SQL Server????????????????
???????????? ???????[ 2013/3/28 11:30:03 ] ????????
???????Index Building Filter????????????????
???????Щ?????????Ч??????羭?????????????е????????????99%??????????1%??????? ?????????????????????????????????????????????????о??????б?????99%???????????????????????????????????????????????????????????????????????????????á? Index Building Filter????????????????
????SQLServer
???????????????
create index idx_3 on order(status) where status=’running’
??MySQL???????
????Oracle????????????????÷??????
????????Index Include Column???????????У?
?????????????????Щ?????????????????????
????1????????????????????????????
???????綩?????л??ID?????????2????Σ?????????????????????????????
Select * from order where member_id=? and order_date between ? and ?
????????????ID+???????????????????
create index idx_1 on order(member_id??order_date);
????2????????????
?????????????????????????????????ID+???б??SQL???£?
select order_id??status from order where member_id=?
?????????????????????member_id??Σ??????????????order_id??status??????????????????????member_id+order_id+status???????????
?????????????????????????????????????????????????????????????????Σ??????????????????????????????
????SQLServer
????SQLServer?????????????????????Index Include Column?????Index Include Column????????????????????????????????????????????Щ?????????У???Щ??????????洢???????У???????????????????????????????????????????????DML????????????磺
create index idx_2 on order(member_id) include(order_id??status);
????????member_id?????????????У?order_id??status????????include?С?
??????????????????洢???????
??????
???·???
??????????????????
2023/3/23 14:23:39???д?ò??????????
2023/3/22 16:17:39????????????????????Щ??
2022/6/14 16:14:27??????????????????????????
2021/10/18 15:37:44???????????????
2021/9/17 15:19:29???·???????·
2021/9/14 15:42:25?????????????
2021/5/28 17:25:47??????APP??????????
2021/5/8 17:01:11