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+# psql
+
+> PostgreSQL command-line client
+
+- Connect to database. It connects to localhost using default port *5432* with default user.
+
+`psql {{database}}`
+
+- Connect to database on given server host running on given port with username given
+
+`psql -h {{host}} -p {{port}} -U {{username}} mydb`
+
+- Run query against the given database
+
+`echo '{{query}}' | psql {{database}}`
+
+or
+
+`psql -c '{{query}}' {{database}}`