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Get the input from the user say '123' (It varies)

Then i want to connect to a database say "D1"
then i want th extract from the database by giving "select * from tablename where input = '123'

I also want to connect to another database "D2"
then i want th extract from the database by giving "select * from tablename where input = '123'

output should be displayed on the screen as it is when i execute the select statements individually.
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This is what i want to do in a script

Can you show a script for that(For eg)?