［生成数据字典］取数据库表中字段的描述信息

最新推荐文章于 2022-05-25 17:17:59 发布

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最新推荐文章于 2022-05-25 17:17:59 发布

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原文链接：http://www.cnblogs.com/qiantuwuliang/archive/2009/06/06/1497369.html

本文提供两种SQL查询语句，分别适用于SQL Server 2000和2005，用于获取名为'Contract'表的详细结构信息，包括字段名、类型、长度、描述等。

Sql2000:
==========================

SELECT SysObjects.Name, --表名
    SysColumns.Name,  --字段名
    SysTypes.Name,  --字段类型
    SysColumns.Length,  --字段长度
    SysProperties.Value  --字段描述
  FROM SysObjects,
  SysTypes,
  SysColumns
  LEFT JOIN SysProperties
  ON (Syscolumns.Id   =   Sysproperties.Id   AND   Syscolumns.Colid = Sysproperties.Smallid)
  WHERE (Sysobjects.Xtype   ='u' OR Sysobjects.Xtype   ='v')
  AND Sysobjects.Id = Syscolumns.Id
  AND SysTypes.XType = Syscolumns.XType
  AND Sysobjects.Name = 'Contract' --指字要查找的表名
  ORDER BY smallid

SqlServer2005:
=============================

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 parent_obj=a.id 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='Contract'    --如果只查询指定表,加上此条件
order by
    a.id,a.colorder

转载于:https://www.cnblogs.com/qiantuwuliang/archive/2009/06/06/1497369.html