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[英]Sorting results of UNION query combining two tables by the table of origin
[英]Union all, combining query results
我有以下MySQL查询:
SELECT *
FROM bookings
WHERE record_id = 7 AND status = 'available' AND startdate >= '2015-05-02' AND startdate <= '2015-05-09'
UNION ALL
SELECT *
FROM bookings
WHERE record_id = 7 AND status = 'available' AND startdate >= '2015-05-11' AND startdate <= '2015-05-12'
是否可以组合这两个查询,而不是使用UNION ALL
?
您可以使用OR
运算符,如下所示
SELECT *
FROM bookings
WHERE record_id = 7
AND status = 'available'
AND ((startdate >= '2015-05-11' AND startdate <= '2015-05-12') or (startdate >= '2015-05-02' AND startdate <= '2015-05-09'))
这个工作:
SELECT *
FROM bookings
WHERE record_id = 7 AND status = 'available' AND
((startdate >= '2015-05-02' AND startdate <= '2015-05-09') or (startdate >= '2015-05-11' AND startdate <= '2015-05-12'))
您可以使用OR
运算符来获取两个日期范围:
SELECT *
FROM bookings
WHERE record_id = 7 AND
status = 'available' AND
((startdate >= '2015-05-02' AND startdate <= '2015-05-09') OR
(startdate >= '2015-05-11' AND startdate <= '2015-05-12'))
离开这部分:
SELECT * FROM bookings WHERE record_id = 7 AND status = 'available'
添加这个:
AND ((startdate >= '2015-05-02' AND startdate <= '2015-05-09') OR (startdate >= '2015-05-11' AND startdate <= '2015-05-12'))
如果第一个和条件或第二个条件得到真,OR条件将返回true
另外,对于您正在使用的那些和条件,您可能需要查看sql BETWEEN语句: http : //www.w3schools.com/sql/sql_between.asp
您也可以在第一部分之后执行此操作:
AND startDate >= '2015-05-02' AND startDate <= '2015-05-12' AND NOT startDate = '2015-05-10'
因为你正在使用硬编码日期,而你不需要的唯一一个是5月10日
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