SELECT   索引名稱=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 --查所有用戶表 AND c.name='message' --查指定表 ORDER BY c.name,a.name,d.name

需創(chuàng)建索引 例如：

根據(jù)某列判斷是否有重復(fù)記錄，如果該列為非主鍵，則創(chuàng)建索引

根據(jù)經(jīng)常查詢的列，創(chuàng)建索引

無(wú)須創(chuàng)建索引

字段內(nèi)容大部分一樣，例如：男，女

不要給所有的列都創(chuàng)建索引，這樣在創(chuàng)建新記錄時(shí)，增加維護(hù)開銷時(shí)間。

Oracle 查詢用戶表索引

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

 SqlServer查詢一個(gè)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'' ENDFROM sys.indexes IDX INNER JOIN sys.index_columns IDXCON IDX.[object_id]=IDXC.[object_id]AND IDX.index_id=IDXC.index_idLEFT JOIN sys.key_constraints KCON IDX.[object_id]=KC.[parent_object_id]AND IDX.index_id=KC.unique_index_idINNER JOIN sys.objects OON O.[object_id]=IDX.[object_id]INNER JOIN sys.columns CON O.[object_id]=C.[object_id]AND O.type='U'AND O.is_ms_shipped=0AND IDXC.Column_id=C.Column_id where O.name='cz201' --cz201是你要查詢的表

以上內(nèi)容就是本文全部所述，希望大家喜歡。