_NAME,
                      type AS TYPE,
                      crdate AS DATE_CREATED,
                      id as OBJECT_ID
                  FROM
                      sysobjects
                  WHERE
                      type = N'V'
                      AND permissions(id) & 4096 <> 0
                      AND ObjectProperty(id, N'IsMSShipped') = 0
                      AND NOT EXISTS (SELECT * FROM sys.extended_properties WHERE major_id = id AND name = 'microsoft_database_tools_support' AND value = 1)
                  ORDER BY object_name(id)";

        private const string SQL_GetViews = @"
                  SELECT
                      object_name(id) AS OBJECT_NAME,
                      user_name(uid) AS USER_NAME,
                      type AS TYPE,
                      crdate AS DATE_CREATED,
                      id as OBJECT_ID
                  FROM
                      sysobjects
                  WHERE
                      type = N'V'
                      AND permissions(id) & 4096 <> 0
                      AND ObjectProperty(id, N'IsMSShipped') = 0
          ORDER BY object_name(id)";

        private const string SQL2000_GetViewColumns = @"
                  SELECT
                      cols.COLUMN_NAME,
                      CASE
                          WHEN cols.DOMAIN_NAME IS NOT NULL THEN cols.DOMAIN_NAME COLLATE Latin1_General_BIN
                          ELSE cols.DATA_TYPE
                      END
                      AS DATA_TYPE,
                      cols.DATA_TYPE AS UNDERLYING_TYPE,
                      CAST(cols.CHARACTER_MAXIMUM_LENGTH AS int),
                      cols.NUMERIC_PRECISION,
                      cols.NUMERIC_SCALE,
                      cols.IS_NULLABLE,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @ViewName + N']'),cols.COLUMN_NAME,'IsComputed') AS IS_COMPUTED,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @ViewName + N']'),cols.COLUMN_NAME,'IsDeterministic') AS IS_DETERMINISTIC
                  FROM
                      INFORMATION_SCHEMA.COLUMNS cols
                  WHERE
                      cols.TABLE_CATALOG = @DatabaseName
                      AND cols.TABLE_SCHEMA = @OwnerName
                      AND cols.TABLE_NAME = @ViewName
                  ORDER BY
                      cols.ORDINAL_POSITION";

        private const string SQL_GetViewColumns = @"
                  SELECT
                      cols.COLUMN_NAME,
                      CASE
                          WHEN cols.DOMAIN_NAME IS NOT NULL THEN cols.DOMAIN_NAME
                          ELSE cols.DATA_TYPE
                      END
                      AS DATA_TYPE,
                      cols.DATA_TYPE AS UNDERLYING_TYPE,
                      CAST(cols.CHARACTER_MAXIMUM_LENGTH AS int),
                      cols.NUMERIC_PRECISION,
                      cols.NUMERIC_SCALE,
                      cols.IS_NULLABLE,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @ViewName + N']'),cols.COLUMN_NAME,'IsComputed') AS IS_COMPUTED,
                      COLUMNPROPERTY(OBJECT_ID(N'[' + @DatabaseName + N'].[' + @OwnerName + N'].[' + @ViewName + N']'),cols.COLUMN_NAME,'IsDeterministic') AS IS_DETERMINISTIC
                  FROM
                      INFORMATION_SCHEMA.COLUMNS cols
                  WHERE
                      cols.TABLE_CATALOG = @DatabaseName
                      AND cols.TABLE_SCHEMA = @OwnerName
                      AND cols.TABLE_NAME = @ViewName
                  ORDER BY
                      cols.ORDINAL_POSITION";

        private const string SQL_GetTablePrimaryKey = "EXEC sp_MStablekeys @tablename";

