回答編集履歴
1
訂正
answer
CHANGED
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@@ -2,7 +2,7 @@
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```SQL
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with test as (
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select name, count(*) cnt
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-
, array_to_string(array_agg(tag),',') tag_list
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5
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+
, array_to_string(array_agg(distinct tag order by tag),',') tag_list
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from TABLE_X
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group by name
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)
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@@ -13,4 +13,5 @@
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,(select tag_list from test where name='B') B_tag_list
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,(select cnt from test where name='C') C_COUNT
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,(select tag_list from test where name='C') C_tag_list
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-
```
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+
```
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+
※パターンを集約せず列挙する場合は、distinctを外して下さい
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