mysql에서 subquery를 쓰는 방법

Asked 6 months ago, Updated 6 months ago, 91 views

샘플 예제는 이렇구요.

date tomato phone book pen
2022-05-15 2 2 3 1
2022-05-15 3 3 3 2

 

이렇게 결과가 나왔으면 합니다. 

date tomato phone book pen
2022-05-15 5 5 6 3

 

제가 해본 건 이렇게 해봤는데요.

insert into sales.copy 
select date, 
       sum(tomato), 
       sum(phone), 
       sum(book), 
       sum(pen) 
from copy 
where date = '2022-05-15';
GROUP BY date

delete from sales.copy
where date = '2022-05-15' and tomato < ( select max(tomato) from sales.copy where date = '2022-05-15' )

 

이 부분이 잘 안됩니다.

delete from sales.copy
where date = '2022-05-15' and tomato < ( select max(tomato) from sales.copy where date = '2022-05-15' ); 

mysql

2022-05-23 09:59

1 Answers

이렇게 해보세요.

delete from sales.copy WHERE date = '2022-05-15' AND tomato < ( select MAX(tomato) FROM (SELECT tomato from sales.copy where date = '2022-05-15') AS temp );


2022-05-23 09:59

If you have any answers or tips


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