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異なる行ではなく単一のセルに複数の値を格納して検索する方法はありますか?
僕にできる:
pId | available 1 | US,UK,CA,SE 2 | US,SE
それ以外の:
pId | available 1 | US 1 | UK 1 | CA 1 | SE
次に、次のようにします。
select pId from table where available = 'US'