我有以下查询。其目的是找出订购产品的时间,检查它们是否符合当天的条件,然后提供清单。
AND (
(NameType <> 'Salad' AND completeDate < DATE_FORMAT( NOW( ) , '%Y-%m-%d' ' 10:30:00' ) )
OR
(NameType = 'Salad' AND (
( DATE_FORMAT( completeDate , '%h:%i:%s' ) <= '14:00:00' )
AND DATE_ADD(DATE_FORMAT(completeDate,'%Y-(%m)-%d'), INTERVAL +1 DAY) < DATE_FORMAT(NOW(),'%Y-%m-%d')
)
)
OR
(NameType = 'Salad' AND (
( DATE_FORMAT( completeDate , '%h:%i:%s' ) > '14:00:00' )
AND DATE_ADD(DATE_FORMAT(completeDate,'%Y-(%m)-%d'), INTERVAL +2 DAY) < DATE_FORMAT(NOW(),'%Y-%m-%d')
)
)
)
逻辑:
If a Bagel is ordered before 10:30 it will arrive that day. If not it will arrive the next.
If a Salad is ordered before 14:00 it will arrive the next day. If after this, it will arrive in two working days.
(是的,我觉得我很疯狂!)
因此,当前日期为2015-05-06
这样一张桌子;
|ID|NameType| completeDate |
|1 |Salad |2015-05-05 13:00:00|
|2 |Salad |2015-05-04 19:00:00|
|3 |Bagel |2015-05-05 08:00:00|
|4 |Bagel |2015-05-05 11:00:00|
应该输出,
|ID|NameType| completeDate |
|1 |Salad |2015-05-05 13:00:00|
|3 |Bagel |2015-05-05 08:00:00|
然而它省略了沙拉/ ID 1!
这是如何与日期比较的一些东西吗?想知道是否将它们转换为字符串可能有所帮助。
答案 0 :(得分:1)
你在'%h:%i:%s'
使用了24小时的军事时间,但在'01:30:00'
中使用了%h的12小时常规时间(因此下午1:30将显示为'%H:%i:%s'
)。这样的格式化可能会有所帮助:
{{1}}
答案 1 :(得分:0)
问题与我如何比较两个字符串有关。
将它们转换为DATE
解决了这个问题。
AND (
(NameType <> 'Salad' AND completeDate < DATE_FORMAT( NOW( ) , '%Y-%m-%d' ' 10:30:00' ) )
OR
(NameType = 'Salad' AND (
( DATE_FORMAT( completeDate , '%H:%i:%s' ) <= '14:00:00' )
AND CAST(DATE_ADD(DATE_FORMAT(completeDate,'%Y-(%m)-%d'), INTERVAL +1 DAY) AS DATE) <= CAST(DATE_FORMAT(NOW(),'%Y-%m-%d') AS DATE)
)
)
OR
(NameType = 'Salad' AND (
( DATE_FORMAT( completeDate , '%H:%i:%s' ) > '14:00:00' )
AND CAST(DATE_ADD(DATE_FORMAT(completeDate,'%Y-(%m)-%d'), INTERVAL +2 DAY) AS DATE) <= CAST(DATE_FORMAT(NOW(),'%Y-%m-%d') AS DATE)
)
)
)