Question

我有这个查询连接满足条件的两个表：

SELECT * FROM order
JOIN reservations
ON order.reservationsID=reservations.ID
WHERE posname='Fixed'

从这个结果我需要从预订表中过滤到某些日期范围。如果我单独查询预订表（有年，月，块列），我会得到以下查询：

(SELECT * FROM reservations 
WHERE YEAR=2016 AND MONTH=11 AND BLOCK>1)
UNION
(SELECT * FROM reservations 
WHERE YEAR=2016 AND MONTH>11)
UNION
(SELECT * FROM reservations 
WHERE YEAR>2016)

如何将这两个查询合并为一个？任何指导都将不胜感激。

Answer 1

试试这个：

SELECT * FROM [order]
JOIN reservations ON [order].reservationsID=reservations.ID
WHERE posname='Fixed' AND ( (YEAR=2016 AND MONTH=11 AND BLOCK>1) OR
                            (YEAR=2016 AND MONTH>11) OR
                            (YEAR>2016) )

带有连接和多个联合的mySQL查询

1 个答案: