查询SQL不能与Controller Laravel 5一起工作 - Query SQL Cannot work with Controller Laravel 5

Query SQL Cannot work with Controller Laravel 5

下面是SQL查询

SELECT sum(statement.amount)
FROM statement, lender
WHERE statement.type = 01
AND lender.id = statement.lender_id
AND statement.stat = 888
AND lender.user_id = users.id

这是我在控制器

中的代码

$count_totaldeposit = DB::table('statement')->join('lender','lender.id', '=', 'statement.lender_id')
                                            ->where('lender.user_id',$userId)
                                            ->where('type',01)
                                            ->where('statement.stat',888)->sum('statement.amount');

我不知道问题在哪里，有人能帮我弄一下密码吗?

我只需要在01里面添加(")。

像这样:

->where('type',"01")