sqlserver建立索引时的include--覆盖索引

  执行一个sqlhtml select id,name from s_student where class_id = '1' 对于sqlserver 2000. 若是使用覆盖索引, 能够创建索引sql CREATE NONCLUSTERED INDEX IX_CLASSID_1 ON dbo.s_student (class_id,id,name) 若是有查询是 select xx

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