php - 返回带有 union inside 查询的查询结果

Question

我的数据库中有 3 个这样的表

表格可用性

availability_id | date       | price | room_id | closed
-------------------------------------------------------
        1       | 2017-01-24 |   75  |  8      | 0
        2       | 2017-01-24 |   95  |  9      | 0
        3       | 2017-01-25 |   80  | 73      | 0
        4       | 2017-01-25 |   70  | 65      | 0
        5       | 2017-01-26 |   85  | 42      | 0
        6       | 2017-01-26 |   65  | 21      | 0

表offer_day

plan_id | offer_id date | price      | room_id |    | closed 
------------------------------------------------------------
 1      |       12      | 2017-01-24 |   70    |  8 |   0
 2      |       23      | 2017-01-24 |   75    |  9 |   0
 3      |       12      | 2017-01-25 |   70    |  8 |   1
 3      |       14      | 2017-01-25 |   70    |  8 |   0
 4      |       34      | 2017-01-25 |   75    |  9 |   0
 5      |       43      | 2017-01-25 |   80    | 73 |   0   
 6      |       54      | 2017-01-25 |   85    | 65 |   0 
 7      |       65      | 2017-01-26 |   75    | 42 |   0
 8      |       44      | 2017-01-26 |   70    | 21 |   0

表package_day

package_id | date       | price | room_id | closed
--------------------------------------------------
    1      | 2017-01-24 |  120  |   8     | 0
    2      | 2017-01-24 |  125  |   9     |  0
    3      | 2017-01-25 |  135  |  73     | 0
    4      | 2017-01-25 |  130  |  65     | 0
    5      | 2017-01-26 |  125  |  42     | 0 
    5      | 2017-01-26 |  120  |  21     | 0 

我有这样的查询:

SELECT a.price 
FROM availability a
WHERE a.closed = 0 AND a.date >= '2017-01-24' AND a.date <= DATE_SUB('2017-01-26', INTERVAL 1 DAY)

UNION

SELECT 0.price 
FROM offer_day o
WHERE o.closed = 0 AND o.date >= '2017-01-24' AND o.date <= DATE_SUB('2017-01-26', INTERVAL 1 DAY)

UNION

SELECT p.price 
FROM package_day p
WHERE p.closed = 0 AND p.date >= '2017-01-24' AND p.date <= DATE_SUB('2017-01-26', INTERVAL 1 DAY)

如果我运行该查询，我将获得close = 0的所有行。正如您在表 offer_day 中看到的，close 列中的值为 1。

如果相同 room_id 和相同 offer_id 中的 close 列中的任何行包含值 1，我不想显示结果。

例如，您可以在表 offer_day 中看到 room_id 8 有两个日期“2017-01-24”和“2017-01-25”以及两个offer_id 12 和 14 在日期“2017-01-25”中，已关闭 中为 1，offer_id 8 中为 1。我不想显示 room_id 8 和 offer_id 12(如果任何行包含值 1)

我怎样才能做到这一点？

谢谢。

Answer 1

如果您不需要空间，可以使用以下查询

SELECT a.price 
FROM availability a
WHERE a.closed = 0 AND a.date >= '2017-01-24' AND a.date <= DATE_SUB('2017-01-26', INTERVAL 1 DAY) and a.room_id NOT IN (select room_id FROM availability WHERE closed = 1 AND date >= '2017-01-24' AND date <= '2017-01-26')

UNION

SELECT o.price 
FROM offer_day o
WHERE o.closed = 0 AND o.date >= '2017-01-24' AND o.date <= DATE_SUB('2017-01-26', INTERVAL 1 DAY) and o.room_id NOT IN (select room_id FROM offer_day WHERE closed = 1 AND date >= '2017-01-24' AND date <= '2017-01-26')

UNION

SELECT p.price 
FROM package_day p
WHERE p.closed = 0 AND p.date >= '2017-01-24' AND p.date <= DATE_SUB('2017-01-26', INTERVAL 1 DAY) and p.room_id NOT IN (select room_id FROM package_day WHERE closed = 1 AND date >= '2017-01-24' AND date <= '2017-01-26')

你可以看到如果关闭=1我得到它的房间ID并在房间ID中不使用它。现在你得到答案了吗？