Is it possible to use 'case' with and in 'count'? - sql

Question

Is it possible to use case with and in count
SELECT branches.NAME AS agence,
count(
CASE loanstatus
WHEN '1'
AND Datepart(month,loanaccount.issuedate)= 2 THEN 1
ELSE NULL
END )AS nombre_de_credits_demande ,
count(
CASE loanstatus
WHEN '2' datepart(month,loanaccount.chargeoffdate)= 2 THEN 1
ELSE NULL
END )AS nombre_de_credits_approuve
please help me

Answer 1

You can use it with count(). I prefer sum():
select Branches.Name as Agence,
sum(case when LoanStatus = '1' and
datepart(MONTH, LoanAccount.IssueDate) = 2
then 1 else 0
end ) as Nombre_de_Crédits_Demandé ,
sum(case when LoanStatus = '2' and
datepart(MONTH, LoanAccount.IssueDate) = 2
then 1 else 0
end ) as Nombre_de_Crédits_Approuvé
The issue with your code was not the count() versus sum() it is the mixing of two different case syntaxes. When you use case <var> when <val>, you cannot include any other conditions. Just use when with the full conditions that you want.
And, if you like, you can use count() instead of sum().
And, for conciseness, I prefer the month() function:
select Branches.Name as Agence,
sum(case when LoanStatus = '1' and MONTH(LoanAccount.IssueDate) = 2
then 1 else 0
end ) as Nombre_de_Crédits_Demandé ,
sum(case when LoanStatus = '2' and MONTH(LoanAccount.IssueDate) = 2
then 1 else 0
end ) as Nombre_de_Crédits_Approuvé

Answer 2

you can achieve your goal through this query.
select
branches.name as agence
,(select COUNT(1) from <table_name> where loginstatus=1 and Datepart(month,loanaccount.issuedate)= 2) as nombre_de_credits_demande
,(select COUNT(1) from <table_name> where loginstatus=2 and Datepart(month,loanaccount.issuedate)= 2) as AS nombre_de_credits_approuve
from <Table_name>