weixin_39575170的博客以下有两个表,他们的结构完全相同,请通过SQL找出值不同的列。Student_1NAMEAGESCOREpeter26100jack2596daniel2648bark2169Student_2NAMEAGESCOREpeter2689jack2596daniel2648bark2169方法一 -- NOT EXISTS:SELECT...
真力 GENELEC的博客> 1)and rowid not in (select min(rowid) from people group by peopleId having count(peopleId )>1) 3、查找表中多余的重复记录(多个字段) select * from vitae awhere (a.peopleId,a.seq) in (select peopleId...