Parece que você simplesmente precisa modificar seu
HAVING
cláusula, para filtrar casos em que balance
é maior que zero (Devedor) OU balance
é menor que zero (Credor). Você também pode usar condicional
IF()
expressões para determinar dr/cr no balance
coluna. Para obter Devedores só:
SELECT client_id,
Sum(Coalesce(CASE
WHEN action_type = 'dr' THEN amount
end, 0)) AS total_debits,
Sum(Coalesce(CASE
WHEN action_type = 'cr' THEN amount
end, 0)) AS total_credits,
Sum(Coalesce(CASE
WHEN action_type = 'cr' THEN amount
end, 0)) - Sum(Coalesce(CASE
WHEN action_type = 'dr' THEN
amount
end, 0)) AS total_debtors,
IF(Sum(Coalesce(CASE
WHEN action_type = 'cr' THEN amount
end, 0)) - Sum(Coalesce(CASE
WHEN action_type = 'dr' THEN
amount
end, 0)) > 0, 'dr', 'cr') AS balance
FROM tbl_balancesheet
GROUP BY client_id
HAVING balance = 'dr' AND total_debtors <> 0
Para obter Credores só:
SELECT client_id,
Sum(Coalesce(CASE
WHEN action_type = 'dr' THEN amount
end, 0)) AS total_debits,
Sum(Coalesce(CASE
WHEN action_type = 'cr' THEN amount
end, 0)) AS total_credits,
Sum(Coalesce(CASE
WHEN action_type = 'cr' THEN amount
end, 0)) - Sum(Coalesce(CASE
WHEN action_type = 'dr' THEN
amount
end, 0)) AS total_debtors,
IF(Sum(Coalesce(CASE
WHEN action_type = 'cr' THEN amount
end, 0)) - Sum(Coalesce(CASE
WHEN action_type = 'dr' THEN
amount
end, 0)) > 0, 'dr', 'cr') AS balance
FROM tbl_balancesheet
GROUP BY client_id
HAVING balance = 'cr' AND total_debtors <> 0