Php 选择最高和最低日期
我现在有一个这样的问题:Php 选择最高和最低日期,php,mysql,sql,date,Php,Mysql,Sql,Date,我现在有一个这样的问题: SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs` FROM dailyMessage INNER JOIN `psttodo-uit` ON dailyMessage.Code = `psttodo-uit`.`Hostess Code` WHERE Code = "010" DATE TAG
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
DATE TAG VALUE addedTs
4 April calls 3 2014-04-04 20:32:39
4 April endTS 2014-04-04 22:40:55 2014-04-04 22:40:55
4 April kmstart 32 2014-04-04 18:34:37
4 April kmstop 34434334 2014-04-04 18:35:30
4 April startTS 2014-04-04 18:35:00 2014-04-04 18:35:00
4 April visits 6 2014-04-04 22:40:53
5 April endTS 2014-04-05 01:37:41 2014-04-05 01:37:41
5 April kmstart 30 2014-04-05 01:37:41
5 April startTS 2014-04-05 01:13:25 2014-04-05 01:13:25
5 April visits 1 2014-04-05 01:13:23
7 April authorizations 4 2014-04-07 22:34:37
7 April calls 9 2014-04-07 23:18:28
7 April endTS 2014-04-07 23:35:32 2014-04-07 23:35:32
7 April kmstart 42 2014-04-07 18:10:43
7 April kmstop 55 2014-04-07 19:37:42
7 April startTS 2014-04-07 10:45:18 2014-04-07 10:45:18
7 April visits 6 2014-04-07 23:35:31
8 April endTS 2014-04-08 11:24:28 2014-04-08 11:24:28
8 April startTS 2014-04-08 11:24:28 2014-04-08 11:24:28
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs`, MAX(`afgewerkt tablet datum`) AS `TimeSorE`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
我知道你会得到这样的结果:
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
DATE TAG VALUE addedTs
4 April calls 3 2014-04-04 20:32:39
4 April endTS 2014-04-04 22:40:55 2014-04-04 22:40:55
4 April kmstart 32 2014-04-04 18:34:37
4 April kmstop 34434334 2014-04-04 18:35:30
4 April startTS 2014-04-04 18:35:00 2014-04-04 18:35:00
4 April visits 6 2014-04-04 22:40:53
5 April endTS 2014-04-05 01:37:41 2014-04-05 01:37:41
5 April kmstart 30 2014-04-05 01:37:41
5 April startTS 2014-04-05 01:13:25 2014-04-05 01:13:25
5 April visits 1 2014-04-05 01:13:23
7 April authorizations 4 2014-04-07 22:34:37
7 April calls 9 2014-04-07 23:18:28
7 April endTS 2014-04-07 23:35:32 2014-04-07 23:35:32
7 April kmstart 42 2014-04-07 18:10:43
7 April kmstop 55 2014-04-07 19:37:42
7 April startTS 2014-04-07 10:45:18 2014-04-07 10:45:18
7 April visits 6 2014-04-07 23:35:31
8 April endTS 2014-04-08 11:24:28 2014-04-08 11:24:28
8 April startTS 2014-04-08 11:24:28 2014-04-08 11:24:28
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs`, MAX(`afgewerkt tablet datum`) AS `TimeSorE`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
现在我还要从psttodo表中选择最高日期。这就是我想做的:
在pstodo-uit
表中有一个Hostess-code
(==我的WHERE子句中的代码
)。datetypedatetime
表中还有一个afgewerkt tablet datum
字段
日期变化如下:
2014-04-04 11:41:22
2014-04-03 17:20:01
2014-04-01 15:12:08
2014-04-07 22:20:47
2014-04-08 11:21:18
现在,当我进行查询时,我想选择特定日期的最长时间。我这样试过:
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
DATE TAG VALUE addedTs
4 April calls 3 2014-04-04 20:32:39
4 April endTS 2014-04-04 22:40:55 2014-04-04 22:40:55
