Pass query in command line
SYNTAX
psql -U <user_name> -p <port> -d <database_name> -c “<query>“
psql -U postgres -p 5432 -d test -c "select * from test"
PASS QUERY FILE IN COMMAND IN POSTGRESQL
psql -U <user_name> -p <port> -d <database_name> -f “<file_path>”
Step 1: Create text file a.txt and write query which you want to execute.
psql -U postgres -p 5432 -d test -f a.txt