yii2.0框架数据库操作简单示例【添加，修改，删除，查询，打印等】

本文实例讲述了yii2.0框架数据库操作。分享给大家供大家参考，具体如下：

添加

$id = \Yii::$app->db
->createCommand()
->insert('表名',['car_num' => $car_num, 'lg_shop_id' => $shop_id])
->execute();
batchInsert()：一次添加多行
// table name, column names, column values
Yii::$app->db->createCommand()->batchInsert('user', ['name', 'age'], [
  ['Tom', 30],
  ['Jane', 20],
  ['Linda', 25],
])->execute();

修改

// UPDATE (table name, column values, condition)
Yii::$app->db->createCommand()->update('user', ['status' => 1], 'age > 30')->execute();

删除

// DELETE (table name, condition)
Yii::$app->db->createCommand()->delete('user', 'status = 0')->execute();

查询条件

$status = 10;
$search = 'yii';
$query->where(['status' => $status]);
if (!empty($search)) {
  $query->andWhere(['like', 'title', $search]);
}

如果 $search 不为空，那么将会生成如下 SQL 语句：

... WHERE (`status` = 10) AND (`title` LIKE '%yii%')

查询以及打印查询sql

$query = new Query();
    $query->from('{{%shop_info}}');
    $query->where('shop_type=1');
    $query->select('shop_name');
    $rea = $query->all();//查询
    $res = $query->createCommand();//打印sql
    echo $res->sql;die;
    var_dump($rea);die;

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