Solved

Microsoft SQL Sub  Query - How do I use a "where" clause on a "Sum" column

Posted on 2007-11-29
6
1,247 Views
Last Modified: 2012-06-27
I am using Microsoft SQL Server 2000.

I have the following query below am using the query below:

Select C.ComponentID,

(SELECT     SUM(IsNull(OrderQuantity, 0)) - SUM(IsNull(ReceiveQuantity, 0))
  FROM          PurchaseOrderItemTable I
  WHERE      C.ComponentID = I.ComponentID AND I.ItemStatusID IN (0, 2)) AS ComponentsOnOrder,
(SELECT     SUM(IsNull(Quantity * PT.ProductionQuantity, 0))
  FROM          ProductionItemTable P LEFT OUTER JOIN
  ProductionTable PT ON PT.ProductionID = P.LinkID
  WHERE      C.ComponentID = P.ItemLinkID AND P.ItemTypeID = 1 AND PT.StatusID = 1) AS ComponentsAllocated

From ComponentTable C
  where C.StockHolding = 1
and
(C.StockOnHand - ComponentsAllocated) + ComponentsOnOrder) < C.ReorderLevel

The problem is that I am unable to use the "ComponentsAllocated" or "ComponentsOnOrder" in my final "Where" clause as I get the error message :

"Server: Msg 207, Level 16, State 3, Line 1
Invalid column name 'ComponentsAllocated'.
Server: Msg 207, Level 16, State 1, Line 1
Invalid column name 'ComponentsOnOrder'."

I know the query works as if I remove the last two line all is OK.

The query is used to retun a list of "ComponentID"s from the ComponentTable and the two sub-queries are calculating the Components OnOrder and the Components Allocated from the respective tables for Each Component.

The last two lines of the query only return components that need to be re-ordered.

Any help would be much appreciated.
0
Comment
Question by:saphireneil
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
6 Comments
 
LVL 50

Expert Comment

by:Vitor Montalvão
ID: 20375927
That columns have the same name of your alias to the 2 subqueries.
0
 
LVL 27

Expert Comment

by:MikeToole
ID: 20375954
You are using table alias names rather than column names. Try:
Select C.ComponentID,

(SELECT     SUM(IsNull(OrderQuantity, 0)) - SUM(IsNull(ReceiveQuantity, 0)) As ComponentsOnOrder
  FROM          PurchaseOrderItemTable I
  WHERE      C.ComponentID = I.ComponentID AND I.ItemStatusID IN (0, 2)) AS Table1,
(SELECT     SUM(IsNull(Quantity * PT.ProductionQuantity, 0)) AS ComponentsAllocated
  FROM          ProductionItemTable P LEFT OUTER JOIN
  ProductionTable PT ON PT.ProductionID = P.LinkID
  WHERE      C.ComponentID = P.ItemLinkID AND P.ItemTypeID = 1 AND PT.StatusID = 1) AS Table2

From ComponentTable C
  where C.StockHolding = 1
and
(C.StockOnHand - ComponentsAllocated) + ComponentsOnOrder) < C.ReorderLevel

0
 
LVL 5

Expert Comment

by:usarian
ID: 20376029
You cant reference subqueries in a WHERE clause.

subqueries are processed row by row returned, the where clause designates the criteria to return the row.  You will either have to puyt the whoel subqueries in the where clause or find a way to move the subqueries to JOINs.
0
Instantly Create Instructional Tutorials

Contextual Guidance at the moment of need helps your employees adopt to new software or processes instantly. Boost knowledge retention and employee engagement step-by-step with one easy solution.

