yii生成sql语句操作数据库实例
yii框架是一个国外非常火爆的框架了,下文我们一起来看看yii生成sql语句操作数据库的简单例子,如果各位对此例子有兴趣可以进入参考一下吧。
yii框架使用原生态的sql语句也是可以对数据库进行操作的,以下就是详细的操作代码,很详细:
<?php
class IndexController extends Controller {
public function actionIndex() {
$con = Yii::app()->db; //数据库连接
//查询
$sql = "select * from user";
$command = $con->createCommand($sql);
$res = $command->queryAll();
print_r($res);
//插入
$sql = "insert into user (integral,name) values (999,'www.phprm.com')";
$command = $con->createCommand($sql);
$res = $command->execute();
print_r($res);
//删除
$sql = "delete from user where id=1";
$command = $con->createCommand($sql);
$res = $command->execute();
print_r($res);
//查询结果
$sql = "select * from user";
$command = $con->createCommand($sql);
$res = $command->queryAll();
print_r($res);
}
}
运行后的结果为:Array(
[0] => Array(
[id] => 1[integral] => 3000[name] => aa
) [1] => Array(
[id] => 2[integral] => 2000[name] => aa
) [2] => Array(
[id] => 3[integral] => 1000[name] => bb
)
) 11Array(
[0] => Array(
[id] => 2[integral] => 2000[name] => aa
) [1] => Array(
[id] => 3[integral] => 1000[name] => bb
) [2] => Array(
[id] => 4[integral] => 999[name] => www . phprm . com
)
)这种方法,有些时候还是能够用得到的。
$connection = Yii::app()->db; $sql = "SELECT * FROM `project` ORDER BY id DESC"; $command = $connection->createCommand($sql); $result = $command->queryAll(); print_r($result);
例2
$db = Yii::app()->db; //you have to define db connection in config/main.php
$sql = "select sum(if(starttime>'09:00:00',1,0)) as late,
sum(if(endtime<'18:00:00',1,0)) as early
from present where userid=:userid and date between :date_start and :date_end"$results = $db->createCommand($sql)->query(array(
':userid' => 115,
':date_start' => '2009-12-1',
':date_end' => '2009-12-31',
));
foreach ($results as $result) {
echo $result['late'], " and ", $result['early'], " \n";
}例3
$sql = "select sum(if(starttime>'09:00:00',1,0)) as late,
sum(if(endtime<'18:00:00',1,0)) as early
from present where userid=115 and date between '2009-12-1' and '2009-12-31'"$results = $db->createCommand($sql)->query();
foreach ($results as $result) {
echo $result['late'], " and ", $result['early'], " \n";
}说明:把查询条件作为参数(如例2),比较安全,可直接避免注入。要是直接用在SQL语句中,最好要经过防注入处理
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