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
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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
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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
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select
index_name,index_type,table_name
from
user_indexes
where
table_name=
'表名'
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SqlServer查询一个表上的索引
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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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以上内容就是本文全部所述，希望大家喜欢。
