SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 1 AND "productlocalized"."language_code" = 'en-us'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 1 AND "productlocalized"."language_code" = 'en-us'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 1 AND "productlocalized"."language_code" = 'ja'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 2 AND "productlocalized"."language_code" = 'en-us'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 2 AND "productlocalized"."language_code" = 'en-us'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 2 AND "productlocalized"."language_code" = 'ja'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 3 AND "productlocalized"."language_code" = 'en-us'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 3 AND "productlocalized"."language_code" = 'en-us'); SELECT "productlocalized"."id", "productlocalized"."product_id", "productlocalized"."language_code", "productlocalized"."name", "productlocalized"."description" FROM "productlocalized" WHERE ("productlocalized"."product_id" = 3 AND "productlocalized"."language_code" = 'ja'); クエリ発⾏におけるN+1問題 クエリ発⾏数が商品件数に⽐例する ( o(n) )