        private const string SQL_GetTableIndexes = @"
        SELECT 
          i.name, 
          i.status, 
          i.indid, 
          i.OrigFillFactor,
          IndCol1  = INDEX_COL(@tablename, i.indid, 1),
          IndCol2  = INDEX_COL(@tablename, i.indid, 2),
          IndCol3  = INDEX_COL(@tablename, i.indid, 3),
          IndCol4  = INDEX_COL(@tablename, i.indid, 4),
          IndCol5  = INDEX_COL(@tablename, i.indid, 5),
          IndCol6  = INDEX_COL(@tablename, i.indid, 6),
          IndCol7  = INDEX_COL(@tablename, i.indid, 7),
          IndCol8  = INDEX_COL(@tablename, i.indid, 8),
          IndCol9  = INDEX_COL(@tablename, i.indid, 9),
          IndCol10 = INDEX_COL(@tablename, i.indid, 10),
          IndCol11 = INDEX_COL(@tablename, i.indid, 11),
          IndCol12 = INDEX_COL(@tablename, i.indid, 12),
          IndCol13 = INDEX_COL(@tablename, i.indid, 13),
          IndCol14 = INDEX_COL(@tablename, i.indid, 14),
          IndCol15 = INDEX_COL(@tablename, i.indid, 15),
          IndCol16 = INDEX_COL(@tablename, i.indid, 16),    
          IsDescCol1  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 1,  N'isdescending'),
          IsDescCol2  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 2,  N'isdescending'),
          IsDescCol3  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 3,  N'isdescending'),
          IsDescCol4  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 4,  N'isdescending'),
          IsDescCol5  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 5,  N'isdescending'),
          IsDescCol6  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 6,  N'isdescending'),
          IsDescCol7  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 7,  N'isdescending'),
          IsDescCol8  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 8,  N'isdescending'),
          IsDescCol9  = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 9,  N'isdescending'),
          IsDescCol10 = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 10, N'isdescending'),
          IsDescCol11 = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 11, N'isdescending'),
          IsDescCol12 = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 12, N'isdescending'),
          IsDescCol13 = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 13, N'isdescending'),
          IsDescCol14 = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 14, N'isdescending'),
          IsDescCol15 = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 15, N'isdescending'),
          IsDescCol16 = INDEXKEY_PROPERTY(OBJECT_ID(@tablename), i.indid, 16, N'isdescending'),    
          IsCompCol1  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 1),  N'IsComputed'),
          IsCompCol2  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 2),  N'IsComputed'),
          IsCompCol3  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 3),  N'IsComputed'),
          IsCompCol4  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 4),  N'IsComputed'),
          IsCompCol5  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 5),  N'IsComputed'),
          IsCompCol6  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 6),  N'IsComputed'),
          IsCompCol7  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 7),  N'IsComputed'),
          IsCompCol8  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 8),  N'IsComputed'),
          IsCompCol9  = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 9),  N'IsComputed'),
          IsCompCol10 = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 10), N'IsComputed'),
          IsCompCol11 = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 11), N'IsComputed'),
          IsCompCol12 = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 12), N'IsComputed'),
          IsCompCol13 = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 13), N'IsComputed'),
          IsCompCol14 = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 14), N'IsComputed'),
          IsCompCol15 = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 15), N'IsComputed'),
          IsCompCol16 = COLUMNPROPERTY(OBJECT_ID(@tablename), INDEX_COL(@tablename, i.indid, 16), N'IsComputed'),    
          SegName          = s.groupname,
          IsFullTextKey    = INDEXPROPERTY(OBJECT_ID(@tablename), i.name, N'IsFulltextKey'),
          IsTable          = OBJECTPROPERTY(OBJECT_ID(@tablename), N'IsTable'),
          IsStatistics     = INDEXPROPERTY(OBJECT_ID(@tablename), i.name, N'IsStatistics'),
          IsAutoStatistics = INDEXPROPERTY(OBJECT_ID(@tablename), i.name, N'IsAutoStatistics'),
          IsHypothetical   = INDEXPROPERTY(OBJECT_ID(@tablename), i.name, N'IsHypothetical'),
          IsConstraint     = CASE WHEN c.constid IS NOT NULL THEN 1 ELSE 0 END    
        FROM
          dbo.sysindexes i 
          INNER JOIN  dbo.sysfilegroups s ON i.groupid = s.groupid
          LEFT OUTER JOIN dbo.sysconstraints c ON c.[id] = OBJECT_ID(@tablename) AND i.name = OBJECT_NAME(c.constid)
        WHERE
          i.id = OBJECT_ID(@tablename) 
          AND i.indid > 0 
          AND i.indid < 255 
          AND INDEXPROPERTY(OBJECT_ID(@tablename), i.name, N'IsStatistics') = 0 -- filter out statistics
          AND INDEXPROPERTY(OBJECT_ID(@tablename), i.name, N'IsAutoStatistics') = 0 -- filter out statistics
          AND INDEXPROPERTY(OBJECT_ID(@tablename), i.name, N'IsHypothetical') = 0 -- filter out statistics
        ORDER BY
          i.indid";

