详解sqlserver查询表索引

select   索引名称=a.name 

,表名=c.name 

,索引字段名=d.name 

,索引字段位置=d.colid 

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='message' --查指定表 
order by  c.name,a.name,d.name

需创建索引 例如：

根据某列判断是否有重复记录，如果该列为非主键，则创建索引

根据经常查询的列，创建索引

无须创建索引

字段内容大部分一样，例如：男，女

不要给所有的列都创建索引，这样在创建新记录时，增加维护开销时间。

oracle 查询用户表索引

select index_name,index_type,table_name from user_indexes where table_name='表名'

 sqlserver查询一个表上的索引

select 
tableid=o.[object_id],
tablename=o.name,
indexid=isnull(kc.[object_id],idx.index_id),
indexname=idx.name,
indextype=isnull(kc.type_desc,'index'),
index_column_id=idxc.index_column_id,
columnid=c.column_id,
columnname=c.name,
sort=case indexkey_property(idxc.[object_id],idxc.index_id,idxc.index_column_id,'isdescending')
when 1 then 'desc' when 0 then 'asc' else '' end,
primarykey=case when idx.is_primary_key=1 then n'√'else n'' end,
[uqique]=case when idx.is_unique=1 then n'√'else n'' end,
ignore_dup_key=case when idx.ignore_dup_key=1 then n'√'else n'' end,
disabled=case when idx.is_disabled=1 then n'√'else n'' end,
fill_factor=idx.fill_factor,
padded=case when idx.is_padded=1 then n'√'else n'' end
from sys.indexes idx 
inner join sys.index_columns idxc
on idx.[object_id]=idxc.[object_id]
and idx.index_id=idxc.index_id
left join sys.key_constraints kc
on idx.[object_id]=kc.[parent_object_id]
and idx.index_id=kc.unique_index_id
inner join sys.objects o
on o.[object_id]=idx.[object_id]
inner join sys.columns c
on o.[object_id]=c.[object_id]
and o.type='u'
and o.is_ms_shipped=0
and idxc.column_id=c.column_id where o.name='cz201' --cz201是你要查询的表

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