回答編集履歴
2
調整
test
CHANGED
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@@ -23,3 +23,11 @@
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23
23
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delete from user where SCORE<=50;
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24
24
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commit;
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25
25
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```
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26
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+
# 調整
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27
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+
deleteで「SCORE<=50」を条件に使いたくない場合
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28
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+
```SQL
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29
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+
start transaction;
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30
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+
update hoge,user set hoge.status='update',USER.SCORE=null where user.SCORE<=50 and user.ID=hoge.user_id;
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31
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+
delete from user where SCORE is null;
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32
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+
commit;
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33
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+
```
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1
調整
test
CHANGED
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@@ -1,2 +1,25 @@
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1
1
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hogeテーブルのuser_idに該当するレコードをuserテーブルから削除してしまうのは
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2
2
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リレーションDBとして合理的ではありません
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3
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+
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4
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+
```SQL
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5
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+
create table user(ID int primary key,USER varchar(20),SCORE int);
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6
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+
insert into user values
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7
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+
(1,'TARO',90),
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8
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+
(2,'JIRO',40),
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9
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+
(3,'SABU',80),
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10
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+
(4,'SIRO',30),
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11
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+
(5,'GORO',10);
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12
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+
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13
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+
create table hoge(USER_ID int primary key, status varchar(10));
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14
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+
insert into hoge values
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15
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+
(1,'通過'),
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|
16
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+
(2,'通過'),
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17
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+
(3,'通過'),
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18
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+
(4,'通過'),
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19
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+
(5,'通過');
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20
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+
|
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21
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+
start transaction;
|
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22
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+
update hoge,user set hoge.status='update' where user.SCORE<=50 and user.ID=hoge.user_id;
|
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23
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+
delete from user where SCORE<=50;
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24
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+
commit;
|
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25
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+
```
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