LKBEN11002: Howto query postgresql from a bash commandline with psql

Symptom

You need to query postgresql and use the result in a bash script

Cause

none

Solution

You can use the psql command to do the job and let it write the result on the screen. e.g.

psql -d testdb -c "select * from testtable"

This will deliver the result on the screen. To pipe it into a file you use:

psql -d testdb -c "select * from testtable" -o /tmp/testresult.txt

You can read the file in your bash script.

Disclaimer:

The information provided in this document is intended for your information only. Lubby makes no claims to the validity of this information. Use of this information is at own risk!

About the Author

Author: Wim Peeters - Keskon GmbH & Co. KG

Wim Peeters is electronics engineer with an additional master in IT and over 30 years of experience, including time spent in support, development, consulting, training and database administration. Wim has worked with SQL Server since version 6.5. He has developed in C/C++, Java and C# on Windows and Linux. He writes knowledge base articles to solve IT problems and publishes them on the Lubby Knowledge Platform.