每天

Question

SQL計數是否有可能在一個到達拍攝了COUNT（*），爲過去15天的每一天就像我得到了一天：

SELECT count(*) as total from users where `user_date_accountcreated` BETWEEN '2016-10-03 00:00:00' AND '2016-10-03 23:59:59' 

爲了避免每一個SQL請求天。

謝謝。

Answer 1

只要使用MySQL的日期函數：

SELECT ... 
WHERE u_d_a_c BETWEEN (now() - INTERVAL 15 DAY) AND now() 
GROUP BY year(u_d_a_c), month(u_d_a_c), day(u_d_a_c) 

Answer 2

一個簡單的方法是按日期：

SELECT date_format(`user_date_accountcreated`, "%y%m%d"), count(*) as total from users 
where `user_date_accountcreated` BETWEEN '2016-09-18 00:00:00' AND '2016-10-03 23:59:59' 
GROUP BY date_format(`user_date_accountcreated`, "%y%m%d") 

Answer 3

試試這個：

SELECT DATE_FORMAT(user_date_accountcreated, '%Y-%m-%d'), count(*) AS total 

    FROM users 

    WHERE 

    DATEDIFF(CURDATE(), user_date_accountcreated) BETWEEN 1 AND 15 

     GROUP BY DATE_FORMAT(user_date_accountcreated, '%Y-%m-%d')