        private const string SQL_GetTableKeys = "EXEC sp_MStablerefs @tablename, N'actualtables', N'both', null";

        private const string SQL_GetObjectData = "SELECT * FROM [{0}].[{1}]";

        private const string SQL_GetObjectSource = "EXEC sp_helptext @objectname";

        private const string SQL2005_GetColumnConstraints = @"
            SELECT
              object_name(const.constid) AS ConstraintName,
              CASE
                WHEN const.status & 5 = 5 THEN 'DEFAULT'
                WHEN const.status & 4 = 4 THEN 'CHECK'
                ELSE ''
              END AS ConstraintType,
              constdef.text AS ConstraintDef
            FROM
              dbo.sysobjects AS tbl
              INNER JOIN dbo.syscolumns AS clmns ON clmns.id=tbl.id
              INNER JOIN dbo.sysconstraints const ON clmns.id = const.id and clmns.colid = const.colid
              LEFT OUTER JOIN dbo.syscomments constdef ON const.constid = constdef.id
            WHERE
              SCHEMA_NAME(tbl.uid) = @SchemaName
              AND tbl.[name] = @TableName
              AND clmns.name = @ColumnName
              AND (const.status & 4 = 4 OR const.status & 5 = 5)";

        private const string SQL2000_GetColumnConstraints = @"
            SELECT
              object_name(const.constid) AS ConstraintName,
              CASE
                WHEN const.status & 5 = 5 THEN 'DEFAULT'
                WHEN const.status & 4 = 4 THEN 'CHECK'
                ELSE ''
              END AS ConstraintType,
              constdef.text AS ConstraintDef
            FROM
              dbo.sysobjects AS tbl
              INNER JOIN dbo.sysusers AS stbl ON stbl.[uid] = tbl.[uid]
              INNER JOIN dbo.syscolumns AS clmns ON clmns.id=tbl.id
              INNER JOIN dbo.sysconstraints const ON clmns.id = const.id and clmns.colid = const.colid
              LEFT OUTER JOIN dbo.syscomments constdef ON const.constid = constdef.id
            WHERE
              stbl.[name] = @SchemaName
              AND tbl.[name] = @TableName
              AND clmns.name = @ColumnName
              AND (const.status & 4 = 4 OR const.status & 5 = 5)";

        private const string SQL2005_GetCommands = @"
                  SELECT
                      object_name(id) AS OBJECT_NAME,
                      schema_name(uid) AS USER_NAME,
                      crdate AS DATE_CREATED,
                      id as OBJECT_ID
                  FROM
                      sysobjects
                  WHERE
                      type = N'P'
                      AND permissions(id) & 32 <> 0 
                      AND ObjectProperty(id, N'IsMSShipped') = 0
                      AND NOT EXISTS (SELECT * FROM sys.extended_properties WHERE major_id = id AND name = 'microsoft_database_tools_support' AND value = 1)
                  ORDER BY object_name(id)";

        private const string SQL_GetCommands = @"
                  SELECT
                      object_name(id) AS OBJECT_NAME,
                      user_name(uid) AS USER_NAME,
                      crdate AS DATE_CREATED,
                      id as OBJECT_ID
                  FROM
                      sysobjects
                  WHERE
                      type = N'P'
                      AND permissions(id) & 32 <> 0 
                      AND ObjectProperty(id, N'IsMSShipped') = 0
          ORDER BY object_name(id)";

