plsql去重语句

毕涛修1568sql去除重复字段的语句 -
毕饺霭17052133342 ______ select distinct XX from aa;

毕涛修1568SQL语句,删除重复记录. -
毕饺霭17052133342 ______ 如果按题目那个样子,这个表只有一个字段的话楼上的解答应该是合要求的吧.就是选出来存在一个临时表里然后再填回去: select distinct test_name into #Tmp from test1 drop table test1 select * into test1 from #Tmp drop table #Tmp 但是如果按正常的情况下这个表总会有个主键什么的吧?比如说是有个自增的ID字段.这种情况下就可以: delete test1 where ID not in (select ID from test1 group by test_name)

毕涛修1568在SQL中用了union all怎样去掉重复
毕饺霭17052133342 ______ 在外层套1个查询,加上distinct关键字就能够去重了select distinct * from (select * from a union all select * from b)t

毕涛修1568Oracle去除重复列的SQL语句怎么写 -
毕饺霭17052133342 ______ 用 distinct 属性,在select之后加distinct 例:select distinct * from table;select distinct name,age from table where 条件;

毕涛修1568sql查询语句怎么去除表中的重复数据 -
毕饺霭17052133342 ______ select id, name, memo from A where id in (select id from A group by id having count(1) >= 2) select id, name, memo from A where id in (select id from A group by id having count(1) >= 2)

毕涛修1568sql语句怎么去除多个字段重复的记录 -
毕饺霭17052133342 ______ create view a_dist_view as select a.*, row_number() over(order by id, name) rn from a_dist as a delete from a_dist_view where rn 1

毕涛修1568sql查询中如何去除某个字段重复的数据 -
毕饺霭17052133342 ______ 我一般用这个: 假设怀疑重复的字段名为SeriNo, select * from [tablename] group by SeriNo having count(SeriNo)<>1

毕涛修1568SQL重复数据只显示一条,查询语句怎么写 -
毕饺霭17052133342 ______ select distinct * from table; 使用distinct 关键字来进行去重复

毕涛修1568oracle sql 去重复记录不用distinct如何实现 -
毕饺霭17052133342 ______ 1、查找表中多余的重复记录,重复记录是根据单个字段(peopleId)来判断 select * from people where peopleId in (select peopleId from people group by peopleId having count(peopleId) >1) 2、删除表中多余的重复记录,重复记录是根据单个字...

毕涛修1568plsql删除表中相同数据 -
毕饺霭17052133342 ______ 删除表中多余的重复记录(多个字段),只留有rowid最小的记录假设字段为a,b,cdelete from 表aa where (aa.a,aa.b,aa.c) in (select a,b,c from 表group by a,b,c having count(*) > 1) an...