Question

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'

是否可以合并这两个查询，而不是使用UNION ALL？

Answer 1

您可以使用OR运算符代替

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'))

Answer 2

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'))

Answer 3

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'))

Answer 4

离开这部分：

SELECT * FROM bookings WHERE record_id = 7 AND status = 'available'

添加：

AND ((startdate >= '2015-05-02' AND startdate <= '2015-05-09') OR (startdate >= '2015-05-11' AND startdate <= '2015-05-12'))

如果第一个和条件得到真，或者第二个和条件

，则OR条件将返回true

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'

当你正在使用硬编码日期时，你不需要的唯一一个是5月10日

联合所有，结合查询结果

4 个答案: