質問編集履歴
6
クエリーパターンを追加
test
CHANGED
File without changes
|
test
CHANGED
@@ -68,7 +68,7 @@
|
|
68
68
|
|
69
69
|
|
70
70
|
|
71
|
-
#
|
71
|
+
# クエリー1(baseball.pitchに集約)
|
72
72
|
|
73
73
|
```MySQL
|
74
74
|
|
@@ -96,7 +96,7 @@
|
|
96
96
|
|
97
97
|
|
98
98
|
|
99
|
-
### Explainで実行計画結果。
|
99
|
+
### Explainで実行計画結果(クエリー1)。
|
100
100
|
|
101
101
|
#### Indexを貼らない場合
|
102
102
|
|
@@ -165,3 +165,77 @@
|
|
165
165
|
1 row in set (0.00 sec)
|
166
166
|
|
167
167
|
```
|
168
|
+
|
169
|
+
|
170
|
+
|
171
|
+
# クエリー2(baseball.playerに集約)
|
172
|
+
|
173
|
+
```MySQL
|
174
|
+
|
175
|
+
explain select * from baseball.player as 選手
|
176
|
+
|
177
|
+
left join baseball.pitch as 投手
|
178
|
+
|
179
|
+
on 選手.年度 = 投手.年度
|
180
|
+
|
181
|
+
and 選手.選手ID = 投手.投手ID
|
182
|
+
|
183
|
+
left join baseball.pitch as 打者
|
184
|
+
|
185
|
+
on 選手.年度 = 打者.年度
|
186
|
+
|
187
|
+
and 選手.選手ID = 打者.打者ID;
|
188
|
+
|
189
|
+
```
|
190
|
+
|
191
|
+
|
192
|
+
|
193
|
+
### Explainで実行計画結果(クエリー2)。
|
194
|
+
|
195
|
+
#### Indexを貼った場合
|
196
|
+
|
197
|
+
```mySQL
|
198
|
+
|
199
|
+
+----+-------------+--------+------------+------+-----------------------------------+---------------------+---------+-------------------------------------------------+------+----------+-------+
|
200
|
+
|
201
|
+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|
202
|
+
|
203
|
+
+----+-------------+--------+------------+------+-----------------------------------+---------------------+---------+-------------------------------------------------+------+----------+-------+
|
204
|
+
|
205
|
+
| 1 | SIMPLE | 選手 | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 100.00 | NULL |
|
206
|
+
|
207
|
+
| 1 | SIMPLE | 投手 | NULL | ref | id_year_index,id_year_index_toshu | id_year_index_toshu | 10 | baseball.選手.年度,baseball.選手.選手ID | 1002 | 100.00 | NULL |
|
208
|
+
|
209
|
+
| 1 | SIMPLE | 打者 | NULL | ref | id_year_index,id_year_index_toshu | id_year_index | 10 | baseball.選手.年度,baseball.選手.選手ID | 734 | 100.00 | NULL |
|
210
|
+
|
211
|
+
+----+-------------+--------+------------+------+-----------------------------------+---------------------+---------+-------------------------------------------------+------+----------+-------+
|
212
|
+
|
213
|
+
3 rows in set, 1 warning (0.00 sec)
|
214
|
+
|
215
|
+
```
|
216
|
+
|
217
|
+
|
218
|
+
|
219
|
+
#### Indexを貼らない場合
|
220
|
+
|
221
|
+
```mySQL
|
222
|
+
|
223
|
+
+----+-------------+--------+------------+------+---------------+------+---------+------+--------+----------+----------------------------------------------------+
|
224
|
+
|
225
|
+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|
226
|
+
|
227
|
+
+----+-------------+--------+------------+------+---------------+------+---------+------+--------+----------+----------------------------------------------------+
|
228
|
+
|
229
|
+
| 1 | SIMPLE | 選手 | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 100.00 | NULL |
|
230
|
+
|
231
|
+
| 1 | SIMPLE | 投手 | NULL | ALL | NULL | NULL | NULL | NULL | 771848 | 100.00 | Using where; Using join buffer (Block Nested Loop) |
|
232
|
+
|
233
|
+
| 1 | SIMPLE | 打者 | NULL | ALL | NULL | NULL | NULL | NULL | 771848 | 100.00 | Using where; Using join buffer (Block Nested Loop) |
|
234
|
