詳解sqlserver查詢表索引，詳解sqlserver索引

詳解sqlserver查詢表索引，詳解sqlserver索引

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

需創建索引 例如：

根據某列判斷是否有重復記錄，如果該列為非主鍵，則創建索引

根據經常查詢的列，創建索引

無須創建索引

字段內容大部分一樣，例如：男，女

不要給所有的列都創建索引，這樣在創建新記錄時，增加維護開銷時間。

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是你要查詢的表

以上內容就是本文全部所述，希望大家喜歡。