It has the ability to run an entire script of commands, known as a “Bash shell script”. Source your bash profile with . 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. Create an alias in your bash profile that runs your psql command for you. Prompts are configurable so it may well not look like this. I recently started to create UNIX / LINUX Bash Shell script for enhancing my PostgreSQL DBA Work. In this tutorial, we will learn how to answer these key questions from the command line using psql. Bash is a “Unix shell”: a command-line interface for interacting with the operating system. It listed all the available relations. This psql command is used to describe available relations in the database. Use psql to edit, automate, and execute queries in PostgreSQL. For the syntax of a specific command, use the following command − The $ starting a command line in the examples below represents your operating system prompt. thegeekstuff=# Note: The above command will take you to the postgreSQL prompt “=#”. )-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 *. 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! 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) A basic working knowledge of database management systems and SQL commands for the psql PostgreSQL interface. But in any case, the arguments of a meta-command cannot continue beyond the end of the line. Tables are an example for relations. $ psql -U sampleuser -h localhost A line starting with # represents a comment. For example:alias postygresy='psql --host hostname database_name -U username' The values should match those that you inputted to the ~/.pgpass file. Psql Tweet What is psql. Using psql, you can generate a complete list of commands by using the \help command. Type your alias from the command line. pgAdmin is a web interface for managing PostgreSQL databases. 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. In this tutorial, you will learn how to connect to PostgreSQL from the command line using psql or pgAdmin. ~/.bashrc or similar. That way SQL and psql commands can be freely mixed on a line. Meta-Commands. psql. $ psql thegeekstuff psql (9.6.1) Type "help" for help. In front of this prompt… 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. On Windows it might look like C:\Program Files\PostgreSQL> but Windows prompts are also configurable. In the following example, we have run \d command on mydb database. 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 It provides a visual, user-friendly environment with a host of practical solutions that make managing databases easy. Psql is the interactive terminal for working with Postgres. 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