SQL 通过SQL语句检索字段类型、长度、主键

SQL 通过SQL语句检索字段类型、长度、主键

方式1：

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select 字段名=a.name, 标识=case when COLUMNPROPERTY( a.id,a.name,'IsIdentity')=1 then '是' 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))) and a.isnullable<>1 then '是' else '' end, 类型=b.name, 长度=a.length, 允许空=case when a.isnullable=1 then '是' else '' end, 默认值=isnull(e.text,'') FROM syscolumns a left join systypes b on a.xtype=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 sysproperties g on a.id=g.id and a.colid=g.smallid --left join sysproperties f on d.id=f.id and f.smallid=0 where d.name='表名' --where d.name='表名' [ and a.name= '字段名' ]

 

方式2：

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select 字段名=a.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) FROM syscolumns a left join systypes b on a.xtype=b.xusertype inner join sysobjects d on a.id=d.id  and d.xtype='U' and d.status>=0 where d.name='表名'

 

　　

 

　　

　　

创建时间：2020.11.12　　更新时间：