+
|
235
|
+
+----+-------------+--------+------------+------+---------------+------+---------+------+--------+----------+----------------------------------------------------+
|
236
|
+
|
237
|
+
3 rows in set, 1 warning (0.00 sec)
|
238
|
+
|
239
|
+
|
240
|
+
|
241
|
+
```
|
5
クエリの場所変更
test
CHANGED
File without changes
|
test
CHANGED
@@ -16,31 +16,7 @@
|
|
16
16
|
|
17
17
|
|
18
18
|
|
19
|
-
###
|
19
|
+
### テーブル概要
|
20
|
-
|
21
|
-
```MySQL
|
22
|
-
|
23
|
-
explain select p.年度, 投手テーブル.年俸 as 投手年俸, 身長 as 打者身長
|
24
|
-
|
25
|
-
from baseball.pitch as p
|
26
|
-
|
27
|
-
join (select 年度, 年俸, 選手ID from baseball.player) as 投手テーブル
|
28
|
-
|
29
|
-
on p.年度 = 投手テーブル.年度
|
30
|
-
|
31
|
-
and p.投手ID = 投手テーブル.選手ID
|
32
|
-
|
33
|
-
join (select 年度, 選手ID, 身長, 年俸 from baseball.player) as 打者テーブル
|
34
|
-
|
35
|
-
on p.年度 = 打者テーブル.年度
|
36
|
-
|
37
|
-
and p.打者ID = 打者テーブル.選手ID
|
38
|
-
|
39
|
-
limit 10000;
|
40
|
-
|
41
|
-
```
|
42
|
-
|
43
|
-
|
44
20
|
|
45
21
|
##### baseball.pitch (70万レコード)
|
46
22
|
|
@@ -87,6 +63,34 @@
|
|
87
63
|
|2018|100|180|15000|A|1982/1/1|
|
88
64
|
|
89
65
|
|、、、|、、、|、、、|、、、|、、、|、、、|
|
66
|
+
|
67
|
+
|
68
|
+
|
69
|
+
|
70
|
+
|
71
|
+
### クエリー
|
72
|
+
|
73
|
+
```MySQL
|
74
|
+
|
75
|
+
explain select p.年度, 投手テーブル.年俸 as 投手年俸, 身長 as 打者身長
|
76
|
+
|
77
|
+
from baseball.pitch as p
|
78
|
+
|
79
|
+
join (select 年度, 年俸, 選手ID from baseball.player) as 投手テーブル
|
80
|
+
|
81
|
+
on p.年度 = 投手テーブル.年度
|
82
|
+
|
83
|
+
and p.投手ID = 投手テーブル.選手ID
|
84
|
+
|
85
|
+
join (select 年度, 選手ID, 身長, 年俸 from baseball.player) as 打者テーブル
|
86
|
+
|
87
|
+
on p.年度 = 打者テーブル.年度
|
88
|
+
|
89
|
+
and p.打者ID = 打者テーブル.選手ID
|
90
|
+
|
91
|
+
limit 10000;
|
92
|
+
|
93
|
+
```
|
90
94
|
|
91
95
|
|
92
96
|
|
4
EXLPAINの結果追記
test
CHANGED
File without changes
|
test
CHANGED
@@ -16,11 +16,11 @@
|
|
16
16
|
|
17
17
|
|
18
18
|
|
19
|
-
###
|
19
|
+
### クエリー
|
20
20
|
|
21
21
|
```MySQL
|
22
22
|
|
23
|
-
select
|
23
|
+
explain select p.年度, 投手テーブル.年俸 as 投手年俸, 身長 as 打者身長
|
24
24
|
|
25
25
|
from baseball.pitch as p
|
26
26
|
|
@@ -96,26 +96,68 @@
|
|
96
96
|
|
97
97
|
#### Indexを貼らない場合
|
98
98
|
|
99
|
-
|
99
|
+
```mySQL
|
100
100
|
|
101
|
-
|
101
|
+
+----+-------------+--------+------------+------+---------------+------+---------+------+--------+----------+----------------------------------------------------+
|
102
102
|
|
103
|
-
|
|
103
|
+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|
104
104
|
|
105
|
-
|
105
|
+
+----+-------------+--------+------------+------+---------------+------+---------+------+--------+----------+----------------------------------------------------+
|
106
106
|
|
107
|
+
| 1 | SIMPLE | player | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 100.00 | NULL |
|
108
|
+
|
109
|
+
| 1 | SIMPLE | player | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 10.00 | Using where; Using join buffer (Block Nested Loop) |
|
110
|
+
|
107
|
-
| 1 | SIMPLE | p | NULL | ALL | NULL | NULL | NULL | NULL | 771848 | 0.1 | Using where; Using join buffer (Block Nested Loop) |
|
111
|
+
| 1 | SIMPLE | p | NULL | ALL | NULL | NULL | NULL | NULL | 771848 | 0.10 | Using where; Using join buffer (Block Nested Loop) |
|
112
|
+
|
113
|
+