 
LVL 5

Expert Comment

by:usarian
ID: 20376119
Try this:

Select C.ComponentID, ComponentsAllocated.Allocated, ComponentsOnOrder.OnOrder
 
From ComponentTable C
 
LEFT OUTER JOIN
(SELECT P.ItemLinkID, SUM(IsNull(Quantity * PT.ProductionQuantity, 0)) AS Allocated
  FROM ProductionItemTable P 
 
LEFT OUTER JOIN
  ProductionTable PT ON PT.ProductionID = P.LinkID
WHERE P.ItemTypeID = 1 AND PT.StatusID = 1)
   AS ComponentsAllocated ON C.ComponentID = ComponentsAllocated.ItemLinkID
 
LEFT OUTER JOIN
(SELECT I.ComponentID, SUM(IsNull(OrderQuantity, 0)) - SUM(IsNull(ReceiveQuantity, 0)) AS OnOrder
  FROM PurchaseOrderItemTable I WHERE I.ItemStatusID IN (0, 2))
   AS ComponentsOnOrder ON C.ComponentID = ComponentsOnOrder.ComponentID
 
  where C.StockHolding = 1 
and
(C.StockOnHand - ComponentsAllocated.Allocated) + ComponentsOnOrder.OnOrder) < C.ReorderLevel

Open in new window

0
 
LVL 25

Accepted Solution

by:
imitchie earned 500 total points
ID: 20376388
What you usually do is wrap the whole thing as another subquery like so
SELECT * FROM
(
Select C.ComponentID,
 
(SELECT     SUM(IsNull(OrderQuantity, 0)) - SUM(IsNull(ReceiveQuantity, 0))
  FROM          PurchaseOrderItemTable I
  WHERE      C.ComponentID = I.ComponentID AND I.ItemStatusID IN (0, 2)) AS ComponentsOnOrder,
(SELECT     SUM(IsNull(Quantity * PT.ProductionQuantity, 0))
  FROM          ProductionItemTable P LEFT OUTER JOIN
  ProductionTable PT ON PT.ProductionID = P.LinkID
  WHERE      C.ComponentID = P.ItemLinkID AND P.ItemTypeID = 1 AND PT.StatusID = 1) AS ComponentsAllocated
 
From ComponentTable C
  where C.StockHolding = 1
) DATA
WHERE (C.StockOnHand - ComponentsAllocated) + ComponentsOnOrder < C.ReorderLevel

Open in new window

0
 

Author Closing Comment

by:saphireneil
ID: 31411817
Apart from a couple of minor syntax changes this is spot on! thanks alot...

I have detailed below the final query below for future ee reference.

Thanks again

Neil :-)

-----------------------------------------------------------------

SELECT * FROM
(
Select C.ComponentID, C.StockOnHand, C.ReorderLevel,
 
(SELECT     SUM(IsNull(OrderQuantity, 0)) - SUM(IsNull(ReceiveQuantity, 0))
  FROM          PurchaseOrderItemTable I
  WHERE      C.ComponentID = I.ComponentID AND I.ItemStatusID IN (0, 2)) AS ComponentsOnOrder,
(SELECT     SUM(IsNull(Quantity * PT.ProductionQuantity, 0))
  FROM          ProductionItemTable P LEFT OUTER JOIN
  ProductionTable PT ON PT.ProductionID = P.LinkID
  WHERE      C.ComponentID = P.ItemLinkID AND P.ItemTypeID = 1 AND PT.StatusID = 1) AS ComponentsAllocated
 
From ComponentTable C
  where C.StockHolding = 1
)
 DATA
WHERE (StockOnHand - ComponentsAllocated) + ComponentsOnOrder < ReorderLevel
0

Featured Post

Creating Instructional Tutorials  

For Any Use & On Any Platform

Contextual Guidance at the moment of need helps your employees/users adopt software o& achieve even the most complex tasks instantly. Boost knowledge retention, software adoption & employee engagement with easy solution.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

This article explains how to reset the password of the sa account on a Microsoft SQL Server.  The steps in this article work in SQL 2005, 2008, 2008 R2, 2012, 2014 and 2016.
For both online and offline retail, the cross-channel business is the most recent pattern in the B2C trade space.
Familiarize people with the process of retrieving data from SQL Server using an Access pass-thru query. Microsoft Access is a very powerful client/server development tool. One of the ways that you can retrieve data from a SQL Server is by using a pa…
Viewers will learn how to use the INSERT statement to insert data into their tables. It will also introduce the NULL statement, to show them what happens when no value is giving for any given column.

739 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question