Error in SQL query

Hello there,

I am trying to sum the columns using subquery but for some reason I am getting error. Can you please help me to resolve the error.
Error I get is
Incorrect syntax near 'a'.

SELECT 
    a.productName,
    a.Branch,
    SUM(a.AvailQty) as AvailableQty
 (
SELECT
    dbo.Tafsil.description as productName,
    dbo.Branch.name as Branch,
    SUM(dbo.Batch.actualQuantity -  dbo.Batch.reservedQuantity) as AvailQty
FROM
    dbo.Batch
INNER JOIN
    dbo.Tafsil
ON
    (
        dbo.Batch.productId = dbo.Tafsil.id)
INNER JOIN
    dbo.Warehouse
ON
    (
        dbo.Batch.warehouseId = dbo.Warehouse.id)
INNER JOIN
    dbo.Branch
ON
    (
        dbo.Warehouse.branchId = dbo.Branch.id) 
        INNER JOIN
    dbo.WarehouseSubType1
ON
    (
        dbo.Warehouse.warehouseSubType1Id = dbo.WarehouseSubType1.id)
GROUP BY
    dbo.Batch.expiryDate,
    dbo.Tafsil.description,
    dbo.Branch.name,
    dbo.WarehouseSubType1.warehouseSubTypeId
        HAVING 
        SUM(dbo.Batch.actualQuantity -  dbo.Batch.reservedQuantity) > 0
        AND  dbo.WarehouseSubType1.warehouseSubTypeId IN (1, 4)
      AND dbo.Batch.expiryDate < dateadd(month,3,getdate())
      )  a
      GROUP BY
       a.productName,
       a.Branch

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zolfAsked:
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Ryan ChongBusiness Systems Analyst , ex-Senior Application EngineerCommented:
quick guess, try:

SELECT
    a.productName,
    a.Branch,
    SUM(a.AvailQty) as AvailableQty
from
 (
SELECT
    dbo.Tafsil.description as productName,
    dbo.Branch.name as Branch,
    SUM(dbo.Batch.actualQuantity -  dbo.Batch.reservedQuantity) as AvailQty
FROM
    dbo.Batch
INNER JOIN
    dbo.Tafsil
ON
    (
        dbo.Batch.productId = dbo.Tafsil.id)
INNER JOIN
    dbo.Warehouse
ON
    (
        dbo.Batch.warehouseId = dbo.Warehouse.id)
INNER JOIN
    dbo.Branch
ON
    (
        dbo.Warehouse.branchId = dbo.Branch.id)
        INNER JOIN
    dbo.WarehouseSubType1
ON
    (
        dbo.Warehouse.warehouseSubType1Id = dbo.WarehouseSubType1.id)
GROUP BY
    dbo.Batch.expiryDate,
    dbo.Tafsil.description,
    dbo.Branch.name,
    dbo.WarehouseSubType1.warehouseSubTypeId
        HAVING
        SUM(dbo.Batch.actualQuantity -  dbo.Batch.reservedQuantity) > 0
        AND  dbo.WarehouseSubType1.warehouseSubTypeId IN (1, 4)
      AND dbo.Batch.expiryDate < dateadd(month,3,getdate())
      )  a
      GROUP BY
       a.productName,
       a.Branch

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zolfAuthor Commented:
thanks!!
Lee SavidgeCommented:
You're missing a FROM in the initial select.
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Query Syntax

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