Yii2连接PostgreSql的方法

1、配置连接postgresql的连接信息：

$dev = [
 'class' => 'yiidbConnection',
 'dsn' => 'pgsql:host=122.112.182.211;port=8000;dbname=sdk_info',
 'username' => 'dbadmin',
 'password' => 'Styl2018@',
 'charset' => 'utf8',
// 'emulatePrepare' => true
];
return $dev;

2、Yii2目录下，models目录下新建model：

class TestSdkVsent extends Base
{
 public static function getDb()
 {
 return Yii::$app->dbDws;
 }
 public static function tableName()
 {
 return 'sdk_info.tb_sdk_vsent'; // TODO: Change the autogenerated stub
 }
 public static function test()
 {
 $find = static::find();
 $result = $find->select('rtt')->limit(1) ->asArray()->one();
 return $result;
 }
}

3、备注：

$result = $find->select('rtt')->limit(1)->asArray()->one(); 查询到一条数据返回

解析结果：``SELECT * FROM "sdk_info"."tb_sdk_vsent" LIMIT 1

$result = $find->select('rtt')->asArray()->one(); 会查询所有的数据返回一条

解析结果：SELECT "rtt" FROM "sdk_info"."tb_sdk_vsent"

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