[英]How to join other table and count the row in laravel?
我試圖計算每個求職者有多少個要求職位。 我有兩個表:求職者和職位。
求職者:
+----+---------+-----------+----------------+
| id | fb_name | fullname | desireposition |
+----+---------+-----------+----------------+
| 1 | John | John Cena | 3 |
| 2 | Christ | Christ | 4 |
| 3 | Thomas | Cfitcher | 2 |
+----+---------+-----------+----------------+
和職位:
+----+--------+------------------+
| id | job_id | require_position |
+----+--------+------------------+
| 1 | 12 | 3 |
| 2 | 13 | 3 |
| 3 | 14 | 4 |
| 4 | 15 | 5 |
| 5 | 16 | 4 |
| 6 | 17 | 3 |
+----+--------+------------------+
我的預期結果是:
+----+---------+-----------+----------------+-----------------------+
| id | fb_name | fullname | desireposition | total_requireposition |
+----+---------+-----------+----------------+-----------------------+
| 1 | John | John Cena | 3 | 3 |
| 2 | Christ | Christ | 4 | 2 |
| 3 | Thomas | Cfitcher | 2 | 0 |
+----+---------+-----------+----------------+-----------------------+
我想計算每個求職者在那兒需要多少職位。
這是我使用crossJoin
嘗試過的方法,但是不確定我實際需要使用crossJoin
。
$jobseekers = Jobseeker::crossJoin('jobpositions')
>select('fullname','fb_name','desire_position', DB::raw('count(require_position) as total_requireposition'))
->groupBy('fullname')->paginate(10);
誰能幫助我? 任何幫助將不勝感激。
您想要的常規MySQL查詢是:
SELECT s.id, fullname, fb_name, desireposition, IFNULL(COUNT(require_position), 0) AS require_position
FROM jobseeker AS s
LEFT JOIN jobposition AS p ON s.desireposition = p.require_position
GROUP BY s.id
我不使用Laravel,但我認為翻譯是:
$Jobseeker->select('fullname','fb_name','desire_position', DB::raw('IFNULL(COUNT(require_position), 0) as total_requireposition'))
->leftjoin('jobposition', 'desireposition', '=', 'require_position')
->groupBy('jobseeker.id')
->paginate(10)
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