mysql - 选择一年中的所有日期

Question

我有一个日期列表，我希望在我的应用程序的日历小部件中启用它们。日历小部件允许我只提供需要禁用的日期列表。

我可以将上述日期转换为格式 2015-3-6,2015-3-8,2015-3-7,2015-5-4,2015-5-7,2015-5-12,2015-6- 16、2015-7-2、2015-10-19

但是我需要以上述格式在日历中获取除上述日期之外的其余日期。我不知道我怎么得到。非常感谢我如何实现这一目标的任何想法

Answer 1

桌子

CREATE TABLE Available
    (`IsAvailable` datetime);

INSERT INTO Available
    (`IsAvailable`)
VALUES
    ('2015-03-06 00:00:00'),        ('2015-03-08 00:00:00'),
    ('2015-03-07 00:00:00'),        ('2015-05-04 00:00:00'),
    ('2015-05-07 00:00:00'),        ('2015-05-12 00:00:00'),
    ('2015-06-16 00:00:00'),        ('2015-07-02 00:00:00'),
    ('2015-10-19 00:00:00');

SQL 小提琴演示

select y2015.selected_date,
       IF(Available.`IsAvailable` IS NULL, FALSE, TRUE) as Available
from 
     (select adddate('2015-01-01', t2.i*100 + t1.i*10 + t0.i) selected_date 
      from
         (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t0,
         (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t1,
         (select 0 i union select 1 union select 2 union select 3 union select 4 union select 5 union select 6 union select 7 union select 8 union select 9) t2
     ) y2015
LEFT JOIN Available
       ON y2015.selected_date = Available.`IsAvailable`   
where y2015.selected_date < '2016-01-01'

输出

| selected_date | Available |
|---------------|-----------|
|    2015-03-06 |         1 |   \
|    2015-03-08 |         1 |    \
|    2015-03-07 |         1 |    |
|    2015-05-04 |         1 |    \
|    2015-05-07 |         1 |    /  Those are in Avaliable table
|    2015-05-12 |         1 |    |
|    2015-06-16 |         1 |    |
|    2015-07-02 |         1 |    /
|    2015-10-19 |         1 |   /
|    2015-01-01 |         0 |
|    2015-01-02 |         0 |
|    2015-01-03 |         0 |
|    2015-01-04 |         0 |
|    2015-01-05 |         0 |
|    2015-01-06 |         0 |
|    2015-01-07 |         0 |
....
|    2015-12-31 |         0 |

   Record Count: 365;