回答編集履歴
1
訂正
test
CHANGED
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@@ -4,12 +4,34 @@
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4
4
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5
5
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SELECT kickoff AS キックオフ日時,
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6
6
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7
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-
(select
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7
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+
IsNull((select name from countries where p.my_country_id = id), '') AS 国名1,
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8
8
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9
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-
(select
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9
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+
IsNull((select name from countries where p.enemy_country_id = id), '') AS 国名2
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10
10
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11
11
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FROM pairings p
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12
12
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13
13
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ORDER BY kickoff
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14
14
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15
15
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```
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16
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+
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17
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+
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18
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19
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LEFT JOIN の置き換えだったらNULLはNULLのままでいいのか。
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20
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+
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21
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だとするとIsNullはいらないか。
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22
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+
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23
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24
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25
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```SQL
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26
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+
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27
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SELECT kickoff AS キックオフ日時,
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28
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+
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29
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(select name from countries where p.my_country_id = id) AS 国名1,
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30
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+
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31
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(select name from countries where p.enemy_country_id = id) AS 国名2
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32
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+
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33
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FROM pairings p
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34
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+
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35
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ORDER BY kickoff
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36
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37
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```
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