我想从表中选择所有重复项:
SELECT * FROM people HAVING (count(*) OVER (PARTITION BY name)) > 1;
不幸的是,我得到了错误:
Error Code: 3593. You cannot use the window function 'count' in this context.
一种不太优雅的解决方案是:
SELECT
*
FROM
people
WHERE
code IN (SELECT
name
FROM
people
GROUP BY name
HAVING COUNT(*) > 1);
如何重写我的第一个查询以使其正常工作?
答案 0 :(得分:1)
如果code
相同,则可以使用exists
:
select p.*
from people p
where exists (select 1 from people p1 where p1.name = p.name and p.code <> p1.code);
如果整个表没有任何身份列,如果code
列不具有身份特征,则使用身份列,那么您的方法可以在以下更新的查询中正常工作:
SELECT p.*
FROM people p
WHERE name IN (SELECT name FROM people GROUP BY name HAVING COUNT(*) > 1);