sql 2012中获取表的信息，包含字段的描述

1.获取数据库中的表

select name from sysobjects where type='U'

2.获取表字段（此处是Route表）

Select name from syscolumns Where ID=OBJECT_ID('Route')

3.获取表中字段的描述

SELECT   value  FROM   ::fn_listextendedproperty (NULL, 'user', 'dbo', 'table', 'Route', 'column', default)

4.获取表的信息的所有信息如下图

select   b.[value] from sys.columns a left join sys.extended_properties b on a.object_id=b.major_id
and a.column_id=b.minor_id inner join sysobjects c on a.column_id=c.id
and a.[name]='列名' and c.[name]='表名'
SELECT
表名=case   when   a.colorder=1   then   d.name   else   ''   end,
表说明=case   when   a.colorder=1   then   isnull(f.value,'')   else   ''   end,
字段序号=a.colorder,
字段名=a.name,
标识=case   when   COLUMNPROPERTY(   a.id,a.name,'IsIdentity')=1   then   '√'else   ''   end,
主键=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   =   a.id   AND   colid=a.colid
)))   then   '√'   else   ''   end,
类型=b.name,
占用字节数=a.length,
长度=COLUMNPROPERTY(a.id,a.name,'PRECISION'),
小数位数=isnull(COLUMNPROPERTY(a.id,a.name,'Scale'),0),
允许空=case   when   a.isnullable=1   then   '√'else   ''   end,
默认值=isnull(e.text,''),
字段说明=isnull(g.[value],'')
FROM   syscolumns   a
left   join   systypes   b   on   a.xusertype=b.xusertype
inner   join   sysobjects   d   on   a.id=d.id     and   d.xtype='U'   and     d.name<>'dtproperties'
left   join   syscomments   e   on   a.cdefault=e.id
left   join   sys.extended_properties   g   on   a.id=g.major_id   and   a.colid=g.minor_id
left   join   sys.extended_properties   f   on   d.id=f.major_id   and   f.minor_id=0
--where   d.name='orders'         --如果只查询指定表,加上此条件
order   by   a.id,a.colorder

如下图

 

5.获取一个表的表名，字段名，数据类型，字段说明的简写SQL：

SELECT 
    --表名
    [TableName] = i_s.TABLE_NAME, 
    --列名
    [ColumnName] = i_s.COLUMN_NAME, 
    --字段描述
    [Description] = s.value,
    --数据类型
    [DataType]=i_s.DATA_TYPE ,
    --是否是主键
    [IsPrimaryKey]=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   =   a.id   AND   colid=a.colid
                )))   then   '1'   else   '0'   end
    FROM 
    INFORMATION_SCHEMA.COLUMNS i_s 
    LEFT OUTER JOIN sys.extended_properties s ON 
                        s.major_id = OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME) 
                       AND s.minor_id = i_s.ORDINAL_POSITION
                        AND s.name = 'MS_Description' 
    INNER JOIN     syscolumns a ON a.id=s.major_id AND a.colid=s.minor_id

    WHERE OBJECTPROPERTY(OBJECT_ID(i_s.TABLE_SCHEMA+'.'+i_s.TABLE_NAME), 'IsMsShipped')=0 
          AND i_s.TABLE_NAME = 'BusRoute' AND i_s.TABLE_SCHEMA='office'
          ORDER BY i_s.TABLE_NAME, i_s.ORDINAL_POSITION