I have the following relationship:
Company
Reviews
These are linked through a link table company_reviews
What I want to do is select the most recent reviews but group it by the company_id. Is this possible using Eloquent or will I need to do this using raw SQL?
Please read the documentation.
Something like this:
Reviews::select(review.*)
->join('company_reviews', 'company_reviews.review_id', '=', 'review.id')
->join('company', 'company.id', '=', 'company_reviews.company_id')
->groupBy('company.id')
->get();
Related
i want to orderby products with max price from details table.
products one to many relation with details table.
in laravel documentation we have aggregate methods like withMax ,withMin and withCount
. These methods will place a {relation}_{function}_{column} attribute on your resulting models.
now we only need to orderBy with this results.
$products = Product::withMax('details', 'price')
->orderBy('details_max_price' , 'desc')
->paginate(15);
I want to fetch data from three tables. the table is named as Student admission and course. In my query, I fetch student data and admission data using the below query
$student = Student::with('student_fees')->with('admissions')->get();
and I also want course table data, but the course table data are related to admission table. how can I fetch course table data using this query?
$users = DB::table('Student')->join('admissions', 'student.id', '=', 'admissions.student_id')->join('course', 'course.id', '=', 'admissions.course_id')->select('Student.*', 'Student.name', 'course.name')->get();
https://laravel.com/docs/5.7/queries#joins - this could help you
You can use nested eager loading
https://laravel.com/docs/8.x/eloquent-relationships#nested-eager-loading
Assume that you defined the relation with the Laravel convention in each Model Class. You can call the nested eager loading like following:
$student = Student::with(['student_fees', 'admissions', 'admissions.course'])->get();
I want to retrieve data from 4 different table using laravel eloquent with multiple criteria.
an Overview of my table;
table 1
id
name
table 2
id
name
year
table1_id
table 3
id
name
description
table2_id
table 4
id
name
quarter
table3_id
below are their relations
table 1
hasMany -> table 2
table 2
belongsTo ->table1
HasMany->table2
table 3
belongsTo ->table2
HasMany->table3
table 4
belongsTo ->table3
I'd like to fetch the data by resource show with two parameters
and i tried this
$Report = Table1::whereHas('tabke1', function($query){
$query->where('year', 'like','%'.$year.'%');
})
->with('table2')->whereHas('table3', function($query){
$query->where('quarter', 'like', '%'.$quarters.'%');
})
->get();
but im receiving syntax error.
How can I retrieve the data from multiple table with multiple filter?
i tried this table query to understand more what i expect
SELECT `table1`.*, `table2`.*, `table3`.*, `table4`.*
FROM `table1`, `table2`, `table3`, `table4`
WHERE ((`table2`.* year = 2019) AND (`table4`.* quarter = 1))
I reckon there are two queries to achieve the results.
The first query is something like:
Table1::whereHas('table2', function ($query) {
$query->where('year', 2019);
})
->whereHas('table2.table3.table4', function ($query) {
$query->where('quarter', 1);
})
->get();
The second query is something like:
Table1::select('table1.*')
->join('table2', 'table1.id', '=', 'table2.table1_id')
->join('table3', 'table2.id', '=', 'table3.table2_id')
->join('table4', 'table3.id', '=', 'table4.table3_id')
->where('table2.year', 2019)
->where('table4.quarter', 1)
->distinct()
->get();
Regarding performance, I prefer the second query.
I have two tables :
users table
{id, name}
payments table
{id, user_id, payment}
Here I want to join two tables and want to use SUM(payment) function group by id.
please give me a solution.
You can do join like this way:
$payments = DB::table('users')->join('payments','users.id','=','payments.user_id')->groupBy('users.id')->sum('payment');
//use DB to in you controller
You can use a queryBuilder for make de custom query.
I am using laravel 5.3 and I have some left join query with error in laravel query method.
This is my normal query
SELECT bran.branchName,sch.schoolName From m_schoolbranch bran
LEFT JOIN m_students stu ON stu.schoolNo=bran.schoolNo AND stu.branchNo=bran.branchNo
LEFT JOIN m_school sch ON sch.schoolNo=stu.schoolNo where stu.userNo='0000000001';
And this is my new laravel Query
DB::table('m_schoolbranch')
->join('m_students', 'm_schoolbranch.schoolNo', '=', 'm_students.schoolNo')
->join('m_students', 'm_schoolbranch.branchNo', '=', 'm_students.branchNo')
->join('m_school', 'm_schoolbranch.schoolNo', '=', 'm_school.schoolNo')
->select('m_school.schoolName', 'm_schoolbranch.branchName')
->where('m_students.userNo',$userNo)
->get();
In these query I need to match two column in table m_students so I put like this
->join('m_students', 'm_schoolbranch.branchNo', '=', 'm_students.branchNo')
But i show error...
Tables in the query need to have unique names, otherwise the DB has no way of knowing which m_schoolbranch should be used when evaluating m_schoolbranch.schoolNo.
You could use unique table aliases in your join statements but I recommend using multiple conditions on the join. Just like you use in your original SQL query. See here: https://stackoverflow.com/a/20732468/4437888
DB::table('m_schoolbranch')
->join('m_students', function($join)
{
$join->on('m_schoolbranch.schoolNo', '=', 'm_students.schoolNo');
$join->on('m_schoolbranch.branchNo', '=', 'm_students.branchNo');
})
->join('m_school', 'm_schoolbranch.schoolNo', '=', 'm_school.schoolNo')
->select('m_school.schoolName', 'm_schoolbranch.branchName')
->where('m_students.userNo',$userNo)
->get();