how to get min date in transformer

[developeretl]

Hi,
Here is the scenario. I have populate the column B based on the Column A.
I have get the min date of ColA and compare it to all the dates in Col A and see if it is less then i have populate in Col B to check whether it should be enddated.
Can you anyone please let me know how to implement this logic using transformer ?

A B
8/11/2011
9/1/2011
10/11/2011
11/12/2011
8/11/2011

[ray.wurlod]

Why "using Transformer"? Surely an Aggregator is the correct stage type to get a minimum value. You could also sort the data by date and use a Remove Duplicates to keep only the minimum.

There's also a flaw in your logic.

I have get the min date of ColA and compare it to all the dates in Col A and see if it is less

- It IS! That's what minimum means!

[nagarjuna]

Use aggregator stage & use the option preserve datatype to get the o/p datatype in date or you can also use stage variables in a transformer stage to get the min value..