Thanks a lot. I will backup to another file next time

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Hi,

As I understand it then you can't do this. Deleting the...

Good Idea! Thanks a lot

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nope.

use separate files so you have total control on what stays and what goes away

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Thank you very match, Frank. It really helps me a lot. But what shoul I do if I want to use the returned drug names in a sub query?

Thanks a lot Jonathan ! The script helps me to solve the problem. But if I want use the top 10 drug name in a sub-query, I can not use...