回答編集履歴
5
タイポ修正
test
CHANGED
|
@@ -4,7 +4,7 @@
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|
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4
4
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|
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5
5
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SELECT DISTINCT name FROM table t1
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6
6
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7
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-
WHERE not exists(select 1 from table where name=t1.na
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7
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+
WHERE not exists(select 1 from table where name=t1.name and tag ='あああ')
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8
8
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|
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9
9
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```
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10
10
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@@ -18,6 +18,6 @@
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18
18
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|
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19
19
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) t1
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20
20
|
|
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21
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-
WHERE not exists(select 1 from table where name=t1.na
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21
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+
WHERE not exists(select 1 from table where name=t1.name and tag ='あああ')
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22
22
|
|
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23
23
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```
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4
訂正
test
CHANGED
|
@@ -1,4 +1,4 @@
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1
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-
not existでも取得できます。
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1
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+
not existsでも取得できます。
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2
2
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3
3
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```SQL
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4
4
|
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3
訂正
test
CHANGED
|
@@ -4,7 +4,7 @@
|
|
|
4
4
|
|
|
5
5
|
SELECT DISTINCT name FROM table t1
|
|
6
6
|
|
|
7
|
-
WHERE not exists(select 1 from table where name=t1.nane and tag =
|
|
7
|
+
WHERE not exists(select 1 from table where name=t1.nane and tag ='あああ')
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8
8
|
|
|
9
9
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```
|
|
10
10
|
|
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@@ -18,6 +18,6 @@
|
|
|
18
18
|
|
|
19
19
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) t1
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|
20
20
|
|
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21
|
-
WHERE not exists(select 1 from table where name=t1.nane and tag =
|
|
21
|
+
WHERE not exists(select 1 from table where name=t1.nane and tag ='あああ')
|
|
22
22
|
|
|
23
23
|
```
|
2
訂正
test
CHANGED
|
@@ -4,7 +4,7 @@
|
|
|
4
4
|
|
|
5
5
|
SELECT DISTINCT name FROM table t1
|
|
6
6
|
|
|
7
|
-
WHERE not exists(select 1 from table where name=t1.nane and tag
|
|
7
|
+
WHERE not exists(select 1 from table where name=t1.nane and tag =`あああ`)
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|
8
8
|
|
|
9
9
|
```
|
|
10
10
|
|
|
@@ -18,6 +18,6 @@
|
|
|
18
18
|
|
|
19
19
|
) t1
|
|
20
20
|
|
|
21
|
-
WHERE not exists(select 1 from table where name=t1.nane and tag
|
|
21
|
+
WHERE not exists(select 1 from table where name=t1.nane and tag =`あああ`)
|
|
22
22
|
|
|
23
23
|
```
|
1
追記
test
CHANGED
|
@@ -7,3 +7,17 @@
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|
|
7
7
|
WHERE not exists(select 1 from table where name=t1.nane and tag !="あああ")
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|
8
8
|
|
|
9
9
|
```
|
|
10
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+
|
|
11
|
+
以下の様にすると若干高速かもしれません。
|
|
12
|
+
|
|
13
|
+
```SQL
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|
14
|
+
|
|
15
|
+
select * from (
|
|
16
|
+
|
|
17
|
+
SELECT DISTINCT name FROM table
|
|
18
|
+
|
|
19
|
+
) t1
|
|
20
|
+
|
|
21
|
+
WHERE not exists(select 1 from table where name=t1.nane and tag !="あああ")
|
|
22
|
+
|
|
23
|
+
```
|