回答編集履歴
2
修正
answer
CHANGED
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@@ -2,17 +2,18 @@
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2
2
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3
3
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> A,Bに対してCの値が、複数存在すれば
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4
4
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5
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-
と仮定して
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5
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+
と仮定して、更新なのでupdateします。
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6
6
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7
7
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```SQL
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8
8
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update (
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9
9
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select T2.*
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10
10
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from Table1 T1 inner join Table2 T2 on T1.***=T2.***
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11
11
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where (A,B) in (
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12
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-
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12
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+
select A,B
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13
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-
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13
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+
from Table1 T1 inner join Table2 T2 on T1.***=T2.***
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14
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-
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14
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+
group by A,B
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15
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-
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15
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+
having count(distinct C)>1
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16
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+
)
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16
17
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)
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17
18
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set c=Null
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18
19
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```
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1
修正
answer
CHANGED
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@@ -5,11 +5,14 @@
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5
5
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と仮定して
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6
6
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7
7
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```SQL
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8
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+
update (
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9
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+
select T2.*
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8
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-
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10
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+
from Table1 T1 inner join Table2 T2 on T1.***=T2.***
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9
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-
where (A,B) in (
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11
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+
where (A,B) in (
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10
12
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select A,B
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11
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-
from
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13
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+
from Table1 T1 inner join Table2 T2 on T1.***=T2.***
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12
14
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group by A,B
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13
15
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having count(distinct C)>1
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14
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-
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16
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+
)
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17
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+
set c=Null
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15
18
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```
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