sql怎么去掉某个字段不同的重复数据

发布网友发布时间：2022-04-08 11:08

共2个回答

懂视网时间：2022-04-08 15:29

/////////////////////目地：ZDJZ_DIS中 name字段有重复的值，删除重复的值
DELETE *
FROM ZDJZ_DIS
WHERE NAME IN (select NAME from ZDJZ_DIS group by NAME having count(NAME) >1);
上面的做法会删除掉所有的相同的值，包括你想要的，只要重复就删除

DELETE *
FROM ZDJZ_DIS
WHERE ID in (select min(ID) from ZDJZ_DIS group by NAME having count(NAME)>1);
1有没有重复的某项值 2如果有的话，选择ID最小的那个

结合起来
DELETE *
FROM ZDJZ_DIS
WHERE NAME IN (select NAME from ZDJZ_DIS group by NAME having count(NAME) >1)
and ID not in (select min(ID) from ZDJZ_DIS group by NAME having count(NAME)>1);

SQL中删除同一字段中重复的值

标签：

热心网友时间：2022-04-08 12:37

用distinct
来去重，用法如下：
select
distinct
name
from
table，name是字段，table是表
多个字段用逗号分隔开就可以了
select
distinct
name,
id
from
table