DAYSOFWEEK 之间的 SQL
我进行了广义搜索,查找一周中不同日期的平均价格。问题是我不知道如何要求一个奇怪的范围。 1-7 工作正常,(周一至周日),但如果用户将周日传递到周二......即 7-2 它不起作用。
1-7(1,2,3,4,5,6,7) 7-2 (7,1,2)
等。
除了 BETWEEN 之外,我还能如何传递更智能的范围或其他东西?
SELECT item_id, DAYOFWEEK(bookdate) as date, bookdate, AVG(price) AS price
FROM `availables` WHERE (item_id = 16 and DAYOFWEEK(bookdate) BETWEEN 2 AND 7)
GROUP BY DAYOFWEEK(bookdate)
I have a generalized search where I'm looking up average prices for the various days of the week. The problem is I'm not sure how to ask for an odd range. 1-7 works fine, (monday-sunday), but if the user passes a sunday to a tuesday... ie 7-2 it doesn't work.
1-7 (1,2,3,4,5,6,7)
7-2 (7,1,2)
etc.
How else can I pass a range that is more intelligent or something besides BETWEEN?
SELECT item_id, DAYOFWEEK(bookdate) as date, bookdate, AVG(price) AS price
FROM `availables` WHERE (item_id = 16 and DAYOFWEEK(bookdate) BETWEEN 2 AND 7)
GROUP BY DAYOFWEEK(bookdate)
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也许您正在寻找的是 IN 语法:
Perhaps what you are looking for is the IN syntax:
使用“in”子句执行此操作,如下所示:dayofweek(bookdate) in (1,2,7)
这也允许非连续日期的灵活性(例如,仅选择星期一和星期五的记录)
Do it with an 'in' clause, like this: dayofweek(bookdate) in (1,2,7)
This also allows the flexibility of non-continuous dates (select records for Monday and Friday only, for example)