[英]INNER JOIN shows only first row in table
我的数据库中有以下数据:
scu_banks:
---------------------------------
| id | type | name |
|-------------------------------|
| 1 | 1 | One |
| 2 | 1 | Two |
| 3 | 2 | Three |
| 4 | 3 | Four |
---------------------------------
scu_statement:
---------------------------------
| id | code | mutation |
|-----------------------------------|
| 1 | 1 | 100 |
| 2 | 1 | 200 |
| 3 | 2 | 500 |
| 4 | 1 | 500 |
-------------------------------------
我想要做的是我要选择表scu_banks
所有行,并显示突变的总和。 数据应表示为:
--------------------------------------------------------------
| scu_banks.type | scu_banks.name | total | scu_banks.id |
--------------------------------------------------------------
| 1 | One | € 800.00 | 1 |
| 1 | Two | € 500.00 | 2 |
| 2 | Three | € 0.00 | 3 |
| 3 | Four | € 0.00 | 4 |
--------------------------------------------------------------
当我运行sql语句时,我得到以下数据:
---------------------------------------------------------------
| scu_banks.type | scu_banks.name | total | scu_banks.id |
--------------------------------------------------------------
| 1 | One | € 1300.00 | 1 |
---------------------------------------------------------------
我在这种情况下获得的数据不正确。 €1300.00表示表scu_statement
中所有突变的scu_statement
。 该语句也不会显示数据库中的其他行。
有人知道我的sql语句出了什么问题吗?
这是我的sql语句:
SELECT scu_banks.type,
scu_banks.name,
CONCAT('€ ', FORMAT(IFNULL(SUM(scu_statement.mutations), 0),2)) AS total,
scu_banks.id
FROM scu_banks
INNER JOIN scu_statement
ON scu_banks.id = scu_statement.code
在子查询中进行汇总,然后将其加入银行。
SELECT b.type "scu_banks.type",
b.name "scu_banks.name",
concat('€ ', format(coalesce(x.mutation, 0), 2)) "total",
b.id "scu_banks.id"
FROM scu_banks b
LEFT JOIN (SELECT s.code,
sum(s.mutation) mutation
FROM scu_statement s
GROUP BY s.code) x
ON x.code = b.id;
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