_覓 | 覦覈襦 | 豕蠏手 | 殊螳 | 譯殊碁 |
FrontPage › ForceSeek
|
|
Force Seek 螳襦 碁煙るゼ 郁鍵(?) 貎朱Μ 碁. 襯 覲企 所 . ろ碁ゼ 譴觜襯 .
use tempdb go set nocount on set statistics io off --drop table force_seek_table create table force_seek_table ( col1 int identity not null, col2 tinyint not null ); go begin tran; declare @i int; set @i = 1; while (@i <= 1000000) begin if (@i <=100000) insert into force_seek_table (col2) values (10); if (@i > 100000 and @i <= 1000000) insert into force_seek_table (col2) values (90); set @i = @i + 1; end commit; go create nonclustered index force_seek_table on force_seek_table (col2); go れ 貎朱Μ襯 ろ 覲伎.
select * from force_seek_table where col2 = 10; SQL Server 牛磯伎 れ . Force Seek 碁ゼ 譯朱 企至 蟾? 轟壱 Index Seek .
select * from force_seek_table with (forceseek) where col2 = 10;
鏤
|
螻手碓襯 蟆 れる慨讌 襷. 蠏瑚 れ れ . 襯 蠍磯´蟆 伎. 蠏瑚 蠏碁 蟆企. 谿 蠍一朱 れ襷螻 螳 覓伎螳襯 襷朱. |