Indexes - MongoDB Manual v7.0

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[akatakun]

複数のIndexを使用し、その共通部分を抜き出す

[nabetama]

“Compound ”

[noradaiko]

Since indexing an array only indexes each element in the array it is not possible to do an exact array match using an index on the array field.順序がだいじなのでどっちでもいいか。