Discoverer Plus - Lag / Over / Partition By / Order By (Conditional Syntax)

Question

Good morning everybody
I have created the following syntax in Oracle Discoverer Plus and it works amazingly. However, I have a single problem.
This syntax gives me the comparison of two values (for instance: Jan.2010 values & Feb.2010 values). But it does not give me the value of all of the new records (for instance: if there is no values in Jan.2010, then it will not give me the value of Feb.2010). Hence, my report excludes all of the new records values.
If I am not mistaken, the below formulla will not be changed, but it needs some conditional syntax:
1. Compare syntax: if there is two similar records; and
2. Give the values of all the new records without any change in thier values
*(Amount-LAG(Amount,1)OVER(PARTITION BY "Sequence Number"ORDER BY "Sequence Number ASC))*
Thank very much in advance.
Mr. Zuhair Fardan
Kingdom of Bahrain
Email: [email protected]

Answer 1

Zuhair,
change,
(Amount-LAG(Amount,1)OVER(PARTITION BY "Sequence Number"ORDER BY "Sequence Number ASC)){code}
to
{code}
(Amount-LAG(Amount,1,0)OVER(PARTITION BY "Sequence Number" ORDER BY "Sequence Number ASC))Note the extra zero in LAG(Amount,1,0). That's the default return value if nothing is found.
As it is you are subtracting null from the amount and getting null.
Hope that is helpful.
- James