[英]Laravel/Eloquent: How do I refer to a column of the outer select in a Larvael `->whereNotExists` sub-query?
[英]How to select sub-query with left join inside using eloquent?
我对 Laravel 很陌生,如何使用 Eloquent Z20F35E630DAF494DBFA4C3F688 在 Laravel 中进行此查询
SELECT
(
SELECT departments.deptname FROM school.counts
LEFT JOIN reference.departments
ON counts.departmentcode = department.departmentcode
WHERE counts.countid = a.countsid
) AS departmentDesc
FROM school.subjecthdr a
LEFT JOIN school.subjectdtls b
ON a.subjectid = b.subjectid;
我不想使用原始查询,有什么办法吗? 如果有任何原始查询建议,我仍然很感激。
我认为您仍然需要一些原始查询。
$dept_desc = \DB::table('school.counts')
->leftjoin('reference.departments', 'counts.departmentcode', '=', 'departments.departmentcode')
->whereRaw('counts.countid = a.countsid')
->selectRaw('departments.deptname');
\DB::table('school.subjecthdr AS a')
->leftjoin('subjectdtls AS b', 'a.subjectid', '=', 'b.subjectid')
->selectRaw('(' . $dept_desc->toSql() . ') AS departmentDesc')
->get();
PS:我想你leftjoin subjectdtls b
但似乎你不需要它。
而且你使用的不仅仅是一个数据库,如果你想使用Eloquent\Builder
,你需要做这样的事情: How to use multiple databases in Laravel
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