Laravel-使用查询生成器命名的子查询 [英] Laravel - named subquery using Query Builder

问题描述

在 MySQL子查询文档中，有一个子查询示例:

In MySQL subqueries documentation there's an exmaple of subquery:

SELECT ... FROM (subquery) [AS] name ...

这是我要转换的原始查询:

Here's the raw query which I want to transform:

select SUBQUERY_NAME.* from (select id, name from items) AS SUBQUERY_NAME

在Laravel查询生成器中有没有不用DB::raw()的方法吗?

Is there any way to do this in Laravel Query Builder without using DB::raw()?

推荐答案

不幸的是，没有.查询生成器有其局限性，更复杂的查询不在其范围内，这就是为什么DB::raw()存在的原因.但是，如果您想使其更加优雅并使用查询生成器生成子查询，则可以执行以下操作:

Unfortunatelly no. The Query Builder has its limitations and more complex queries are outside its scope, that's why DB::raw() is there. But, if you want to make it a little more elegant and generate the subquery using the Query Builder, you could do something like this this:

$subquery = DB::table('items')->select('id', 'name')->toSql();
DB::table(DB::raw($subquery . ' as subquery_name'))->select('subquery_name.*');

这篇关于Laravel-使用查询生成器命名的子查询的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！