日期:2014-05-16  浏览次数:20599 次

问一条简单的sql语句效率问题
存储过程如下
SQL code
BEGIN
 
 SELECT * FROM `literature` where `status`=1 and auditstatus=2 and UID in
(
select ItemId from userfavdata 
where GroupName='literature' and deviceID=`pDeviceId`  

)

 order by literatureYear,MagazineName;

END


参数为
SQL code
IN `pDeviceId` char(36)


------解决方案--------------------
UID 
ItemId 上建立索引