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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                * [ ] 功能 * 通常用于結合合計函數,根據一個或多個列對結果集進行分組 * group 方法只有一個參數,并且只能使用字符串 * 場景:user 數據庫的 user_account 表只有 3 條數據,數據為: user_account 表 | uid | username | | :---: | :---: | | 1 | 張三 | | 2 | 李四 | | 3 | 隔壁老王 | * 用法:按照某個或多個字段進行分組統計 ~~~ // 過濾字段,同時統計相同 username 的個數, as 是設置字段別名 $field = 'uid, username, count(username) as username_num'; // 按照用戶 ID 進行分組 $group = 'uid'; $data = mysql\User::table('account')->field( $field )->group( $group )->select(); ~~~ 查詢結果: ~~~ array( array( 'uid' => 1, 'username' => '張三', 'username_num' => 1, ), array( 'uid' => 2, 'username' => '李四', 'username_num' => 1, ), array( 'uid' => 3, 'username' => '隔壁老王', 'username_num' => 1, ), ); ~~~
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