PHP SQLSTATE [42000] Syntaxfehler oder Zugriffsverletzung: 1064 in Abfrage

Question

ich eine Abfrage ausgeführt wird, aber wenn ich es ausführen, gibt es ein

SQLSTATE[42000]: Syntax error or access violation: 1064 You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near ' count(distinct exams.user_id) as count_user_mhs from `users` where `users.type`' at line 1 (SQL: select `universities`.`name`, count(distinct exams.user_id) as count_user_dsn from `users` where `users.type` = 0, count(distinct exams.user_id) as count_user_mhs from `users` where `users.type` = 1, count(exams.subject_id) as count_subject, sum(exams.score) as count_score, TIME_FORMAT(SUM(TIMEDIFF(exams.exam_end_date, exams.exam_start_date)), "%H:%i:%s") as count_time from `exams` inner join `universities` on `universities`.`id` = `exams`.`university_id` inner join `users` on `users`.`id` = `exams`.`user_id` where exists (select * from `universities` where `exams`.`university_id` = `universities`.`id`) group by `user_id` order by `count_score` desc, `count_time` asc)

$exams = Exam::join('universities', 'universities.id', '=', 'exams.university_id') 
       ->join('users', 'users.id', '=', 'exams.user_id') 
       ->select('universities.name',DB::raw('count(distinct exams.user_id) as count_user_dsn from `users` where `users.type` = 0'),DB::raw('count(distinct exams.user_id) as count_user_mhs from `users` where `users.type` = 1'),DB::raw('count(exams.subject_id) as count_subject'),DB::raw('sum(exams.score) as count_score'),DB::raw('TIME_FORMAT(SUM(TIMEDIFF(exams.exam_end_date, exams.exam_start_date)), "%H:%i:%s") as count_time')); 

Kann jemand helfen? Ich vermute, es hat etwas mit dem Ausdruck DB::raw zu tun. Aber ich weiß nicht genau, was falsch ist.

Answer 1

Ihre generierte Abfrage sieht wie folgt aus:

select 
    `universities`.`name`, 
    count(distinct exams.user_id) as count_user_dsn from `users` where `users.type` = 0, 
    count(distinct exams.user_id) as count_user_mhs from `users` where `users.type` = 1, 
    count(exams.subject_id) as count_subject, 
    sum(exams.score) as count_score, 
    TIME_FORMAT(SUM(TIMEDIFF(exams.exam_end_date, exams.exam_start_date)), "%H:%i:%s") as count_time 
from 
    `exams` 
     inner join 
    `universities` on `universities`.`id` = `exams`.`university_id` 
     inner join 
    `users` on `users`.`id` = `exams`.`user_id` 
where 
    exists (select * from `universities` where `exams`.`university_id` = `universities`.`id`) 
group by 
    `user_id` 
order by 
    `count_score` desc, 
    `count_time` asc 

Das Problem ist auf den Linien 3 und 4, die durch den DB::raw Code erzeugt werden.

Um dies zu beheben Sie benötigen, um Ihre Eloquent Abfrage wie folgt zu aktualisieren:

<?php 
$exams = Exam::join('universities', 'universities.id', '=', 'exams.university_id') 
    ->join('users', 'users.id', '=', 'exams.user_id') 
    ->select(
     'universities.name', 
     DB::raw('(select count(distinct exams.user_id) as count_user_dsn from `users` where `users.type` = 0)'), 
     DB::raw('(select count(distinct exams.user_id) as count_user_mhs from `users` where `users.type` = 1)'), 
     DB::raw('count(exams.subject_id) as count_subject'),DB::raw('sum(exams.score) as count_score'), 
     DB::raw('TIME_FORMAT(SUM(TIMEDIFF(exams.exam_end_date, exams.exam_start_date)), "%H:%i:%s") as count_time') 
    ); 

Das heißt ... Ausführen der SELECT COUNT Unterabfragen in der Haupt SELECT Aussage ist keine gute Idee, da sie für jeden ausgeführt wird Zeile, die von der Hauptabfrage ausgewählt wurde.