将两行合并为一行mysql

Question

这是我的表架构

id | name | number | status | logtime | logdate
 1    John    1001     in     8:00 AM   10/01/2016
 2    John    1001     out    5:00 PM   10/01/2016
 3    Carl    1002     in     8:01 AM   10/01/2016
 4    John    1001     in     8:00 AM   10/02/2016
 5    John    1001     out    5:00 PM   10/02/2016

以及如何将同一个logdate的两行合并为一个，结果如下所示

name | number | time_in | time_out | logdate
John    1001    8:00 AM   5:00 PM    10/01/2016
John    1001    8:00 AM   5:00 PM    10/02/2016
Carl    1002    8:01 AM     NULL     10/01/2016

我在查询中使用了CASE语法，但结果与想要的结果不一样。当然，我的查询有问题。这是我的查询btw：

SELECT
   number,
   name,
   CASE status WHEN 'in' THEN logtime END AS time_in,
   CASE status WHEN 'out' THEN logtime END AS time_out,
   LogDate
FROM
   tbl_attendanceraw
Group by logdate

TIA！

Answer 1

您想要条件聚合：

SELECT number, name,
       MAX(CASE status WHEN 'in' THEN logtime END) AS time_in,
       MAX(CASE status WHEN 'out' THEN logtime END) AS time_out,
       LogDate
FROM tbl_attendanceraw
Group by logdate, number, name;