从另一个表中为mysql中第一个表中的每一行选择对应的行

Question

我有一个名为 users 的表，另一个名为提现的表

如何为用户的每个提款请求选择一行，并在用户表中选择其银行详细信息。

重要提示：用户表中的用户名对于每一行都是唯一的。这对应于提现表中的用户ID

在这里， 用户表

+-----------+-----------------+-------------+
| user_name | bank_ac         | ifsc        |
+-----------+-----------------+-------------+
| H6426012  | 456456 | ifsc6544 |
+-----------+-----------------+-------------+

提取表格

+----------+--------+--------+
| userid   | amount | status |
+----------+--------+--------+
| H6426012 | 300.00 |      1 |
| H6426012 | 150.00 |      1 |
| H6426012 | 200.00 |      1 |
+----------+--------+--------+

这是我正在使用的查询：

select withdraws.userid 
     , withdraws.amount
     , users.user_name
     , users.ifsc
     , users.bank_ac 
  from withdraws 
  JOIN users 
    on withdraws.userid = users.user_name 
 where withdraws.status = 1

这是我期望的结果：

我希望得到这个结果

+----------+--------+--------++----------+--------+--------+
| userid   | amount | status |user_name   | ifsc | bank_ac |
+----------+--------+--------++----------+--------+--------+
| H6426012 | 300.00 |      1 | H6426012 | ifsc6544 | 456456 |
| H6426012 | 150.00 |      1 | H6426012 | ifsc6544 | 456456|
| H6426012 | 200.00 |      1 | H6426012 | ifsc6544 | 456456 |
+----------+--------+--------++----------+--------+--------+

但是我得到了这个结果

+----------+--------+--------++----------+--------+--------+
| userid   | amount | status |user_name   | ifsc | bank_ac |
+----------+--------+--------++----------+--------+--------+
| H6426012 | 300.00 |      1 | NULL      | NULL    | NULL |
| H6426012 | 150.00 |      1 | NULL      | NULL    | NULL|
| H6426012 | 200.00 |      1 | NULL      | NULL    | NULL |
+----------+--------+--------++----------+--------+--------+

Answer 1

我运行了相同的查询，但效果很好，我也创建了相同的查询，但没有任何连接，而且效果也很好... 我正在使用SQL Server Management Studio V17.9。

Answer 2

首先在您的用户模式/表上将用户名更改为 user_id ，以免将来使您感到困惑。然后，如下所示修改您的查询，即可正常运行

select users.userid as user_id, 
     withdraws.amount as amount,
     withdraws.status as status
     users.ifsc as ifsc
     users.bank_ac as bank_ac
  from withdraws 
  JOIN users 
    on withdraws.userid = users.userid 
 where withdraws.status = 1