Common psql Command Line Options




psql

  • psql is the standard PostgreSQL application to work with databases
  • It uses a superset of standard SQL
  • It can be interactively like DBaccess, or in scripts like sqlcmd

Common psql Command Line Options

  • -A, –no-align: set output to non-aligned, no padding
  • -c sql, –command sql: execute the sql command and then exit
  • -d name, –dbname name: name of database, same as name as the first non-option argument
  • -f name, –file name: use name as the source of commands
  • -o name, –output name: put the output in name
  • -q, –quiet: suppress welcome messages
  • -t, –tuples-only: suppress print column names, result row counters, etc
  • -?, –help: get command line help

Common psql Meta-commands

  • \a: toggle output format (aligned/unaligned)
  • \c name: connect to a database name
  • \copy table: copy a table to/from a file
  • \d : list all tables (display)
  • \d table: show information about a table
  • \e: edit the query buffer
  • \g: execute the query buffer (go)
  • \h command: display help on command
  • \i name: read name into query buffer (input)

Common psql Meta-commands

  • \o name: send output to name
  • \p: display the query buffer
  • \q: quit the program
  • \r: resets (clears) the query buffer
  • \t: toggle the output headers on/off
  • \w name: write the query buffer to name
  • \! command: execute the Linux command
  • \?: help on meta-commands

Interactive psql

  • Typing in a query loads the query buffer
  • The command will not run unless terminated with a semicolon (;)
  • Meta-commands all start with blackslash (\)
  • Exit with \q

psql Examples

 

to start the postgres server

to start the psql cli

Input “help” to get help

Useful sql commands (remember those semi-colons;):

(NOTE: All of the sql commands can be lower case)

View current database:

List all databases:

Create a new database:

Use a database:

Run database schema:

List tables and sequences in your current db:

Delete database:

Quit the cli:

 


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