我必须在我的表中添加列(check_in 和 checkout)。它们都具有这种格式 dd-mm-yyyy
。我想检查我的两个参数(输入)之间是否有可用的日期。
我试过这样的:
select * from rezervare where date(check_out) > date('my_checkout_input')
但这只适用于少数情况。如果我在 12-03-2015 - 15-03-2015 之间预订,在 17-03-2015 和 20-03-2015 之间预订。它不会将16-03-2015之间的日期作为免费日期。你能给我一些想法吗?
最佳答案
create table rezervare (
id int auto_increment,
check_in varchar(10),
checkout varchar(10),
primary key (id)
);
insert into rezervare values
(null, '12-03-2015', '12-03-2015'),
(null, '13-03-2015', '13-03-2015'),
(null, '14-03-2015', '14-03-2015'),
(null, '15-03-2015', '15-03-2015'),
(null, '16-03-2015', '16-03-2015'),
(null, '17-03-2015', '17-03-2015'),
(null, '19-03-2015', '19-03-2015'),
(null, '20-03-2015', '20-03-2015')
;
select * from rezervare;
+----+------------+------------+
| id | check_in | checkout |
+----+------------+------------+
| 1 | 12-03-2015 | 12-03-2015 |
| 2 | 13-03-2015 | 13-03-2015 |
| 3 | 14-03-2015 | 14-03-2015 |
| 4 | 15-03-2015 | 15-03-2015 |
| 5 | 16-03-2015 | 16-03-2015 |
| 6 | 17-03-2015 | 17-03-2015 |
| 7 | 19-03-2015 | 19-03-2015 |
| 8 | 20-03-2015 | 20-03-2015 |
+----+------------+------------+
如果您的架构与此相同,则不能使用日期函数,因为:
select id, date(check_in), date(checkout) from rezervare ;
+----+----------------+----------------+
| id | date(check_in) | date(checkout) |
+----+----------------+----------------+
| 1 | NULL | NULL |
| 2 | NULL | NULL |
| 3 | NULL | NULL |
| 4 | NULL | NULL |
| 5 | NULL | NULL |
| 6 | NULL | NULL |
| 7 | NULL | NULL |
| 8 | NULL | NULL |
+----+----------------+----------------+
但是你可以使用 between,在我的例子中它工作正常:
select * from rezervare where checkout between '12-03-2015' and '15-03-2015';
+----+------------+------------+
| id | check_in | checkout |
+----+------------+------------+
| 1 | 12-03-2015 | 12-03-2015 |
| 2 | 13-03-2015 | 13-03-2015 |
| 3 | 14-03-2015 | 14-03-2015 |
| 4 | 15-03-2015 | 15-03-2015 |
+----+------------+------------+
select * from rezervare where checkout > '14-03-2015';
+----+------------+------------+
| id | check_in | checkout |
+----+------------+------------+
| 4 | 15-03-2015 | 15-03-2015 |
| 5 | 16-03-2015 | 16-03-2015 |
| 6 | 17-03-2015 | 17-03-2015 |
| 7 | 19-03-2015 | 19-03-2015 |
| 8 | 20-03-2015 | 20-03-2015 |
+----+------------+------------+
但真正的方法 - 更改表并使用正确的日期类型。
关于php - 从mysql查询中提取特定日期,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/29195303/