Summing over multiple fields in Laravel - php

Question

I'm wondering if it is possible to take the sum of multiple fields in one query using the fluent query builder.
I currently have two tables: events and attendees. Attendees belong to events and have two fields: total_raised and total_hours. What I want to do is select all events and the total amount raised/total number of hours spent on that event. Now, if I were just using SQL I would do something to the effect of:
SELECT Event.id, sum(Attendees.total_raised), sum(Attendees.total_hours)
FROM Events JOIN Attendees ON Events.id = Attendees.event_id
GROUP BY Event.id
However, I can't seem to find a way to take multiple sums at once using the fluent query builder. Is there any way to do what I'm trying to do using fluent, or should I just make it a raw SQL query?

Answer 1

You can use sum() i.e.:
$q = DB::table('events')
->join('attendees', 'events.id', '=', 'attendees.event_id')
->sum('total_raised')
->sum('total_hours');
If that doesn't work you can try:
...
->get(
array(
'events.id',
DB::raw('SUM(attendees.total_raised)'),
DB::raw('SUM(attendees.total_hours)')
)
);

Answer 2

Building on simones answer. You could do this by essentially running two queries.
$query = DB::table('events')->join('attendees', 'events.id', '=', 'attendees.event_id');
$raised = $query->sum( 'total_raised' );
$hours = $query->sum( 'total_hours' );
It depends on the situation. If it were on the admin/CMS side of things I'd be lean towards this solution. If it is on the front end it should be done in a single query which will be faster. Depending on the content it may or may not be a significant difference.
$result = DB::table('events')->join('attendees', 'events.id', '=', 'attendees.event_id')
->get( array(
DB::raw( 'SUM(attendees.total_raised) AS raised' ),
DB::raw( 'SUM(attendees.total_hours) AS hours' ),
));

Answer 3

I am writing this answer to help those who are in search to sum multiple fields in a single table.
If you want to sum multiple fields inside a single table so there would be no need to "join" you can simply do it likewise, assuming the table like this.
In your controller do this:
$billInfo= Bills::where('reports_id',2)->get( array(
DB::raw('SUM(Price) as total_price'),
DB::raw('SUM(balance) as total_balance'),
DB::raw('SUM(paid) as total_paid'),
));
this will result the below data:
[{"total_price":17500,"total_balance":17500,"total_paid":null}]

Answer 4

I am doing the same thing in my project, Here is the solution which I found. I am using Laravel 5.2 Eloquent here is the Eloquent statement.
This statement which I use in my project, Please made change according to your need.
$result = self::select("*", DB::raw('SUM(auction_amount) as total_auction_amount') , DB::raw('SUM(commission_amount) as total_commission_amount'),
DB::raw('SUM(deposit_amount) as total_deposit_amount'))
->groupBy('cp_user_id')
->get()
->toArray();
Same way you can use for your query like
$result = self::select("*", DB::raw('SUM(auction_amount) as total_auction_amount') , DB::raw('SUM(Attendees.total_raised) as total_raised'),
DB::raw('SUM(Attendees.total_hours) as total_hours'))
->with('Attendees')
->groupBy('id')
->get()
->toArray();