MySQL连接包含多个 View 值的多个选择语句

Question

我有一张包含所有详细信息的表格

+----------+------------+-----------+
| staff_id | date       | time      | 
+----------+------------+-----------+
|    1     | 2015-02-20 |    07:00  |  
|    2     | 2015-02-20 |    07:01  |  
|    3     | 2015-02-20 |    07:05  |  
|    1     | 2015-02-20 |    07:02  |  
|    1     | 2015-02-20 |    07:04  |  
+----------+--------------+---------+

另一个包含所有 OUT 详细信息的表

+----------+------------+-----------+
| staff_id | date       | time      | 
+----------+------------+-----------+
|    1     | 2015-02-20 |    13:00  |  
|    2     | 2015-02-20 |    13:45  |  
|    3     | 2015-02-20 |    13:45  |  
|    1     | 2015-02-20 |    13:47  |  
|    1     | 2015-02-20 |    13:48  |  
+----------+--------------+---------+

需要的结果是什么 进入时间、最小值和超时、最大值

+----------+------------+-----------+
| staff_id | date       | time IN   | Time Out
+----------+------------+-----------+
|    1     | 2015-02-20 |    07:00  | 13:48
|    2     | 2015-02-20 |    07:01  | 13:45

我在做什么

SELECT *
FROM
  (SELECT sai.staff_id AS staff_id_in,
          sai.date AS date_in,
          sai.time AS time_in,
          sai.ip4 AS ip4_in,
          sai.location_id AS location_id_in,
          '1' AS atd_in
   FROM staff_attendance_in sai
   ORDER BY staff_id ASC, time ASC) AS sub
GROUP BY staff_id_in,
         date_in
UNION
SELECT *
FROM
  (SELECT sao.staff_id AS staff_id_out,
          sao.date AS date_out,
          sao.time AS time_out,
          sao.ip4 AS ip4_out,
          sao.location_id AS location_id_out,
          '2' AS atd_out
   FROM staff_attendance_out sao
   ORDER BY time DESC) AS sub
GROUP BY staff_id_out,
         date_out

但我无法从查询生成 View ...也无法加入

Answer 1

试试这个:-

SELECT I.staff_id, I.date, MIN(I.time_IN), MAX(O.Time Out)
FROM IN I JOIN OUT O
ON I.staff_id = O.staff_id
GROUP BY I.staff_id, I.date;

我认为这可以帮助你。