Mysql 他以30分钟内的最后一项活动为基础开始了训练。正因为如此，会议似乎延长了30分钟。因此，从技术上讲，如果用户在24小时内每29分钟保存一次，那么会话将持续一天。没错，我不明白您希望从序列的一开始就开始。但是，只有当我使用你的原始帖子时，才能看到差异。对此，
Mysql 他以30分钟内的最后一项活动为基础开始了训练。正因为如此，会议似乎延长了30分钟。因此，从技术上讲，如果用户在24小时内每29分钟保存一次，那么会话将持续一天。没错，我不明白您希望从序列的一开始就开始。但是，只有当我使用你的原始帖子时，才能看到差异。对此，,mysql,sql,Mysql,Sql,他以30分钟内的最后一项活动为基础开始了训练。正因为如此，会议似乎延长了30分钟。因此，从技术上讲，如果用户在24小时内每29分钟保存一次，那么会话将持续一天。没错，我不明白您希望从序列的一开始就开始。但是，只有当我使用你的原始帖子时，才能看到差异。对此，我很抱歉。。。是的，我需要从每个新序列的开始使用，以便它捕获每个会话的“视图”。您是否尝试过新查询是“存储”新会话的时间戳，并使用该时间戳进行比较P看起来更好，谢谢！另一件让人们知道的事情是，您必须按user\u id（auto inc id）
他以30分钟内的最后一项活动为基础开始了训练。正因为如此，会议似乎延长了30分钟。因此，从技术上讲，如果用户在24小时内每29分钟保存一次，那么会话将持续一天。没错，我不明白您希望从序列的一开始就开始。但是，只有当我使用你的原始帖子时，才能看到差异。对此，我很抱歉。。。是的，我需要从每个新序列的开始使用，以便它捕获每个会话的“视图”。您是否尝试过新查询是“存储”新会话的时间戳，并使用该时间戳进行比较P看起来更好，谢谢！另一件让人们知道的事情是，您必须按
user\u idCREATE TABLE `user_has_saves` (
`user_id` int(9) unsigned NOT NULL,
`save_id` bigint(20) unsigned NOT NULL,
`sequence` int(11) unsigned NOT NULL,
PRIMARY KEY (`user_id`,`save_id`),
KEY `index_on_timestamp` (`sequence`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
INSERT INTO `user_has_saves` (`user_id`, `save_id`, `sequence`)
VALUES
(21, 5126897534, 1291232155),
(15, 3626385397, 1291238787),
(3, 839719945, 1291238821),
(3, 839719970, 1291241768),
(3, 839719977, 1291250458),
(3, 839720006, 1291264273),
(3, 839720007, 1291264290),
(3, 839720008, 1291264302),
(3, 839720020, 1291270475),
(4, 1054078902, 1291270475),
(4, 1054078903, 1291271012),
(4, 1054078916, 1291271268),
(3, 839720036, 1291271271),
(3, 839720037, 1291271296),
(4, 1054078919, 1291271394),
(4, 1054078920, 1291271595),
(3, 839720040, 1291271629),
(4, 1054078922, 1291271811),
(4, 1054078923, 1291272025),
(15, 3626386192, 1292108420),
(15, 3626386193, 1292108452),
(15, 3626386194, 1292108473);
user_id save_id sequence from_unixtime(sequence) session_id
21 5126897534 1291232155 2010-12-01T19:35:55Z 1
15 3626385397 1291238787 2010-12-01T21:26:27Z 2
3 839719945 1291238821 2010-12-01T21:27:01Z 3
3 839719970 1291241768 2010-12-01T22:16:08Z 4
3 839719977 1291250458 2010-12-02T00:40:58Z 5
3 839720006 1291264273 2010-12-02T04:31:13Z 6
3 839720007 1291264290 2010-12-02T04:31:30Z 6
3 839720008 1291264302 2010-12-02T04:31:42Z 6
3 839720020 1291270475 2010-12-02T06:14:35Z 7
4 1054078902 1291270475 2010-12-02T06:14:35Z 7
4 1054078903 1291271012 2010-12-02T06:23:32Z 7
4 1054078916 1291271268 2010-12-02T06:27:48Z 7
3 839720036 1291271271 2010-12-02T06:27:51Z 7
3 839720037 1291271296 2010-12-02T06:28:16Z 7
4 1054078919 1291271394 2010-12-02T06:29:54Z 7
4 1054078920 1291271595 2010-12-02T06:33:15Z 7
3 839720040 1291271629 2010-12-02T06:33:49Z 7
