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                [TOC] # Command對象 與[Query查詢](http://www.kkh86.com/it/yii2/guide-db-query.html)不同,要增刪改的話不能只靠Query對象,Query對象始終都只是一個**查詢器**的角色 進行增刪改都需要一個[yii\\db\\Command](http://www.yiichina.com/doc/api/2.0/yii-db-command)對象 獲得Command對象的方式主要有2個: 1. `Yii::$app->db->createCommand()`,不用傳參數就可以了 2. `new (\yii\db\Query())->createCommand()` 然后再調用Command的insert、update、delete方法 # INSERT(插入) ~~~php $data = [ 'name' => '小明', 'age' => 9, 'email' => 'qqq@xx.com', ]; $rows = Yii::$app->db->createCommand()->insert($tableName, $data)->execute(); echo $command->rawSql; print_r([ $rows, $command->rawSql, $command->pdoStatement->fetch(PDO::FETCH_ASSOC) ]); (new \yii\db\Query())->createCommand()->insert($tableName, $data)->execute(); //一樣的效果 ~~~ 還可以批量插入: ~~~php $fields = ['name', 'age', 'email']; //定義要插入的字段 $userList = [ ['小明', 11, '123@xx.com'], //第一條記錄的數據 ['小紅', 12, '223@xx.com'], //第二條,你懂的 ['小東', 13, '323@xx.com'], ['小龍', 14, '423@xx.com'], ]; Yii::$app->db->createCommand()->batchInsert($tableName, $fields, $userList)->execute(); //返回插入的行數 ~~~ # UPDATE(更新) ~~~php $data = [ 'name' => '小明2', 'status' => 1 ]; $condition = ['>', 'age', 30]; Yii::$app->db->createCommand()->update('user', $data, $condition)->execute(); ~~~ `$condition`部分和Query的where參數寫法一樣 # DELETE(刪除) ~~~php $condition = ['>', 'age', 30]; Yii::$app->db->createCommand()->delete('user', $condition)->execute(); ~~~ `$condition`部分和Query的where參數寫法一樣too
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