4 April kmstart 32 2014-04-04 18:34:37
4 April kmstop 34434334 2014-04-04 18:35:30
4 April startTS 2014-04-04 18:35:00 2014-04-04 18:35:00
4 April visits 6 2014-04-04 22:40:53
5 April endTS 2014-04-05 01:37:41 2014-04-05 01:37:41
5 April kmstart 30 2014-04-05 01:37:41
5 April startTS 2014-04-05 01:13:25 2014-04-05 01:13:25
5 April visits 1 2014-04-05 01:13:23
7 April authorizations 4 2014-04-07 22:34:37
7 April calls 9 2014-04-07 23:18:28
7 April endTS 2014-04-07 23:35:32 2014-04-07 23:35:32
7 April kmstart 42 2014-04-07 18:10:43
7 April kmstop 55 2014-04-07 19:37:42
7 April startTS 2014-04-07 10:45:18 2014-04-07 10:45:18
7 April visits 6 2014-04-07 23:35:31
8 April endTS 2014-04-08 11:24:28 2014-04-08 11:24:28
8 April startTS 2014-04-08 11:24:28 2014-04-08 11:24:28
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs`, MAX(`afgewerkt tablet datum`) AS `TimeSorE`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
但后来我发现:
4 April calls 3 2014-04-04 20:32:39 2014-04-09 11:49:42
两个问题:
- 我只得到一个结果
- 日期不是4月4日
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`, tag AS `TAG`, value AS `VALUE`, addedTs as `addedTs`, MAX(`afgewerkt tablet datum`) AS `TimeSorE`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
GROUP BY DATE_FORMAT(`Datum`, '%e %M')
给我这个:
4 April calls 3 2014-04-04 20:32:39 2014-04-09 15:46:04
5 April endTS 2014-04-05 01:37:41 2014-04-05 01:37:41 2014-04-09 15:46:04
7 April authorizations 4 2014-04-07 22:34:37 2014-04-09 15:46:04
8 April endTS 2014-04-08 11:24:28 2014-04-08 11:24:28 2014-04-09 15:46:04
但是我需要所有的标签
如果需要将结果集作为单独的行,请尝试以下操作
SELECT A.DATE ,A.CODE,TAG,addedTs,TimeSorE
(
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`,dailyMessage.Code AS CODE
MAX(`afgewerkt tablet datum`) AS `TimeSorE`
FROM dailyMessage
INNER JOIN `psttodo-uit`
ON dailyMessage.Code = `psttodo-uit`.`Hostess Code`
WHERE Code = "010"
GROUP BY DATE_FORMAT(`Datum`, '%e %M')
) A , dailyMessage B
WHERE
A.CODE = B.CODE AND
A.DATE = B. DATE_FORMAT(`Datum`, '%e %M')
这对我来说绝对有效:
SELECT
DATE_FORMAT(`Date`, '%e %M') AS `DATE`,
tag AS `TAG`,
value AS `VALUE`,
addedTs as `addedTs`,
MAX(`afgewerkttabletdatum`) AS `TimeSorE`
FROM Test
GROUP BY DATE_FORMAT(`Date`, '%e %M')
以下是一个例子:
我认为这会奏效:
SELECT DATE_FORMAT(`Datum`, '%e %M') AS `DATE`,
tag AS `TAG`,
value AS `VALUE`,
addedTs AS `addedTs`,
t2.`TimeSorE`
FROM dailyMessage
INNER JOIN (SELECT `Hostess Code`,
MAX(`afgewerkt tablet datum`) AS `TimeSorE`
FROM `psttodo-uit`
GROUP BY `Hostess Code`) t2 ON dailyMessage.Code = t2.`Hostess Code`
WHERE Code = "010"
使用MAX()和MIN()表示日期您只需要将GROUP BY添加到上一个查询中,例如添加
GROUP BY tag
。仍然会给我一个结果。。。只有带有MAX date…GROUP BY子句的行必须包含SELECT list中的所有列,或者这些列必须在聚合函数中。我错了,我指的是标准SQL,但MySQL扩展了GROUP BY子句,以便在非聚合列上进行分组。这只给了我4行(4,5,7,8)。我需要一天中的所有行,因为它们有不同的标签。因此,对于4月4日,我需要有6行(就像在我的主题中一样),每个MAX_日期相同。我不需要addedTs MAX,而是afgewerkt平板电脑DATA MAX。我添加了它,并将addedTs添加到GROUP BY。我得到的最大时间总是相同的,这是不正确的。从GROUPBY子句中删除除一列以外的所有列,然后重试