How to use union query in laravel - php

Question

I have a query in core php but i want to convert into Laravel, i am trying to do but that is giving the error. I don't know the exact method which i can use for this
here is the core query
select mon,year,
combo,
registered,
forwardedbycmo,
clarification,
noaction,
disposed,mon_srno,undertaken
from monthly_activities
union
select extract('month' from actiondate) as mon,extract('year' from actiondate) as year,
extract('year' from actiondate)|| '-' ||to_char(to_timestamp (extract('month' from actiondate)::text, 'MM'), 'TMMon') as combo,
sum(case when actioncode = '00' then 1 else 0 end) as registered,
sum(case when actioncode = '4T' and fromorg='CMOFF' then 1 else 0 end) as forwardedbycmo,
sum(case when actioncode = '4D' and fromorg='CMOFF' then 1 else 0 end) as clarification,
sum(case when actioncode = '10' then 1 else 0 end) as noaction,
sum(case when actioncode = '50' then 1 else 0 end) as disposed,null as mon_srno,
sum(case when actioncode = '40' and fromorg='CMOFF' then 1 else 0 end) as undertaken
from actionhistory where extract(month from actiondate)=extract(month from current_date)
and extract(year from actiondate)=extract(year from current_date)
group by mon,year order by year,mon;
and laravel query is
$first = MonthlyActivity::select('mon','year','combo','registered','forwardedbycmo',
'clarification',
'noaction',
'disposed','mon_srno','undertaken')->get();
$second = MonthlyActivity::select(extract('month' from actiondate) as mon,extract('year' from actiondate) as year,
extract('year' from actiondate)|| '-' ||to_char(to_timestamp (extract('month' from actiondate)::text, 'MM'), 'TMMon') as combo,
sum(case when actioncode = '00' then 1 else 0 end) as registered,
sum(case when actioncode = '4T' and fromorg='CMOFF' then 1 else 0 end) as forwardedbycmo,
sum(case when actioncode = '4D' and fromorg='CMOFF' then 1 else 0 end) as clarification,
sum(case when actioncode = '10' then 1 else 0 end) as noaction,
sum(case when actioncode = '50' then 1 else 0 end) as disposed,null as mon_srno,
sum(case when actioncode = '40' and fromorg='CMOFF' then 1 else 0 end) as undertaken
from actionhistory where extract(month from actiondate)=extract(month from current_date)
and extract(year from actiondate)=extract(year from current_date))->groupBy('mon','year')->orderBy('year','mon')->get();
$result = $first->union($second);
//$users = DB::table('users')->whereNull('last_name')->union($first)->get();
return view('show',['monthly' => $result]);

Answer 1

As per your question title, here is union reference for Laravel.
But seeing your problem as you have used native sql functions such as extract(), I will advise you to run query as raw query.
For heads up:
You use: $var = DB::connection()->getPdo()->quote($var);
to escape any variable you are using in query.
Prepare your raw query and put it in a variable like:
$query = 'SELECT ....';
Then you run it like:
$result = DB::select($query,[]);
Dont forget to include DB class at top of controller:
use Illuminate\Support\Facades\DB;
I am sorry I cannot give a lot of time to actually make a laravel query for you, so I suggested here which might help you go on.Good Luck!