+----+-------------+--------+------------+------+---------------+------+---------+------+--------+----------+----------------------------------------------------+
|
114
|
+
|
115
|
+
3 rows in set, 1 warning (0.00 sec)
|
116
|
+
|
117
|
+
```
|
118
|
+
|
119
|
+
#### Indexを貼った場合
|
108
120
|
|
109
121
|
|
110
122
|
|
111
|
-
|
123
|
+
```mySQL
|
112
124
|
|
113
|
-
|
125
|
+
+----+-------------+--------+------------+------+---------------+---------------+---------+---------------------------------------+--------+----------+-------------+
|
114
126
|
|
115
|
-
|
|
127
|
+
| id | select_type | table | partitions | type | possible_keys | key | key_len | ref | rows | filtered | Extra |
|
116
128
|
|
117
|
-
|
129
|
+
+----+-------------+--------+------------+------+---------------+---------------+---------+---------------------------------------+--------+----------+-------------+
|
118
130
|
|
119
|
-
| 1 | SIMPLE | p
|
131
|
+
| 1 | SIMPLE | p | NULL | ALL | id_year_index | NULL | NULL | NULL | 771848 | 100.00 | Using where |
|
120
132
|
|
121
|
-
| 1 | SIMPLE | player | NULL |
|
133
|
+
| 1 | SIMPLE | player | NULL | ref | id_year_index | id_year_index | 10 | baseball.p.年度,baseball.p.投手ID | 1 | 100.00 | NULL |
|
134
|
+
|
135
|
+
| 1 | SIMPLE | player | NULL | ref | id_year_index | id_year_index | 10 | baseball.p.年度,baseball.p.打者ID | 1 | 100.00 | NULL |
|
136
|
+
|
137
|
+
+----+-------------+--------+------------+------+---------------+---------------+---------+---------------------------------------+--------+----------+-------------+
|
138
|
+
|
139
|
+
3 rows in set, 1 warning (0.00 sec)
|
140
|
+
|
141
|
+
```
|
142
|
+
|
143
|
+
|
144
|
+
|
145
|
+
|
146
|
+
|
147
|
+
Warning内容
|
148
|
+
|
149
|
+
```
|
150
|
+
|
151
|
+
+-------+------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
152
|
+
|
153
|
+
| Level | Code | Message |
|
154
|
+
|
155
|
+
+-------+------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
156
|
+
|
157
|
+
| Note | 1003 | /* select#1 */ select `baseball`.`p`.`年度` AS `年度`,`baseball`.`player`.`年俸` AS `投手年俸`,`baseball`.`player`.`身長` AS `打者身長` from `baseball`.`pitch` `p` join `baseball`.aseball`.`player` where ((`baseball`.`player`.`選手ID` = `baseball`.`p`.`投手ID`) and (`baseball`.`player`.`選手ID` = `baseball`.`p`.`打者ID`) and (`baseball`.`player`.`年度` = `baseball`.`p`.`年度eball`.`player`.`年度` = `baseball`.`p`.`年度`)) limit 10000 |
|
158
|
+
|
159
|
+
+-------+------+-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------+
|
160
|
+
|
161
|
+
1 row in set (0.00 sec)
|
162
|
+
|
163
|
+
```
|
3
EXPLAINの実行結果の追記
test
CHANGED
File without changes
|
test
CHANGED
@@ -92,7 +92,9 @@
|
|
92
92
|
|
93
93
|
|
94
94
|
|
95
|
-
|
95
|
+
### Explainで実行計画結果。
|
96
|
+
|
97
|
+
#### Indexを貼らない場合
|
96
98
|
|
97
99
|
| id | select\_type | table | partitions | type | possible\_keys | key | key\_len | ref | rows | filtered | Extra |
|
98
100
|
|
@@ -100,6 +102,20 @@
|
|
100
102
|
|
101
103
|
| 1 | SIMPLE | player | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 100 | NULL |
|
102
104
|
|
103
|
-
| 1 | SIMPLE | player | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 10
|
105
|
+
| 1 | SIMPLE | player | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 10 | Using where; Using join buffer (Block Nested Loop) |
