回答編集履歴
1
訂正
answer
CHANGED
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@@ -4,5 +4,5 @@
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4
4
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SELECT I.items_name, SUM(C.count)
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5
5
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FROM my_items AS I, carts AS C
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6
6
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WHERE I.id=C.item_id
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7
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-
GROUP BY C.item_id
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7
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+
GROUP BY C.item_id, I.items_name
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8
8
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```
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