SQL 查询表中某一字段不重复的所有数据

1、创建测试表，

create table test_dis(id number, name varchar2(20), value number(10))

2、插入测试数据

insert into test_dis values(1,'a',123)

insert into test_dis values(2,'b',152)

insert into test_dis values(3,'c',123)

insert into test_dis values(4,'d',520)

insert into test_dis values(5,'e',300)

commit

3、查询表中全量数据，select t.*, rowid from test_dis t

4、编写sql，查询表中某一字段不重复的所有数据，可以发现只有id为2，4，5的记录查询出。

 select * from test_dis t where value in (select value from test_dis group by value having count(*)=1)

cc列如下:

xxx

vvv

bbbb

ccc

xxx

想只要显示

xxx

vvv

bbbb

ccc

解决方法如下：

如果得到所有值不重复。

select cc from tablename group by cc

或

select distinct cc form tablename

如果得到没有重复的所有制，

select cc from tablename group by cc

minus

select cc

from(

select cc,count(*) from tablename group by cc having count(*)>1) A