SqlServer 查询表、表说明、关联表、字段说明，语句汇总

----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