题解 删除emp_no重复的记录,只保留最小的id对应的记录
删除emp_no重复的记录,只保留最小的id对应的记录。
https://www.nowcoder.com/practice/3d92551a6f6d4f1ebde272d20872cf05
with t as(
select min(id)
from titles_test
group by emp_no
) /*不能边查询边删除,需要先创建临时表*/
delete from titles_test
where id not in(select * from t); /*必须有分号
删除语句:
delete from tablename
where condition
*/

