TSQL Subquery related - sql-server

Question

SELECT DT.TenantDescription
,DT.PropertyNumber
,DT.UnitNo
,DT.AdressLn1
,DT.AddressLn2
,DT.AddressSituation
,(
CASE
WHEN DT.TransactionCode = 1
THEN DT.New_TransactionValue
ELSE 0
END
) AS RentDue
,(
CASE
WHEN DT.TransactionCode = 2
THEN DT.New_TransactionValue
ELSE 0
END
) AS OTHERSUMSDUE
,(
CASE
WHEN DT.TransactionCode = 3
THEN DT.New_TransactionValue
ELSE 0
END
) AS ARREARSBFWD
,(
CASE
WHEN DT.TransactionCode = 4
THEN DT.New_TransactionValue
ELSE 0
END
) AS ARREARSCFWD
,(
CASE
WHEN DT.TransactionCode = 5
THEN DT.New_TransactionValue
ELSE 0
END
) AS IRRECOVERABLERENT
,(
CASE
WHEN DT.TransactionCode > 5
THEN DT.New_TransactionValue
ELSE 0
END
) AS Expenditure
FROM (
SELECT * * (
SELECT New_TenantNameOnly
FROM New_Rentmaster Rm
WHERE Rm.New_rentmasterId = PD.new_rentmasterid
) AS TenantDescription
,* * (
SELECT [New_UnitNumber]
FROM new_propertyunits NPU
WHERE NPU.[New_propertyunitsId] = PD.[new_unitnumberid]
) AS UnitNo
,(
SELECT New_AddressLine1
FROM New_address
WHERE New_addressId = (
SELECT New_addressid
FROM New_PropertyMaster PM
WHERE PM.new_propertymasterid = PD.[new_propertynumbernameid]
)
) AS AdressLn1
,(
SELECT New_AddressLine2
FROM New_address
WHERE New_addressId = (
SELECT New_addressid
FROM New_PropertyMaster PM
WHERE PM.new_propertymasterid = PD.[new_propertynumbernameid]
)
) AS AddressLn2
,(
SELECT TT.[New_TransactionTypeCode] AS TransactionCode
FROM New_transactiontype TT
WHERE [New_transactiontypeId] = PD.[new_transactioncodenameid]
) AS TransactionCode
,(
SELECT New_PropertyNumber
FROM New_PropertyMaster PM
WHERE PM.new_propertymasterid = PD.[new_propertynumbernameid]
) AS PropertyNumber
,(
SELECT New_UnitAddressIdName
FROM New_propertyunits NPU
WHERE NPU.[New_propertyunitsId] = PD.[new_unitnumberid]
) AS AddressSituation
,PD.New_TransactionValue
FROM New_PropertyDetails PD
) AS DT
The above piece of code works fine
Now I want to make changes to the above column (the name is aliased to TenantDescription)
where I want to replace the above column with the following code
Select New_TenantNameOnly from New_Rentmaster Rm
New_TenantNumber IN
(Select MAX(New_TenantNumber) from new_rentmaster GROUP BY [New_Unit_No],[New_Propety_Number])
then it gives me an error
Subquery returns more than one value
This code is supposed to return more than one value
So what should I do about it >??

Answer 1

If you're wanting to bring back multiple results, you ought to be thinking about using joins rather than subqueries. An Inner Join looks something like this:
SELECT *
FROM HumanResources.Employee AS e
INNER JOIN Person.Person AS p
ON e.BusinessEntityID = p.BusinessEntityID
this will produce as many rows as can be produced by matching rows from each table based on the ON condition (e.g. if there are two rows in Employee with BusinessEntityID of 1, and three rows in Person with BusinessEntityID of 1, the above will produce six rows in the result set where BusinessEntityID is 1)