The multi-part identifier could not be bound - sql

Question

SELECT
TOP (100) PERCENT
dbo.bARCM.CustGroup, dbo.bARCM.Customer,
CASE WHEN udJobType IN ('Scheduled Maintenance', 'Unscheduled Emergency',
'Unscheduled Call Out') THEN 'Maintenance'
WHEN udJobType IN ('Scheduled Special Projects', 'UPS Internal Capital Exp')
THEN 'Capital'
WHEN udJobType LIKE '%Turnaround%' THEN 'T/A'
END AS JobType,
CASE WHEN Factor = 1.0 THEN 'ST'
WHEN Factor = 1.5 THEN 'OT'
WHEN Factor = 2.0 THEN 'OT'
END AS STOT,
SUM(dbo.bJBID.Hours) AS Hours,
DATEADD(MONTH, DATEDIFF(MONTH, 0, dbo.bJBID.JCDate), 0) as SortMonth
FROM
dbo.bJBID
INNER JOIN
dbo.bJBIN ON dbo.bJBID.JBCo = dbo.bJBIN.JBCo AND dbo.bJBID.BillMonth = dbo.bJBIN.BillMonth AND dbo.bJBID.BillNumber = dbo.bJBIN.BillNumber
INNER JOIN
dbo.bARCM
INNER JOIN
dbo.bJCCM ON dbo.bARCM.CustGroup = dbo.bJCCM.CustGroup AND dbo.bARCM.Customer = dbo.bJCCM.Customer
INNER JOIN
dbo.JCJMPM ON dbo.bJCCM.JCCo = dbo.JCJMPM.JCCo AND dbo.bJCCM.Contract = dbo.JCJMPM.Contract ON dbo.bJBIN.JBCo = dbo.JCJMPM.JCCo AND
dbo.bJBIN.Contract = dbo.JCJMPM.Contract
INNER JOIN
dbo.bJCCT ON dbo.bJBID.CostType = dbo.bJCCT.CostType AND dbo.bJBID.PhaseGroup = dbo.bJCCT.PhaseGroup
INNER JOIN
dbo.budAcctMonths ON dbo.budAcctMonths.Month = dbo.bJBIN.BillMonth
WHERE
(dbo.bJCCM.JCCo = 1)
AND (dbo.bJBID.CostType IN (1, 41, 42, 43, 44, 45, 46))
AND (dbo.bJBID.CostTypeCategory = 'L')
AND (dbo.JCJMPM.udPlantLocation LIKE 'Deer%')
AND (dbo.bARCM.Name LIKE 'Dow%' OR dbo.bARCM.Name LIKE 'Rohm%')
GROUP BY
dbo.bARCM.CustGroup, dbo.bARCM.Customer,
dbo.JCJMPM.udJobType, dbo.bJBID.Factor, dbo.SortMonth
HAVING
(dbo.bARCM.CustGroup = 1) AND (SUM(dbo.bJBID.Hours) <> 0)
When I excute this query, I get
The multi-part identifier "dbo.SortMonth" could not be bound
error message. I am new to SQL, need some help.

Answer 1

Your SELECT is assigning a alias of SortMonth to the following DATEADD(MONTH, DATEDIFF(MONTH, 0, dbo.bJBID.JCDate), 0) but you cannot use an alias in GROUP BY unless it was named in a subquery.
You will need to change the code to:
GROUP BY dbo.bARCM.CustGroup,
dbo.bARCM.Customer,
dbo.JCJMPM.udJobType,
dbo.bJBID.Factor,
DATEADD(MONTH, DATEDIFF(MONTH, 0, dbo.bJBID.JCDate), 0) -- use the DATEADD code here not the alias