回答編集履歴
3
更新
test
CHANGED
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@@ -128,7 +128,7 @@
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-
|id|name|x|y|create_time|cnt_0_0|cnt_0_1|cnt_1_0|cnt_1_1|
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|id|name|x|y|create_time|cnt_0_0|cnt_0_1|cnt_1_0|cnt_1_1|
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|--:|--:|--:|--:|--:|--:|--:|--:|--:|
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2
しゅうせい
test
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@@ -75,3 +75,77 @@
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|0|1|2019-11-20 03:50:00|1|
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|0|1|2019-11-20 05:50:00|1|
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# 修正版
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82
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```SQL
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create table tbl(id int primary key auto_increment,name varchar(10),x int,y int,create_time datetime,
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86
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87
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index(name,x,y,create_time));
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insert into tbl(name,x,y,create_time) values
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('A',0,0,'2019-11-20 01:00'),
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('A',0,1,'2019-11-20 01:10'),
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('B',0,1,'2019-11-20 01:20'),
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96
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('A',0,1,'2019-11-20 01:30'),
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('A',1,1,'2019-11-20 01:40'),
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('B',1,1,'2019-11-20 01:50'),
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('A',0,1,'2019-11-20 02:00'),
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('A',0,1,'2019-11-20 03:50'),
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('B',0,1,'2019-11-20 05:50');
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select a.*,
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coalesce((select sum(x=0 and y=0) from tbl where a.create_time>create_time and a.name=name),0) as cnt_0_0,
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coalesce((select sum(x=0 and y=1) from tbl where a.create_time>create_time and a.name=name),0) as cnt_0_1,
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coalesce((select sum(x=1 and y=0) from tbl where a.create_time>create_time and a.name=name),0) as cnt_1_0,
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coalesce((select sum(x=1 and y=1) from tbl where a.create_time>create_time and a.name=name),0) as cnt_1_1
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from tbl as a
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order by id;
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```
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- 結果
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|id|name|x|y|create_time|cnt_0_0|cnt_0_1|cnt_1_0|cnt_1_1||
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|--:|--:|--:|--:|--:|--:|--:|--:|--:|
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|1|A|0|0|2019-11-20 01:00:00|0|0|0|0|
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|2|A|0|1|2019-11-20 01:10:00|1|0|0|0|
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|3|B|0|1|2019-11-20 01:20:00|0|0|0|0|
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|4|A|0|1|2019-11-20 01:30:00|1|1|0|0|
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|5|A|1|1|2019-11-20 01:40:00|1|2|0|0|
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|6|B|1|1|2019-11-20 01:50:00|0|1|0|0|
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|7|A|0|1|2019-11-20 02:00:00|1|2|0|1|
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|8|A|0|1|2019-11-20 03:50:00|1|3|0|1|
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|9|B|0|1|2019-11-20 05:50:00|0|1|0|1|
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1
かくにｎ
test
CHANGED
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@@ -43,3 +43,35 @@
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43
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from tbl as a;
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```
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# 確認
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50
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51
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「●期待する結果」がなぜそういう結果になるかわかりません
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55
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自分のcreate_timeより前のx=1かつy=2の件数だったらこうなりませんか？
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|x|y|create_time|count|
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|--:|--:|--:|--:|
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|0|0|2019-11-20 01:00:00|NULL|
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|0|1|2019-11-20 01:10:00|0|
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|0|2|2019-11-20 01:20:00|0|
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|0|1|2019-11-20 01:30:00|0|
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|1|2|2019-11-20 01:40:00|0|
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|1|1|2019-11-20 01:50:00|1|
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|2|0|2019-11-20 02:00:00|1|
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75
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|0|1|2019-11-20 03:50:00|1|
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|0|1|2019-11-20 05:50:00|1|
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