        private const string SQL_GetCommandParameters = @"EXEC sp_procedure_params_rowset @CommandName, 1, @SchemaName, NULL";

        private const string SQL2005_GetCommandParameters = @"
            SELECT
                DB_NAME() AS [PROCEDURE_CATALOG],
                @SchemaName AS [PROCEDURE_SCHEMA],
                NULL AS [PROCEDURE_NAME],
                '@RETURN_VALUE' AS [PARAMETER_NAME],
                0 AS [ORDINAL_POSITION],
                CAST(4 AS smallint) AS [PARAMETER_TYPE],
                0 AS [PARAMETER_HASDEFAULT],
                NULL AS [PARAMETER_DEFAULT],
                CAST(0 AS bit) AS [IS_NULLABLE],
                0 AS [DATA_TYPE],
                NULL AS [CHARACTER_MAXIMUM_LENGTH],
                NULL AS [CHARACTER_OCTET_LENGTH],
                CAST(10 AS smallint) AS [NUMERIC_PRECISION],
                CAST(NULL AS smallint) AS [NUMERIC_SCALE],
                NULL AS [DESCRIPTION],
                'int' AS [TYPE_NAME],
                'int' AS [LOCAL_TYPE_NAME]
            UNION ALL
            SELECT
                DB_NAME() AS [PROCEDURE_CATALOG],
                SCHEMA_NAME(sp.schema_id) AS [PROCEDURE_SCHEMA],
                NULL AS [PROCEDURE_NAME],
                param.name AS [PARAMETER_NAME],
                param.parameter_id AS [ORDINAL_POSITION],
                CAST(CASE WHEN param.is_output = 1 THEN 2 ELSE 1 END AS smallint) AS [PARAMETER_TYPE],
                0 AS [PARAMETER_HASDEFAULT],
                NULL AS [PARAMETER_DEFAULT],
                CAST(1 AS bit) AS [IS_NULLABLE],
                0 AS [DATA_TYPE],
                CAST(CASE WHEN baset.name IN (N'nchar', N'nvarchar') AND param.max_length <> -1 THEN param.max_length/2 ELSE param.max_length END AS int) AS [CHARACTER_MAXIMUM_LENGTH],
                NULL AS [CHARACTER_OCTET_LENGTH],
                CAST(param.precision AS smallint) AS [NUMERIC_PRECISION],
                CAST(param.scale AS smallint) AS [NUMERIC_SCALE],
                NULL AS [DESCRIPTION],
                ISNULL(baset.name, N'') AS [TYPE_NAME],
                ISNULL(baset.name, N'') AS [LOCAL_TYPE_NAME]
            FROM
                sys.all_objects AS sp
                INNER JOIN sys.all_parameters AS param ON param.object_id=sp.object_id
                LEFT OUTER JOIN sys.types AS baset ON baset.user_type_id = param.system_type_id and baset.user_type_id = baset.system_type_id
            WHERE
                (sp.type = N'P' OR sp.type = N'RF' OR sp.type='PC')and(sp.name=@CommandName and SCHEMA_NAME(sp.schema_id)=@SchemaName)
            ORDER BY
                5 ASC";

        private const string SQL_GetExtendedProperties = @"
            SELECT
                p.name AS PROPERTY_NAME,
                p.value AS PROPERTY_VALUE,
                SQL_VARIANT_PROPERTY(p.value,'BaseType') AS UNDERLYING_TYPE,
                SQL_VARIANT_PROPERTY(p.value,'MaxLength') AS CHARACTER_MAXIMUM_LENGTH,
                SQL_VARIANT_PROPERTY(p.value,'Precision') AS NUMERIC_PRECISION,
                SQL_VARIANT_PROPERTY(p.value,'Scale') AS NUMERIC_SCALE
            FROM
                ::fn_listextendedproperty(NULL, @level0type, @level0name, @level1type, @level1name, @level2type, @level2name) p";

        private const string SQL_GetSqlServerVersion = "EXEC master.dbo.xp_msver ProductVersion";
        #endregion

     

     2.     MySql

               2.1     GetTables

"SELECT TABLE_NAME, '' OWNER, CREATE_TIME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '{0}' AND TABLE_TYPE = 'BASE TABLE' ORDER BY 1"

