Mysql 将一周内的查找转换为一个月？

我有一个每周获取和分组结果的查找：

SELECT
COUNT(IF(YEARWEEK(Submitted, 1) = YEARWEEK(NOW(), 1), 1, null)) AS Bookings,
COUNT(IF(YEARWEEK(Submitted, 1) = YEARWEEK(NOW()- INTERVAL 1 WEEK, 1), 1, null)) AS LastWeekBookings
FROM Bookings

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是否有一个月替代YEARWEEK，可以让一年、一个月和上一个月计算一个月的预订量？

没有简单的函数可以像

YEARWEEK（）合并一年和一周那样合并一年和一个月。因此，只需分别比较两者。并减去
间隔1个月
，而不是
间隔1周

SELECT
COUNT(IF(YEAR(Submitted) = YEAR(NOW()) AND MONTH(Submitted) = MONTH(NOW()), 1, null)) AS Bookings,
COUNT(IF(YEAR(Submitted) = YEAR(NOW() - INTERVAL 1 MONTH) AND MONTH(Submitted) = MONTH(NOW() - INTERVAL 1 MONTH), 1, null)) AS LastMonthBookings
FROM Bookings

您可以使用该功能确定当前月份或上个月：

SELECT
  SUM(LAST_DAY(Submitted) = LAST_DAY(NOW()) AS Bookings,
  SUM(LAST_DAY(Submitted) = LAST_DAY(NOW()- INTERVAL 1 MONTH)) AS LastMonthBookings
FROM Bookings

YEAR（Submitted）=YEAR（NOW（））和MONTH（Submitted）=MONTH（NOW（））
我已经接受了这个答案，因为我假设当年份发生变化时，它不会出错，而当你到1月份时，分别比较月份和年份，从1月起减去一个月将查找同一年12月的结果？@BN83两个答案都不会弄乱日期。对不起，是的，我错过了一年中减去一个月的部分，假设如果是1月，也会减去一年。