----查询所有的表
SELECT * FROM SYSOBJECTS WHERE TYPE='U'
----根据表名查询所有的字段名及其注释
SELECT A.NAME,B.VALUE
FROM SYSCOLUMNS A
LEFT JOIN SYS.EXTENDED_PROPERTIES B ON A.ID=B.MAJOR_ID AND A.COLID=B.MINOR_ID
INNER JOIN SYSOBJECTS C ON A.ID=C.ID AND UPPER(C.NAME)='tb_name'
------根据表名查询该表所有的关联表
SELECT 主键列ID=b.rkey
,主键列名=(SELECT name FROM syscolumns WHERE colid=b.rkey AND id=b.rkeyid)
,外键表ID=b.fkeyid
,外键表名称=object_name(b.fkeyid)
,外键列ID=b.fkey
,外键列名=(SELECT name FROM syscolumns WHERE colid=b.fkey AND id=b.fkeyid)
,级联更新=ObjectProperty(a.id,'CnstIsUpdateCascade')
,级联删除=ObjectProperty(a.id,'CnstIsDeleteCascade')
FROM sysobjects a
join sysforeignkeys b on a.id=b.constid
join sysobjects c on a.parent_obj=c.id
where a.xtype='f' AND c.xtype='U'
and object_name(b.rkeyid)='tb_name' ----主表表名
----查询关联表的表说明、主键列名、外表表名称、外键列名
SELECT
表说明 = isnull(d.value,object_name(b.fkeyid))
,主键列名=(SELECT name FROM syscolumns WHERE colid=b.rkey AND id=b.rkeyid)
,外键表名称=object_name(b.fkeyid)
,外键列名=(SELECT name FROM syscolumns WHERE colid=b.fkey AND id=b.fkeyid)
FROM sysobjects a
join sysforeignkeys b on a.id=b.constid
join sysobjects c on a.parent_obj=c.id
left join sys.extended_properties d on d.minor_id = 0 and c.id = d.major_id
where a.xtype='f' AND c.xtype='U'
and object_name(b.rkeyid)='tb_name' ----主表表名
------最全的表信息查询
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='tb_name'
order by
a.id,a.colorder