Question

我有一个表格testing（name，money），在这里我必须返回一个结果，其中所有正数的钱都被存入存款，而负数的钱将被提取。在下面的查询中显示：“子查询只允许返回单个列。”

SELECT name, SUM(money) AS "deposit"
FROM testing
where money > 0 in
    (SELECT name, SUM(abs(money)) AS "withdraw"
    FROM testing
    where money < 0 )
GROUP BY name;

p.s：我尝试了没有“ In”的情况，但也无法正常工作

Answer 1

SELECT name, 
       SUM(case when money > 0 then money else 0 end) AS deposit,
       SUM(case when money < 0 then money else 0 end) AS withdraw
FROM testing
GROUP BY name;

Answer 2

您可以使用以下SQL语句

SELECT name, SUM(money) AS "deposit"
FROM testing
where money > 0
AND money in
(
    SELECT SUM(abs(money)) AS "withdraw"
    FROM testing
    where money < 0 
)
GROUP BY name;

让我知道它是否有效！：）

带有两个where子句的子查询

2 个答案: