Je recommande les grouping sets :
select coalesce(location, 'Total') as location,
coalesce(home_team_name, 'Total') as home_team_name,
sum(case when match_date >= date '2018-01-01' and
match_date < date '2018-02-01'
then 1 else 0
end) as january_2018,
sum(case when match_date >= date '2018-02-01' and
match_date < date '2018-03-01'
then 1 else 0
end) as february_2018,
sum(case when match_date >= date '2018-03-01' and
match_date < date '2018-04-01'
then 1 else 0
end) as march_2018,
sum(case when match_date >= date '2018-01-01' and
match_date < date '2019-01-01'
then 1 else 0
end) as total_2018
from match_results
group by grouping sets ( (location, home_team_name), () );
C'est-à-dire qu'il n'est pas nécessaire de répéter la requête. J'ai également modifié les comparaisons de dates pour utiliser des dates réelles. Je trouve cela plus lisible et maintenable que l'extraction de parties de date.
