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  • [收藏]取得数据库字典的sql语句

    --MS SQL SERVER 2000 取得所有表和视图的名称、字段名、字段类型、说明、长度等
    SELECT sysobjects.name AS TableName, sysproperties.[value] AS 表说明,
          syscolumns.name AS FieldName, properties.[value] AS 字段说明, systypes.name AS FieldType,
          syscolumns.length, ISNULL(COLUMNPROPERTY(syscolumns.id, syscolumns.name,
          'Scale'), 0) AS 小数位数, syscolumns.isnullable AS isnull,
          CASE WHEN syscomments.text IS NULL
          THEN '' ELSE syscomments.text END AS [Default],
          CASE WHEN COLUMNPROPERTY(syscolumns.id, syscolumns.name, 'IsIdentity')
          = 1 THEN '1' ELSE '' END AS 标识, CASE WHEN EXISTS
              (SELECT 1
             FROM sysobjects
             WHERE xtype = 'PK' AND name IN
                       (SELECT name
                      FROM sysindexes
                      WHERE indid IN
                                (SELECT indid
                               FROM sysindexkeys
                               WHERE id = syscolumns.id AND colid = syscolumns.colid)))
          THEN '1' ELSE '' END AS 主键
    FROM syscolumns INNER JOIN
          sysobjects ON sysobjects.id = syscolumns.id INNER JOIN
          systypes ON syscolumns.xtype = systypes.xtype LEFT OUTER JOIN
          sysproperties properties ON syscolumns.id = properties.id AND
          syscolumns.colid = properties.smallid LEFT OUTER JOIN
          sysproperties ON sysobjects.id = sysproperties.id AND
          sysproperties.smallid = 0 LEFT OUTER JOIN
          syscomments ON syscolumns.cdefault = syscomments.id
    WHERE (sysobjects.xtype = 'U' OR sysobjects.xtype = 'V')

    --MS SQL SERVER 2000 取得所有表和视图的名称、字段名、字段类型
    SELECT dbo.sysobjects.name AS TableName, dbo.syscolumns.name AS FieldName,
          dbo.systypes.name AS FieldType, '' AS FieldDesc
    FROM dbo.syscolumns INNER JOIN
          dbo.sysobjects ON dbo.sysobjects.id = dbo.syscolumns.id INNER JOIN
          dbo.systypes ON dbo.syscolumns.xtype = dbo.systypes.xtype
    WHERE ((dbo.sysobjects.xtype = 'U') OR (dbo.sysobjects.xtype = 'V')) and dbo.systypes.name <> 'sysname'



    --FireBird 取得所有表和视图的名称、字段名、字段类型等
    SELECT T2.RDB$RELATION_NAME AS TABLENAME,
           T2.RDB$FIELD_NAME AS FIELDNAME,
           CASE T1.RDB$FIELD_TYPE WHEN 7 THEN 'SMALLINT'
                                  WHEN 8 THEN 'INTEGER'
                                  WHEN 10 THEN 'FLOAT'
                                  WHEN 12 THEN 'DATE'
                                  WHEN 13 THEN 'TIME'
                                  WHEN 14 THEN 'CHAR'
                                  WHEN 16 THEN 'DECIMAL'
                                  WHEN 27 THEN 'DOUBLE'
                                  WHEN 35 THEN 'TIMESTAMP'
                                  WHEN 37 THEN 'VARCHAR'
                                  WHEN 261 THEN 'BLOB'
                                  ELSE 'UNKNOW'
           END AS FIELDTYPE
    FROM RDB$FIELDS T1, RDB$RELATION_FIELDS T2
    WHERE T1.RDB$SYSTEM_FLAG = 0  AND T1.RDB$FIELD_NAME = T2.RDB$FIELD_SOURCE

    --Oracle取得所有表和视图的名称、字段名、字段类型:
    select TABLE_NAME as TableName, COLUMN_NAME AS FieldName, DATA_TYPE AS FieldType
    from user_tab_columns

    --PostgreSQL取得所有表和视图的名称、字段名、字段类型:

    SELECT TABLE_NAME as TableName, COLUMN_NAME AS FieldName, DATA_TYPE AS FieldType
    FROM information_schema.columns
    WHERE table_schema='public'

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  • 原文地址:https://www.cnblogs.com/81/p/412884.html
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