mysql - 从子查询发送列

Question

有两个表，一个是事务，另一个是客户。我收到多行 customerid 和服务时间，但我想要客户名称(位于客户表中)和服务时间。所以我尝试了下面的查询，但它不起作用。

select name,service_time from CUSTOMER,TRANSACTION
WHERE id IN 
(
    select customer_id,service_time from TRANSACTION 
    where  service_date='$date' and employee_id='$employee_id'
);

Answer 1

使用JOIN

SELECT c.name, t.service_time 
  FROM CUSTOMER AS c
  JOIN TRANSACTION AS t ON t.customer_id = c.id
 WHERE t.service_date = '$date' 
   AND employee_id = '$employee_id'

引用:

• MySQL Join Syntax
• Data Visualization with JOINS