laravel查询构建器如何求和多个特定列

Question

hello I have a candidate total scores table

sample

I want to add the casual_wear and evening_gown where candidate ID =1

what I got so far

DB::table('total_score')
->select(DB::raw('SUM(casual_wear) as total_scores'))
->where('candidate_number', '=' , '1')
->orderBy('total_scores', 'desc')
->get();

i don't know how to add to different columns pls help, tnx in advance

Answer 1

I want to add the casual_wear and evening_gown where candidate ID =1

Then why can't you just perform addition on those two columns like

select casual_wear + evening_gown as some_alias
from total_score
where candidate_ID =1;

(OR) probably you meant to do a SUM() GROUP BY candidate_ID like

select SUM(casual_wear) as total_scores,
SUM(evening_gown) as total_scores1
from total_score
GROUP BY candidate_ID
order By SUM(casual_wear) desc;