1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
| --------------
START TRANSACTION
--------------
--------------
set session collation_connection = "latin1_general_ci"
--------------
--------------
DROP DATABASE IF EXISTS `base`
--------------
--------------
CREATE DATABASE IF NOT EXISTS `base`
DEFAULT CHARACTER SET `latin1`
DEFAULT COLLATE `latin1_general_ci`
--------------
--------------
DROP TABLE IF EXISTS `test`
--------------
--------------
CREATE TABLE `test`
( `id` integer unsigned NOT NULL,
`date` date NOT NULL,
`incr` integer unsigned NULL default NULL,
primary key (`id`,`date`)
) ENGINE=InnoDB
DEFAULT CHARSET=`latin1` COLLATE=`latin1_general_ci`
ROW_FORMAT=COMPRESSED
--------------
--------------
INSERT INTO `test` (`id`,`date`) VALUES
(127, '2014-05-01'),
(321, '2019-02-24'),
(114, '2021-04-01'),
(127, '2012-02-01'),
(127, '2013-04-02'),
(144, '2022-04-01'),
(321, '2020-02-01'),
(444, '2020-04-01'),
(127, '2022-07-01')
--------------
--------------
select * from `test` order by id, date
--------------
+-----+------------+------+
| id | date | incr |
+-----+------------+------+
| 114 | 2021-04-01 | NULL |
| 127 | 2012-02-01 | NULL |
| 127 | 2013-04-02 | NULL |
| 127 | 2014-05-01 | NULL |
| 127 | 2022-07-01 | NULL |
| 144 | 2022-04-01 | NULL |
| 321 | 2019-02-24 | NULL |
| 321 | 2020-02-01 | NULL |
| 444 | 2020-04-01 | NULL |
+-----+------------+------+
--------------
update `test` as t1
inner join ( select @i:=if (id=@p,@i+1,1) as incr,
@p:=id as id,
date as date
from `test`
cross join ( SELECT @i:=0,@p:='' ) as y
order by id, date asc
) as t2
on t2.id = t1.id
and t2.date = t1.date
set t1.incr = t2.incr
--------------
--------------
select * from `test` order by id, date
--------------
+-----+------------+------+
| id | date | incr |
+-----+------------+------+
| 114 | 2021-04-01 | 1 |
| 127 | 2012-02-01 | 1 |
| 127 | 2013-04-02 | 2 |
| 127 | 2014-05-01 | 3 |
| 127 | 2022-07-01 | 4 |
| 144 | 2022-04-01 | 1 |
| 321 | 2019-02-24 | 1 |
| 321 | 2020-02-01 | 2 |
| 444 | 2020-04-01 | 1 |
+-----+------------+------+
--------------
update `test` set incr=NULL
--------------
--------------
update `test` as t1
left outer join ( select t3.id,
t3.date,
count(*) as incr
from `test` as t3
left outer join `test` as t4
on t4.id = t3.id
and t4.date <= t3.date
group by t3.id, t3.date
) as t2
on t2.id = t1.id
and t2.date = t1.date
set t1.incr = t2.incr
--------------
--------------
select * from `test` order by id, date
--------------
+-----+------------+------+
| id | date | incr |
+-----+------------+------+
| 114 | 2021-04-01 | 1 |
| 127 | 2012-02-01 | 1 |
| 127 | 2013-04-02 | 2 |
| 127 | 2014-05-01 | 3 |
| 127 | 2022-07-01 | 4 |
| 144 | 2022-04-01 | 1 |
| 321 | 2019-02-24 | 1 |
| 321 | 2020-02-01 | 2 |
| 444 | 2020-04-01 | 1 |
+-----+------------+------+
--------------
COMMIT
--------------
Appuyez sur une touche pour continuer... |
