How to execute multiple queries using psql command from bash shell?

Question

I need to execute postgresql queries from command line using psql -c command. For every psql command, it opens a new tcp connection to connect to the database server and exe

Answer 1

-c processes only one command. Without it however psql expects commands to be passed into standard input, e.g.:

psql -U postgres -h   << EOF
SELECT * FROM xyz_table;
SELECT * FROM abc_table;
EOF

Or by using echo and pipes.