share | improve this answer | follow | In front of this prompt… The $ starting a command line in the examples below represents your operating system prompt. In this tutorial, you will learn how to connect to PostgreSQL from the command line using psql or pgAdmin. Prompts are configurable so it may well not look like this. This set of commands is taken from the psql command-line tool. Bash is a “Unix shell”: a command-line interface for interacting with the operating system. A basic working knowledge of database management systems and SQL commands for the psql PostgreSQL interface. pgAdmin is a web interface for managing PostgreSQL databases. )-l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS); Most \d commands support additional param of __schema__.name__ and accept wildcards like *. Tables are an example for relations. It listed all the available relations. thegeekstuff=# Note: The above command will take you to the postgreSQL prompt “=#”. This psql command is used to describe available relations in the database. For the syntax of a specific command, use the following command − Some interesting flags (to see all, use -h or --help depending on your psql version):-E: will describe the underlaying queries of the \ commands (cool for learning! That way SQL and psql commands can be freely mixed on a line. Prompt 1 is the normal prompt that is issued when psql requests a new command. I recently started to create UNIX / LINUX Bash Shell script for enhancing my PostgreSQL DBA Work. Source your bash profile with . PostgreSQL must be properly installed and working with access to its psql command line interface in order to execute the psql examples explained in this tutorial. Using psql, you can generate a complete list of commands by using the \help command. In this tutorial, we will learn how to answer these key questions from the command line using psql. First, you should connect to the newly created “thegeekstuff” database using the psql command as shown below. ~/.bashrc or similar. Type your alias from the command line. 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 Create an alias in your bash profile that runs your psql command for you. $ psql thegeekstuff psql (9.6.1) Type "help" for help. Theres an abundance of flags available for use when working with psql, but lets focus on some of the most important ones, then how to connect:-h the host to connect to-U the user to connect with-p the port to connect to (default is 5432) Prompt 2 is issued when more input is expected during command entry, for example because the command was not terminated with a semicolon or a quote was not closed. Use psql to edit, automate, and execute queries in PostgreSQL. Now that you have Postgres installed, open the psql as − Program Files → PostgreSQL 9.2 → SQL Shell(psql). It provides a visual, user-friendly environment with a host of practical solutions that make managing databases easy. But in any case, the arguments of a meta-command cannot continue beyond the end of the line. For example:alias postygresy='psql --host hostname database_name -U username' The values should match those that you inputted to the ~/.pgpass file. $ psql -U sampleuser -h localhost A line starting with # represents a comment. In the following example, we have run \d command on mydb database. It has the ability to run an entire script of commands, known as a “Bash shell script”. On Windows it might look like C:\Program Files\PostgreSQL> but Windows prompts are also configurable. In addition to being able to submit raw SQL queries to the server via psql you can also take advantage of the psql meta-commands to obtain information from the server. * Psql Tweet What is psql. Psql is the interactive terminal for working with Postgres. psql. Meta-Commands. In PostgreSQL \help command set of commands, known as a “ Bash Shell script.. Values should match those that you inputted to the PostgreSQL prompt “ = ”! To run an entire script of commands, known as a “ Bash script! 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