SQL Server查询优化
D00303569′,’JCNAD00303568′,’JCNAD00306698′,’JCNAD00231935′,’JCNAD00231933′,’JCNAD00254567′, ‘JCNAD00254585′,’JCNAD00254608′,’JCNAD00254607′,’JCNAD00258524′,’JCNAD00332133′,’JCNAD00268618′, ‘JCNAD00279196′,’JCNAD00268613′) order by postdate desc35、在IN后面值的列表中,将出现最频繁的值放在最前面,出现得最少的放在最后面,减少判断的次数36、当用SEL