mysql - 选择计算时间范围内的多个字段 - MYSQL

Question

我在计算时间范围内的多个字段时遇到问题。 我有下表:

# date, count, fb_user_count, email_user_count, reg_dt
'2015-10-27', '11', '6', '5', '2015-11-02 13:59:14'
'2015-10-26', '3', '1', '2', '2015-11-02 13:59:10'

我想获得每周的注册数量，如下所示:

# date, count, fb_user_count, email_user_count, reg_dt
'2015-11-02', '31', '16', '15', '2015-11-02 13:59:14'
'2015-11-09', '12', '6', '6', '2015-11-09 13:59:14'

和每月:

# date, count, fb_user_count, email_user_count, reg_dt
'2015-11', '131', 'x', 'y', '2015-11-02 13:59:14' (the last value is not so important)
'2015-12', '112', 'x', 'y', '2015-12-09 13:59:14'

我尝试了不同的方法，但我很难完成这项任务。任何帮助都会很棒。谢谢!

Answer 1

您可以使用 MySQL Date and Time functions WEEK()、MONTH() 和 YEAR() 来构建您的查询:

SELECT
    MIN(date),
    SUM(count),
    SUM(fb_user_count),
    SUM(email_user_count)
FROM visit
GROUP BY WEEK(date, 1); -- First day is Monday

SELECT
    CONCAT(YEAR(date), '-', MONTH(date)),
    SUM(count),
    SUM(fb_user_count),
    SUM(email_user_count)
FROM visit
GROUP BY YEAR(date), MONTH(date);