关于数据库表中的索引及索引列的CRUD
-- 查询一个数据库表中的索引及索引列
use [RuPengWangDB]
GO
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 )
and c.xtype='U' -- and c.status>0 -- 查所有用户表
--AND c .name = 'nfms_recieve_ChaPianXL' --查指定表
ORDER BY c. name ,
a.name ,
d.name
use [RuPengWangDB]
GO
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 )
and c.xtype='U' -- and c.status>0 -- 查所有用户表
--AND c .name = 'nfms_recieve_ChaPianXL' --查指定表
ORDER BY c. name ,
a.name ,
d.name
查询
增加
删除
使用索引会比不使用索引快很多，下面是计算时间