               2.2     GetTableColumns

"SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION,"
                + " NUMERIC_SCALE, CASE IS_NULLABLE WHEN 'NO' THEN 0 ELSE 1 END IS_NULLABLE, COLUMN_TYPE"
                + " FROM INFORMATION_SCHEMA.COLUMNS"
                + " WHERE TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}'"
                + " ORDER BY ORDINAL_POSITION"

               2.3     GetViews

"SELECT TABLE_NAME, '' OWNER, CREATE_TIME FROM INFORMATION_SCHEMA.TABLES WHERE TABLE_SCHEMA = '{0}' AND TABLE_TYPE = 'VIEW' ORDER BY 1"

               2.4     GetViewColumns

"SELECT COLUMN_NAME, DATA_TYPE, CHARACTER_OCTET_LENGTH, NUMERIC_PRECISION,"
                + " NUMERIC_SCALE, CASE IS_NULLABLE WHEN 'NO' THEN 0 ELSE 1 END IS_NULLABLE, COLUMN_TYPE"
                + " FROM INFORMATION_SCHEMA.COLUMNS "
                + "WHERE TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}'"
                + "ORDER BY ORDINAL_POSITION"

               2.5     GetTablePrimaryKey

"SELECT t1.CONSTRAINT_NAME, t1.COLUMN_NAME"
                + " FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1"
                + "  INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t2"
                + "  ON t2.TABLE_SCHEMA = t1.TABLE_SCHEMA"
                + "  AND t2.TABLE_NAME = t1.TABLE_NAME"
                + "  AND t2.CONSTRAINT_NAME = t1.CONSTRAINT_NAME"
                + " WHERE t1.TABLE_SCHEMA = '{0}' AND t1.TABLE_NAME = '{1}'"
                + " AND t2.CONSTRAINT_TYPE = 'PRIMARY KEY'"
                + " ORDER BY t1.ORDINAL_POSITION"

               2.6     GetTableIndexes

"SELECT INDEX_NAME, COUNT(*) AS COLUMN_COUNT, MAX(NON_UNIQUE) NON_UNIQUE,"
                + " CASE INDEX_NAME WHEN 'PRIMARY' THEN 1 ELSE 0 END IS_PRIMARY"
                + " FROM INFORMATION_SCHEMA.STATISTICS"
                + " WHERE  TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}'"
                + " GROUP BY INDEX_NAME"
                + " ORDER BY INDEX_NAME;"

                + " SELECT INDEX_NAME, COLUMN_NAME"
                + " FROM INFORMATION_SCHEMA.STATISTICS"
                + " WHERE  TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}'"
                + " ORDER BY INDEX_NAME, SEQ_IN_INDEX;"

               2.7     GetTableKeys 注意这里分别调用 2.7.1和2.7.2才能全部取到

                    2.7.1     GetMyTableKeys

"SELECT CONSTRAINT_NAME"
                + " FROM INFORMATION_SCHEMA.TABLE_CONSTRAINTS t1"
                + " WHERE t1.TABLE_SCHEMA = '{0}' AND t1.TABLE_NAME = '{1}'"
                + "  AND CONSTRAINT_TYPE = 'FOREIGN KEY';"

                + " SELECT t1.CONSTRAINT_NAME, t1.COLUMN_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT,"
                + "  t1.REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME"
                + " FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1"
                + "  INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t2"
                + "  ON t2.TABLE_SCHEMA = t1.TABLE_SCHEMA"
                + "  AND t2.TABLE_NAME = t1.TABLE_NAME"
                + "  AND t2.CONSTRAINT_NAME = t1.CONSTRAINT_NAME"
                + " WHERE t1.TABLE_SCHEMA = '{0}' AND t1.TABLE_NAME = '{1}'"
                + "  AND t2.CONSTRAINT_TYPE = 'FOREIGN KEY'"
                + " ORDER BY t1.CONSTRAINT_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT"