|
104
106
|
|
105
|
-
| 1 | SIMPLE | p
|
107
|
+
| 1 | SIMPLE | p | NULL | ALL | NULL | NULL | NULL | NULL | 771848 | 0.1 | Using where; Using join buffer (Block Nested Loop) |
|
108
|
+
|
109
|
+
|
110
|
+
|
111
|
+
#### Indexを貼った場合
|
112
|
+
|
113
|
+
| id | select\_type | table | partitions | type | possible\_keys | key | key\_len | ref | rows | filtered | Extra |
|
114
|
+
|
115
|
+
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
|
116
|
+
|
117
|
+
| 1 | SIMPLE | p | NULL | ALL | id\_year\_index | NULL | NULL | NULL | 771848 | 100 | Using where |
|
118
|
+
|
119
|
+
| 1 | SIMPLE | player | NULL | eq\_ref | id\_year\_index | id\_year\_index | 10 | baseball.p.年度,baseball.p.投手ID | 1 | 100 | NULL |
|
120
|
+
|
121
|
+
| 1 | SIMPLE | player | NULL | eq\_ref | id\_year\_index | id\_year\_index | 10 | baseball.p.年度,baseball.p.打者ID | 1 | 100 | NULL |
|
2
EXPLAINによる実行計画の追記
test
CHANGED
File without changes
|
test
CHANGED
@@ -87,3 +87,19 @@
|
|
87
87
|
|2018|100|180|15000|A|1982/1/1|
|
88
88
|
|
89
89
|
|、、、|、、、|、、、|、、、|、、、|、、、|
|
90
|
+
|
91
|
+
|
92
|
+
|
93
|
+
|
94
|
+
|
95
|
+
また、実行計画を作成してみました。まだ内容を把握できていないので、これから調べます。
|
96
|
+
|
97
|
+
| id | select\_type | table | partitions | type | possible\_keys | key | key\_len | ref | rows | filtered | Extra |
|
98
|
+
|
99
|
+
| :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- | :--- |
|
100
|
+
|
101
|
+
| 1 | SIMPLE | player | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 100 | NULL |
|
102
|
+
|
103
|
+
| 1 | SIMPLE | player | NULL | ALL | NULL | NULL | NULL | NULL | 2704 | 100 | Using join buffer (Block Nested Loop) |
|
104
|
+
|
105
|
+
| 1 | SIMPLE | pitch | NULL | ALL | NULL | NULL | NULL | NULL | 771848 | 100 | Using where; Using join buffer (Block Nested Loop) |
|
1
表を更新
test
CHANGED
File without changes
|
test
CHANGED
@@ -44,17 +44,27 @@
|
|
44
44
|
|
45
45
|
##### baseball.pitch (70万レコード)
|
46
46
|
|
47
|
-
|年度|投手ID|打者ID|
|
47
|
+
|年度|投手ID|打者ID|投げた球の種類|時刻|アウトカウント|
|
48
48
|
|
49
|
-
|:--:|:--:|:--:|
|
49
|
+
|:--:|:--:|:--:|:--:|:--:|:--:|
|
50
50
|
|
51
|
-
|2017|100|102|
|
51
|
+
|2017|100|102|ストレート|19:00|0|
|
52
52
|
|
53
|
-
|2017|101|100|
|
53
|
+
|2017|100|102|ストレート|19:01|0|
|
54
54
|
|
55
|
-
|201
|
55
|
+
|2017|100|102|スライダー|19:01|0|
|
56
56
|
|
57
|
+
|2017|101|100|カーブ|19:03|1|
|
58
|
+
|
57
|
-
|、、、|、、、|、、、|
|
59
|
+
|、、、|、、、|、、、|、、、|、、、|
|
60
|
+
|
61
|
+
|2018|100|102|カーブ|20:00|0|
|
62
|
+
|
63
|
+
|2018|100|102|カーブ|20:00|0|
|
64
|
+
|
65
|
+
|2018|100|102|カーブ|20:02|0|
|
66
|
+
|
67
|
+
|、、、|、、、|、、、|、、、|、、、|、、、|
|
58
68
|
|
59
69
|
|
60
70
|
|
@@ -64,16 +74,16 @@
|
|
64
74
|
|
65
75
|
#### baseball.player (3000レコード)
|
66
76
|
|
67
|
-
|年度|選手ID|身長|年俸|氏名|
|
77
|
+
|年度|選手ID|身長|年俸|氏名|生年月日|
|
68
78
|
|
69
|
-
|:--|:--:|:--:|:--:|:--:|
|
79
|
+
|:--|:--:|:--:|:--:|:--:|:--:|
|
70
80
|
|
71
|
-
|2017|100|180|20000|A|
|
81
|
+
|2017|100|180|20000|A|1990/1/1|
|
72
82
|
|
73
|
-
|2017|101|175|10000|B|
|
83
|
+
|2017|101|175|10000|B|1989/3/1|
|
74
84
|
|
75
|
-
|2017|102|170|8000|C|
|
85
|
+
|2017|102|170|8000|C|1991/5/1|
|
76
86
|
|
77
|
-
|2018|100|180|15000|A|
|
87
|
+
|2018|100|180|15000|A|1982/1/1|
|
78
88
|
|
79
|
-
|、、、|、、、|、、、|、、、|、、、|
|
89
|
+
|、、、|、、、|、、、|、、、|、、、|、、、|
|