MySQL get different SUMs based on dates - mysql

Question

I'm trying to create a Sql query where I can sums for 4 different date range.
SELECT t.TenantID, t.TenantFName, t.TenantLName, u.UnitName,
TotalDebit, HousingDebit, TotalCredit, HousingCredit
FROM Tenants t
JOIN Units u ON t.UnitID = u.UnitID
LEFT JOIN (
Select
TenantID,
SUM(CASE WHEN TransactionTypeID = 1 AND ChargeTypeID != 6 THEN TransactionAmount ELSE 0 END) AS TotalDebit,
From TenantTransactions
Where TenantTransactionDate BETWEEN /* Here is my issue */
Group By TenantID
) sums ON sums.TenantID = t.TenantID
Where t.Prospect = 2
AND t.PropertyID = 10
I am trying to return 4 sums:
For the last 30 days
For last 30-60 days
For last 60-90 days
Greater than 90 days ago
Does it make sense?
Thanks

Answer 1

You're looking for totals based on the age of the transaction. We can get that by subtracting the transaction date from today to get a result in days:
datediff(now(), TenantTransactionDate)
You want to group that into period by 30 days, so we use integer division to get a period:
datediff(now(), TenantTransactionDate) DIV 30
And lastly, you want everything over 90 days grouped together:
if(datediff(now(), TenantTransactionDate)<90, datediff(now(), TenantTransactionDate) DIV 30, 3)
This last expression returns a value of 0, 1, 2 or 3. We can use that to group the transactions, and total them:
SELECT TenantID,
sum(TransactionAmount) as totalDebit,
if(datediff(now(), TenantTransactionDate)<90, datediff(now(), TenantTransactionDate) DIV 30, 3) as period
FROM TenantTransactions
where TransactionTypeID=1 and chargeTypeID != 6
group by tenantID, period
order by tenantID, period
Now you should be able to plug that back into your original query, and sort them:
SELECT t.TenantID, t.TenantFName, t.TenantLName, u.UnitName,
TotalDebit, HousingDebit, TotalCredit, HousingCredit
FROM Tenants t
JOIN Units u ON t.UnitID = u.UnitID
LEFT JOIN (
SELECT TenantID,
sum(TransactionAmount) as totalDebit,
if(datediff(now(), TenantTransactionDate)<90, datediff(now(), TenantTransactionDate) DIV 30, 3) as period
FROM TenantTransactions
where TransactionTypeID=1 and chargeTypeID != 6
group by tenantID, period
) sums ON sums.TenantID = t.TenantID
Where t.Prospect = 2
AND t.PropertyID = 10
order by t.tenantID, sums.period