最常見的工作日查詢

Question

有這個疑問：

SELECT HOUR(DATE) AS hr, COUNT(*) AS cnt 
FROM users 
GROUP BY hr 
ORDER BY cnt DESC 

日期是一個DATETIME場和上面的查詢顯示我的日期字段最常見小時。

我試圖改善它，但不知道如何做到這一點，我想按星期幾和每週一天內的大多數常見小時分解它。

Answer 1

嘗試此查詢 -

SELECT 
    DAYOFWEEK(DATE) AS wd, 
    HOUR(DATE) AS hr, 
    COUNT(*) AS cnt 
FROM 
users 
GROUP BY 
    wd, hr 
ORDER BY 
    cnt DESC 

---

SELECT 
    DATE_FORMAT(DATE, '%a') AS wd, -- or DATE_FORMAT(DATE, '%W') 
    HOUR(DATE) AS hr, 
    COUNT(*) AS cnt 
FROM 
users 
GROUP BY 
    wd, hr 
ORDER BY 
    cnt DESC 

Answer 2

讓我知道，如果下面的工作：

SELECT dayname(DATE) as week_day,HOUR(DATE) AS hr, COUNT(*) AS cnt 
FROM users 
GROUP BY week_day, hr ORDER BY cnt DESC