Question

我有一个mysql查询，我希望按名称分组几天。现在，它只是按名称分组一天，我不知道问题在哪里，你能帮忙吗。

SELECT attendance.username,
       attendance.date,
       attendance.time_in,
       attendance.time_out,
       attendance_count.count_time,
       attendance_count.appendix
FROM attendance
LEFT JOIN attendance_count
    ON (attendance.date=attendance_count.date)
        AND (attendance.username = attendance_count.username)
WHERE (STR_TO_DATE(attendance.date, '%m/%d/%Y')
    BETWEEN STR_TO_DATE('01/21/2013', '%m/%d/%Y')
        AND STR_TO_DATE('02/20/2013', '%m/%d/%Y'))
GROUP BY attendance.username

Answer 1

'有些日子'是不可理解的。请提供更多相关信息。

SELECT attendance.username,
       attendance.date,
       attendance.time_in,
       attendance.time_out,
       attendance_count.count_time,
       attendance_count.appendix
FROM attendance
LEFT JOIN attendance_count
    ON (attendance.date=attendance_count.date)
    AND (attendance.username = attendance_count.username)
WHERE (STR_TO_DATE(attendance.date, '%m/%d/%Y')
    BETWEEN STR_TO_DATE('01/21/2013', '%m/%d/%Y')
    AND STR_TO_DATE('02/20/2013', '%m/%d/%Y'))
GROUP BY attendance.username , DAY(attendance.date)

mysql查询在某些天内无法按名称分组

1 个答案: