回答編集履歴
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追記
test
CHANGED
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@@ -29,3 +29,99 @@
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```
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> しかし
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> error: syntax error at or near "null"
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> と言われてしまいました
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とのコメントを受けての追記。
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```sql
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create table xx (id text, name text, column_A text);
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create table yy (id text, name text, column_B text);
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insert into xx VALUES
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('0501', 'aaa', '0'),
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('0502', 'bbb', '1'),
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('0503', 'ccc', '0')
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;
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insert into yy VALUES
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('0661', 'ooo', '0'),
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('0662', 'ppp', '1'),
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('0663', 'qqq', '1')
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;
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```
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```sql
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with
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may as (
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select id, name, column_A, null as column_B from xx
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),
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june as (
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select id, name, null as column_A, column_B from yy
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),
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hoge as (
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select * from may union select * from june
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)
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select * from hoge where column_A = '1' or column_B = '1'
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;
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```
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```
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id | name | column_a | column_b
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------+------+----------+----------
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0502 | bbb | 1 |
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0662 | ppp | | 1
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0663 | qqq | | 1
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(3 行)
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```
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