Sql Server数据字典

1：添加字段属性或者表属性

execute sys.sp_addextendedproperty
@name = N'MS_Description',
@value = N'要添加的属性信息', 
@level0type = N'Schema', 
@level0name = N'dbo', 
@level1type = N'table', 
@level1name = N'表名', 
@level2type = N'column', 
@level2name = N'列名'

2:Sql Server 生成数据字典

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.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 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='要查询的表' --如果只查询指定表名
　　order by a.id,a.colorder