                    2.7.2     GetOthersTableKeys

"SELECT DISTINCT CONSTRAINT_NAME"
                + " FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1"
                + " WHERE t1.TABLE_SCHEMA = '{0}' AND t1.REFERENCED_TABLE_NAME = '{1}';"

                + " SELECT t1.CONSTRAINT_NAME, t1.TABLE_NAME, t1.COLUMN_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT,"
                + "  t1.REFERENCED_TABLE_NAME, REFERENCED_COLUMN_NAME"
                + " FROM INFORMATION_SCHEMA.KEY_COLUMN_USAGE t1"
                + "  INNER JOIN INFORMATION_SCHEMA.TABLE_CONSTRAINTS t2"
                + "  ON t2.TABLE_SCHEMA = t1.TABLE_SCHEMA"
                + "  AND t2.TABLE_NAME = t1.TABLE_NAME"
                + "  AND t2.CONSTRAINT_NAME = t1.CONSTRAINT_NAME"
                + " WHERE t1.TABLE_SCHEMA = '{0}' AND t1.REFERENCED_TABLE_NAME = '{1}'"
                + "  AND t2.CONSTRAINT_TYPE = 'FOREIGN KEY'"
                + " ORDER BY t1.CONSTRAINT_NAME, t1.POSITION_IN_UNIQUE_CONSTRAINT"

          2.8     GetTableData     "SELECT * FROM {0}"          

          2.9     GetViewData     "SELECT * FROM {0}"

          2.10     GetViewText

"SELECT VIEW_DEFINITION FROM INFORMATION_SCHEMA.VIEWS WHERE TABLE_SCHEMA = '{0}' AND TABLE_NAME = '{1}'"

          2.11     GetCommands     string.Format参数:数据库名

"SELECT ROUTINE_NAME, '' OWNER, CREATED FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA = '{0}' AND ROUTINE_TYPE = 'PROCEDURE' ORDER BY 1"

          2.12     GetCommandParameters     >_<  ，没有提供，显示：throw new NotSupportedException("GetCommandParameters() is not supported in this release.");

          2.13     GetCommandText

"SELECT ROUTINE_DEFINITION FROM INFORMATION_SCHEMA.ROUTINES WHERE ROUTINE_SCHEMA = '{0}' AND ROUTINE_NAME = '{1}'"

 

     3.     Oracle

               3.1     GetTables

"SELECT owner, object_name, created FROM all_objects WHERE (owner in ( select USERNAME from user_users  )) AND object_type = 'TABLE'      ORDER BY owner,    object_name"

               3.2     GetTableColumns

@"select cols.column_name, 
                             cols.data_type, 
                             cols.data_length,
                             cols.data_precision, 
                             cols.data_scale,
                             cols.nullable,        
                             cmts.comments
                      from  all_tab_columns cols, 
                            all_col_comments cmts 
                      where 
                            cols.owner = '{0}'
                        and cols.table_name = '{1}'
                        and cols.owner = cmts.owner 
                        and cols.table_name = cmts.table_name 
                        and cols.column_name = cmts.column_name
                        order by column_id"

               3.3     GetViews

@"select 
                    v.owner, v.view_name, o.created
                from all_views   v,
                    all_objects o 
                where v.view_name = o.object_name 
                and o.object_type = 'VIEW' 
                and (v.owner in ( select USERNAME from user_users  ))
                order by v.owner, v.view_name"

                3.4     GetViewColumns

@"select cols.column_name, 
                             cols.data_type, 
                             cols.data_length,
                             cols.data_precision, 
                             cols.data_scale,
                             cols.nullable,        
                             cmts.comments
                      from  all_tab_columns cols, 
                            all_col_comments cmts 
                      where 
                            cols.owner = '{0}'
                        and cols.table_name = '{1}'
                        and cols.owner = cmts.owner 
                        and cols.table_name = cmts.table_name 
                        and cols.column_name = cmts.column_name
                        order by column_id"

