laravel跨库查询方法

laravel中跨库查询技巧：

1. 跨库查询

# 声明库名和表名即可
$broker = \DB::connection('database2')->table('broker')
            ->where(['state'=>1, 'id'=>15])->first();

2. 跨库连表查询

# 跨数据库连接表查询数据比较麻烦，在拼接SQL时，连接库相关必须使用\DB::raw()来声明定义，否则框架会自动在前面添加主库表前缀test_
$data = TestModel::from('test_book as logbook')
            ->select(['logbook.id', \DB::raw('o.orderNo'), 'logbook.money', 'logbook.capitalType as payTypeName', \DB::raw('o.actualPay as totalPrice'), \DB::raw('o.payTime')])
            ->leftJoin(\DB::raw('`database2`.`order` as o'), \DB::raw('o.id'), 'logbook.orderId')
            ->where(['logbook.entityType'=>'broker', 'logbook.entityId'=>15, 'logbook.io'=>1])
            ->paginate(1);