回答編集履歴
1
追記
test
CHANGED
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@@ -7,3 +7,9 @@
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7
7
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で、Rubyで処理するなら
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8
8
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9
9
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`tables = Table.pluck(:store_code, :name).group_by(&:store_code).group_by(&:first).map{|k,a| [k,a.map(&:last)]}.to_h`
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10
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+
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11
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+
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12
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+
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13
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+
追記
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14
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+
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15
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+
`original.group_by{|h| h["store_code"]}.map{|k,a| [k,a.map{|h| h["name"]}]}.to_h`
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