Identifying through many columns

[jaimate]

I have a huge table with 10m entries. But there is only 500,000 different. The only way to identify each different entry is concatenating many columns. The final result is a 20 characters long, which is not very useful for calculations. I would prefer a number.

Can I create a variable stored in a column that increases every time there is a change in some of the other columns? Is there a way to simplify the 20-characters-long variable?

See the example
ExampleSQL.jpg


SQL on DB2 v9.1



Thanks a million

[hitendrap]

The solution is very simple, you must create a VIEW for that table !!!,
whatever query you are firing to get the above result (shown in screenshot), just type that in CREATE VIEW statement !

[jaimate]

Thanks a million for your response.

What I really mean is that I don't have the column identifier. It is only there to see what I need. How can I get it in SQL?

[hitendrap]

What I've understood is that
you have displayed the values in column "CONCATENATE" by actually contatenating the character values in other columns right ?
& suppose the value of row1 & column 7 changes from A to B then the value will automatically change to B in the "CONCATENATE" column

Still may answer is the same, CREATE a VIEW.

Plz. read how to create a view & more important learn what is a VIEW of a table in relational database.