![]() ![]() Suppose, you are in the datacamp_tutorials database and you want to describe the table named countries. This is often referred to as describing a table. Say, you want to view the structural details of a particular table. Now, let's see if it has any tables with the \dt command -Īs you can see datacamp_tutorials database has the following four tables. Suppose, you want to switch to a database named datacamp_tutorials you can do so like the following - `\c datacamp_tutorials` Let's switch to another database and see if it has any tables created in it. Enlisting the Available Tables in the Current Databaseīut unfortunately, the postgres database does not have any tables created in it (tables are referred to as relations in the database management literature). Now, let's see the list of available tables in the current database. You can use the \l command to get a list of all available databases.Īs you can see, I have the following databases. Let's see if any other database exists within this local PostgreSQL server. As you can see, the prompt is now set to the default postgres database. This is referred to as the psql shell which gives you the psql prompt. ![]() On Windows, you can just type psql on the Start Menu Search Bar, and you should be able to navigate to it. This article will help you get PostgreSQL installed. Before you proceed, make sure you have PostgreSQL installed (preferably a version >= 9.4). In addition, psql provides a number of meta-commands and various shell-like features to facilitate writing scripts and automating a wide variety of tasks.Īs mentioned, you will be learning the ten most useful psql commands in this tutorial. Alternatively, input can be from a file or from command line arguments. It enables you to type in queries interactively, issue them to PostgreSQL, and see the query results. Psql is a terminal-based front-end to PostgreSQL. In case, you are wondering what psql is this excerpt from the official site of PostgreSQL talks about psql in an elegant way. If you want to know how to do this, you can read this article. You can use this backup file and restore it in your PostgreSQL server. You might want to have an already well-formed database for following along with this tutorial. Intro to SQL for Data Science by DataCamp.Feel free to refresh the basics with the following resources: Note: This tutorial assumes that you are already familiar with SQL (which is a general language for interacting with RDBMSs) and PostgreSQL. You will start by learning how to retrieve the list of databases residing at a PostgreSQL server and slowly, you will proceed towards more intermediate stuff. With psql, apart from executing SQL queries, you get more functionalities and some of which you will be learning in this tutorial. pgAdmin, on the other hand, provides a graphical interface for operating with databases in PostgreSQL. The default installation of PostgreSQL comes with a psql prompt which is the terminal-like interface of PostgreSQL. However, there are a number of queries you can run to get roughly equivalent data.PostgreSQL is one of the most well accepted open-source RDBMSs out there. There is no central place in PostgreSQL to get all of the information obtained by running show engine InnoDB status in MySQL. Show what queries are currently running in the DBĭisplays the current setting of run-time parameters This will provide the sql used to create a table. No direct equivalent, use below command from shell: Shows the columns, types, modifiers, indexes, and tables referenced by keys. ![]() List all the tables in the current schema View all of the defined databases on the server ![]() Pg_top is a PostgreSQL interactive monitoring utility, similar to the Unix top utility, providing a dynamically updated view of activity within a PostgreSQL database Restore a PostgreSQL database from an archive file created by pg_dump MySQLĮxtract a PostgreSQL database cluster into a script fileĮxtract a PostgreSQL database into a script file or other archive file Below is a table of some of the frequently used commands. In this blog post, I’ve associated several PostgreSQL commands with what I know in MySQL. ![]()
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