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I have to pick the first record of a table. Then I need to compare a date field in the first record with the corresponding date field in the second record. Based on the comparison I will do some transformations. Then I will compare the first with the third, then the fourth and so on.

At the end of comparing with all the records, I will take the second record and compare with the third, fourth and so.

Is there any way to do this?

Thanks.

please guys...suggestions?

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There is no such thing as the first row in a table. It is one of the fundamental tenets of database theory that order of storage is irrelevant. This makes the remainder of your question/requirement flawed.

you can use stage variable of transformer stage to do the above operation. I have read from IBM datastage handbook that stage variables are mainly used for 1. handling NULL values in a transformer
2.comparing a current record.coulmn value with previous record.column value . I am just giving you the hint but i donot know how exactly it can be done.

Hi Joe,
I did not understand exactly what you want to achieve. Are you looking for duplicate records.

You may identify record order (1st and 2nd), if you have primary key defined in the table and using surrogate key or sequence number (in increasing order). But order may not be that imporatant as you want to compare every record with the rest.

Without knowing exact purpose, it is hard to tell.

Some of the things, like finding duplicates can be easily achieved using SQL statement at database level.

- Pavan