compre toata in where clue oracle

hi am geting this error in this query invalid identifie
select itemN0, item_in_qty - nvl(qty_out,0)qty from employee,dept  
where employee.deptid = dept.deptid  
and qty > dept_qty --how can i compare the  

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chalie001Asked:
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Pawan KumarConnect With a Mentor Database ExpertCommented:
Try..

select itemN0, item_in_qty - nvl(qty_out,0) qty from employee,dept  
where employee.deptid = dept.deptid  
and (  item_in_qty - nvl(qty_out,0) )  > dept_qty

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Try 2..


SELECT * FROM
(
	select itemN0, item_in_qty - nvl(qty_out,0) qty from employee,dept  
	where employee.deptid = dept.deptid  
)
WHERE qty > dept_qty

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0
 
Ryan ChongConnect With a Mentor Commented:
try:

select itemN0, item_in_qty - nvl(qty_out,0) qty from employee,dept  
where employee.deptid = dept.deptid  
and item_in_qty - nvl(qty_out,0) > dept_qty

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0
 
Naveen KumarProduction Manager / Application Support ManagerCommented:
I just wanted to mentioned that it is giving an error because it could not refer to the column alias qty in the where clause which you have used in the select.

As mentioned, you need to use the expression itself in the where clause or use an inline view query.

Thanks,
0
 
chalie001Author Commented:
correct solution
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