4 1054078922 1291271811 2010-12-02T06:36:51Z 7
4 1054078923 1291272025 2010-12-02T06:40:25Z 7
15 3626386192 1292108420 2010-12-11T23:00:20Z 8
15 3626386193 1292108452 2010-12-11T23:00:52Z 8
15 3626386194 1292108473 2010-12-11T23:01:13Z 8
select
user_id,
save_id,
from_unixtime(sequence) ts,
sum(case when sequence - lag_sequence < 30 * 60 then 0 else 1 end)
over(partition by user_id order by sequence) sid
from (
select
uhs.*,
lag(sequence) over(partition by user_id order by sequence) lag_sequence
from user_has_saves uhs
) t
user_id * 1000
+ sum(case when sequence - lag_sequence < 30 * 60 then 0 else 1 end)
over(partition by user_id order by sequence) sid
CREATE TABLE `user_has_saves` (
`user_id` int(9) unsigned NOT NULL,
`save_id` bigint(20) unsigned NOT NULL,
`sequence` int(11) unsigned NOT NULL,
PRIMARY KEY (`user_id`,`save_id`),
KEY `index_on_timestamp` (`sequence`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;
INSERT INTO `user_has_saves` (`user_id`, `save_id`, `sequence`)
VALUES
(21, 5126897534, 1291232155),
(15, 3626385397, 1291238787),
(3, 839719945, 1291238821),
(3, 839719970, 1291241768),
(3, 839719977, 1291250458),
(3, 839720006, 1291264273),
(3, 839720007, 1291264290),
(3, 839720008, 1291264302),
(3, 839720020, 1291270475),
(4, 1054078902, 1291270475),
(4, 1054078903, 1291271012),
(4, 1054078916, 1291271268),
(3, 839720036, 1291271271),
(3, 839720037, 1291271296),
(4, 1054078919, 1291271394),
(4, 1054078920, 1291271595),
(3, 839720040, 1291271629),
(4, 1054078922, 1291271811),
(4, 1054078923, 1291272025),
(15, 3626386192, 1292108420),
(15, 3626386193, 1292108452),
(15, 3626386194, 1292108473);
select
IF(@userid = user_id
,IF((sequence - @Sequence) > (30 * 60)
,@Sequenceid := @Sequenceid + 1
, @Sequenceid := @Sequenceid
)
,@Sequenceid := @Sequenceid + 1
) as sequence_id
,@userid := user_id user_id,
save_id,
@Sequence := sequence as timestamp,
from_unixtime(sequence)
from (SELECT * FROM user_has_saves
order by sequence asc) t1 , (SELECT @Sequence := 0) t2 , (SELECT @Sequenceid := 0) t3, (SELECT @userid := 0) t4
limit 1000;
select
IF(@userid = user_id
,IF((sequence - @Sequence) > (30 * 60)
,@Sequenceid := @Sequenceid + 1
, @Sequenceid := @Sequenceid
)
,@Sequenceid := 1
) as sequence_id
,IF(@userid = user_id
,IF((sequence - @Sequence) > (30 * 60)
,@Sequence := Sequence
, @Sequence := @Sequence
)
,@Sequence := sequence
) as firstinsequence
,@userid := user_id user_id,
save_id,
sequence as timestamp,
from_unixtime(sequence)
from (SELECT * FROM user_has_saves
order by user_id asc, sequence asc) t1 , (SELECT @Sequence := 0) t2 , (SELECT @Sequenceid := 0) t3, (SELECT @userid := 0) t4
limit 1000;