MSSQL 获取所有表及字段定义

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