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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