php - mysql 按天名排序

Question

我如何按日期名称在mysql中排序，即：星期日，星期一，星期二，星期三等等

SELECT 
    DAYNAME(dl.bookingDate) AS dayName, COUNT(dg.idDiary) AS totalBooked
FROM
    diary_list dl, diary_group dg
WHERE
    dl.idDiary = dg.idDiary AND dg.idService != 0 AND dl.status = 3
GROUP BY 
    dayName
ORDER BY 
    dayName ???

Answer 1

您需要将该功能添加DAYOFWEEK到您的GROUP BYand ORDER BY：

GROUP BY DAYOFWEEK(dl.bookingDate)
ORDER BY DAYOFWEEK(dl.bookingDate)

您可能还想研究使用显式 ANSI 标准JOIN语法。

SELECT 
    DAYNAME(dl.bookingDate) AS dayName, COUNT(dg.idDiary) AS totalBooked
FROM
    diary_list dl
JOIN diary_group dg
    ON dl.idDiary = dg.idDiary
WHERE
    dg.idService != 0 AND dl.status = 3
GROUP BY 
    DAYOFWEEK(dl.bookingDate)
ORDER BY 
    DAYOFWEEK(dl.bookingDate)

Answer 2

您可以制定自己的订单标准：

ORDER BY FIELD(DAY , '3', '4', '5', '6', '7','1', '2')

在你的情况下：

ORDER BY FIELD(DAY , '7','1', '2', '3', '4', '5', '6')

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