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                ??碼云GVP開源項目 12k star Uniapp+ElementUI 功能強大 支持多語言、二開方便! 廣告
                > `groupby`用于對數據集合進行分組,例如: ```php //查詢訂單表中每個用戶的訂單總額 Db('order')->select([ 'field' => ['SUM(OrderPrice) as Price','userId'], 'groupby' => 'userId' ])->get(); //sql:SELECT SUM(OrderPrice) as Price,`userId` FROM `order` GROUP BY userId; ``` >SQL小技巧:對于查詢頻率高的多數據表,建立字段索引將大大提高查詢速度
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