               3.5     GetTablePrimaryKey

@"
                    select 
                        cols.constraint_name, 
                        cols.column_name, 
                        cols.position 
                    from
                        all_constraints     cons,
                        all_cons_columns    cols
                    where 
                        cons.OWNER = '{0}'
                        and cons.table_name = '{1}'
                        and cons.constraint_type='P'
                        and cols.owner = cons.owner
                        and cols.table_name = cons.table_name   
                        and cols.constraint_name = cons.constraint_name 
                    order by cons.constraint_name, cols.position"

               3.6     GetTableIndexes

@"
                select        idx.owner, idx.uniqueness, con.constraint_type, idx.table_type, col.*
                from        all_ind_columns col,
                            all_indexes idx,
                            all_constraints con
                where        idx.table_owner = '{0}'
                            AND idx.table_name = '{1}'
                            AND idx.owner = col.index_owner
                            AND idx.index_name = col.index_name
                            AND idx.owner = con.owner (+)
                            AND idx.table_name = con.table_name(+)
                            AND idx.index_name = con.constraint_name(+)"

               3.7     GetTableKeys

@"select 
                    cols.constraint_name, 
                    cols.column_name, 
                    cols.position, 
                    r_cons.table_name related_table_name, 
                    r_cols.column_name related_column_name 
                from
                    all_constraints     cons,
                    all_cons_columns    cols,
                    all_constraints     r_cons,
                    all_cons_columns    r_cols
                where cons.OWNER = '{0}'
                  and cons.table_name = '{1}'
                  and cons.constraint_type='R'
                  and cols.owner = cons.owner
                  and cols.table_name = cons.table_name   
                  and cols.constraint_name = cons.constraint_name 
                  and r_cols.owner = cons.r_owner 
                  and r_cols.constraint_name = cons.r_constraint_name 
                  and r_cons.owner = r_cols.owner 
                  and r_cons.table_name = r_cols.table_name 
                  and r_cons.constraint_name = r_cols.constraint_name 
                order by cons.constraint_name, cols.position"

               3.8     GetTableData     "SELECT * FROM {0}.{1}"               

               3.9     GetViewData     "SELECT * FROM {0}.{1}"

               3.10     GetViewText     

@"select        text
                from        all_views
                where        owner = '{0}'
                            and view_name = '{1}'"

               3.11     GetCommands

@"    select methods.owner, 
                            methods.package_name, 
                            methods.object_name, 
                            methods.overload,
                            ao.object_type,
                            ao.created,
                            ao.status,
                            ao.object_id
                        from
                        (select distinct owner, package_name, object_name, overload, object_id from ALL_ARGUMENTS 
                            where (owner in ( select USERNAME from user_users  ))
                            ) methods,
                            all_objects ao
                        where ao.object_id = methods.object_id    
                        order by methods.owner, methods.package_name, methods.object_name"

               3.12     GetCommandParameters

@"select 
                        ARGUMENT_NAME, 
                        POSITION, 
                        SEQUENCE, 
                        DATA_LEVEL, 
                        DATA_TYPE, 
                        IN_OUT, 
                        DATA_LENGTH, 
                        DATA_PRECISION, 
                        DATA_SCALE  
                    from ALL_ARGUMENTS 
                    where object_ID={0}
                    and object_name = '{1}'
                    and {2}
                    order by position"

                    备注：{2}参数 源码是：overload > 0 ? "overload = " + overload : "overload is null"，由于我对Oracle并不熟悉，并且翻了一点资料，得知这个是超载参数的设置，熟悉的人自己来配吧，有精通之人劳烦告知一下此处默认语句该如何配置。

               3.13     GetCommandText  >_< 没有提供！信息如下：throw new NotImplementedException("Retrieval of command text has not yet been implemented.");

结束

     对于元数据的获取，用获取数据库结构的奥义......(无码，完全版，未删节) 的文章也不错，但是没有办法取得默认值，所以大家根据自己的要求选择获取的方式就行了。由于处于Ctrl+C和Ctrl+V，难免脑袋有些发麻，发现张冠李戴的情况请速报，以便及时更新: )

注意

     本文的SQL语句是直接完全拷贝的源代码，SQLSERVER 2000大部分测试没有问题，其他的请自行测试 ！

ps:     本来是想把代码折叠一下的，但是这样方便拷贝:)