SQL SERVER之查询外键及索引

--查询表或数据库中的所有外键

select
A.name as 约束名,
object_name(b.parent_object_id) as 外健表,
c.name as 外键列,
object_name(b.referenced_object_id) as 主健表,
D.name as 主键列
from sys.foreign_keys A
inner join sys.foreign_key_columns B on A.object_id=b.constraint_object_id
inner join sys.columns C on B.parent_object_id=C.object_id and B.parent_column_id=C.column_id 
inner join sys.columns D on B.referenced_object_id=d.object_id and B.referenced_column_id=D.column_id 
where object_name(B.referenced_object_id)='TB_TestConfigTemplate';--主键表

-- 查询一个表或数据库中的索引及索引列

SELECT  indexname = a.name , tablename = c. name , indexcolumns = d .name , a .indid
FROM    sysindexes a JOIN sysindexkeys b ON a .id = b .id  AND a .indid = b.indid
        JOIN sysobjects c ON b .id = c .id
        JOIN syscolumns d ON b .id = d .id  AND b .colid = d .colid
WHERE   a .indid NOT IN ( 0 , 255 )  --indid=1代表聚集索引 indid>1代表非聚集索引
-- and   c.xtype='U'   and   c.status>0 -- 查所有用户表
--AND c .name = 'DatabaseLog' --查指定表
ORDER BY c. name ,
        a.name ,
        d.name