I have to select data from two tables for APIs.
There are two tables garage_services, and garages. I receive garage_sevices id.
Garage_services table is like this
id | garage_id | service _id
Now from this table I select row based on service_id from here I have to select garage_id and get details about garage from garage table
$garages = $this->db
->select('*')
->from('garage_services')
->join('garage', 'garage_services.id=garage.id')
->where($where)
->get();
Above is the query I came up with, I don't know if its correct. as I am not sure about $where as well.
Please help me with this
Here I have written the query for your solution.
$garages = $this->db->from('garage_services as gs, garages as g')
->where('g.id', $garage_service_id, FALSE)
->get();
Here $garage_service_id is the variable that passed in function argument as you have written you in your question.
Try this
->select('*')
->from('garage_services as t1')
->join('garage as t2', 't1.garage_id = t2.id')
->where('t1.id', $service _id)
->get();
As per the detail is given in the question your query look correct and for the where condition:
$this->db->select('*');
$this->db->from('table1');
$this->db->join('table2', 'table1.col1 = table2.col1');
$this->db->where('table1.col1', 2);
$query = $this->db->get();
Related
I'm really getting confused with the join on laravel.
I got a users table and got a students_subjects table, in the students_subjects table I got a subject_id column and a user_id column, I'm trying to get the users list by the user_id at the teachers_subjects table with the same subject_id column at the students_subjects.
I've tried :
$user_id = Auth::user()->id;
$results = DB::table('users')
->join('students_subjects', 'students_subjects.subject_id', '=', 'teachers_subjects.subject_id')
->where('students_subjects.user_id', $user_id)
->get();
but I got some errors... would be great if someone can show me the way it should be done so I can understand how to do the joins work at laravel.
structures:
users table :
- id
- name
- last name
students_subjects :
- subject_id
- user_id (users->id)
teachers_subjects :
- subject_id
- teacher_id (users->id)
You need to add a join for both tables:
$user_id = Auth::user()->id;
$results = DB::table('users')
->join('students_subjects', 'users.id', '=', 'students_subjects.user_id')
->join('teachers_subjects', 'students_subjects.subject_id', '=', 'teachers_subjects.subject_id')
->where('students_subjects.user_id', $user_id)
->get();
You may have to tweak this to get exactly what you're looking for.
If you don't know to use laravel eloquent queries then you can execute raw queries using laravel if you are comfortable with it
$cards = DB::select("SELECT * FROM TABLE");
This way you can easily run your queries without any other RND
My forum Dashboard
I got 2 tables forum_category and forum_topics. the problem is that the
the latest post is not accurate... I don't know the query for it.
Can anyone help me ?
The sample output is on the image ... I'm using codeigniter for that
The category contains columns id,name,desc
topic contains of columns of id,subject,desc,date_posted and posted_by
Query:
$select = array(
'forum_category.f_cat_name',
'forum_category.f_cat_id',
'forum_category.f_cat_desc',
'forum_topic.topic_subject as last_posted',
'max(forum_topic.date_posted) as last_date_posted',
'max(forum_topic.posted_by) as last_posted_by',
'count(forum_topic.topic_id) as total'
);
$query=$this->db
->select($select)
->from('forum_category')
->where('f_cat_type',1)
->where('f_cat_status',1)
->join('forum_topic','forum_topic.f_cat_id = forum_category.f_cat_id','inner')
->group_by('forum_category.f_cat_id')
->get();
return $query->result();
Join clause should come before where clause.
try this,
$query=$this->db
->select($select)
->from('forum_category')
->join('forum_topic','forum_topic.f_cat_id = forum_category.f_cat_id','inner')
->where('f_cat_type',1)
->where('f_cat_status',1)
->group_by('forum_category.f_cat_id')
->get();
return $query->result();
I'm new to laravel and I have some issues with the query builder.
The query I would like to build is this one:
SELECT SUM(transactions.amount)
FROM transactions
JOIN categories
ON transactions.category_id == categories.id
WHERE categories.kind == "1"
I tried building this but it isn't working and I can't figure out where I am wrong.
$purchases = DB::table('transactions')->sum('transactions.amount')
->join('categories', 'transactions.category_id', '=', 'categories.id')
->where('categories.kind', '=', 1)
->select('transactions.amount')
->get();
I would like to get all the transactions that have the attribute "kind" equal to 1 and save it in a variable.
Here's the db structure:
transactions(id, name, amount, category_id)
categories(id, name, kind)
You don't need to use select() or get() when using the aggregate method as sum:
$purchases = DB::table('transactions')
->join('categories', 'transactions.category_id', '=', 'categories.id')
->where('categories.kind', '=', 1)
->sum('transactions.amount');
Read more: http://laravel.com/docs/5.0/queries#aggregates
If one needs to select SUM of a column along with a normal selection of other columns, you can sum select that column using DB::raw method:
DB::table('table_name')
->select('column_str_1', 'column_str_2', DB::raw('SUM(column_int_1) AS sum_of_1'))
->get();
You can get some of any column in Laravel query builder/Eloquent as below.
$data=Model::where('user_id','=',$id)->sum('movement');
return $data;
You may add any condition to your record.
Thanks
MyModel::where('user_id', $_some_id)->sum('amount')
I have a table video with fields videoid, genre(int-foreign key), language(int-foreign key) etc. I want to get the value of genre from genre table and language from movie_languages table.
The structure of tables are given below:
video
genre
movie_languages
How can I join these 3 tables to get the language and genre related to each videos in video table. Also when user didn't select genre/language in the form, value 0 will be inserted to the table. Will this affect the query. I am using codeingiter and I tried with the following query and is not working.
$this->db->select('video.*,movie_languages.language,genre.genre');
$this->db->join('genre', 'video.genre = genre.id');
$this->db->join('movie_languages', 'video.language = movie_languages.id');
$query = $this->db->get();
Please help me.
Thanks in advance.
It will be, you need a left join in this case
Try this
$query = $this->db
->select('v.*,ml.language,g.genre')
->from('video as v')
->join('movie_languages AS ml', 'v.language = ml.id', 'left outer')
->join('genre AS g', 'v.genre = g.id', 'left outer')
->get();
try this
$this->db->select('video.*,movie_languages.language,genre.genre')
->from('video')
->join('genre', 'video.genre = genre.id')
->join('movie_languages', 'video.language = movie_languages.id');
$query = $this->db->get();
I have the following query:
$this->db
->select('SQL_CALC_FOUND_ROWS null as rows
,table1.*
,table2.*
,table3.*', FALSE)
->from('table1')
->where('table1.column1', $user_id)
->join('table2', 'table2.column2 = table1.column2')
->join('table3', 'table3.column2 = table1.column2')
->group_by('table1.column2')
->order_by('table1.column2', 'DESC');
$query = $this->db->get();
The problem is, there may not be a row in table 3 and if there is not, I would still like to return a result with the remainder of the query data. Please could someone advise how to achieve this?
you should do a left join on table3
Use left join and also use group_by to get exact records:
$this->db->join('login_ranknames AS t4', 't4.id = t1.rank', 'left');
$this->db->group_by('t4.id');