Postgres in bash-mode

Hi,

I hope, that this is not too off topic for this list, but anyway, it
should be easy for any PG-expert.

I need to run a shell script that logs in to Postgresql, executes a
query and logs off again.

In MySQL, I did it like this:

'mysql -u user -ppassword < script.sh'

My problem is that I can't find a way to put the password in an 'psql'
statement at the prompt.

Any suggestions are welcome!

mfg
ALEX

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