Listing DatabasesĪ single Postgres server process can manage multiple databases at the same time. They are denoted by a backslash and then followed by the command and its arguments. Meta-commands are commands that are evaluated by psql and often translated into SQL that is issued against the system tables on the server, saving administrators time when performing routine tasks. 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. In this tutorial, we will learn how to answer these key questions from the command line using psql. This involves asking questions like “Which databases reside on this server?” or “What tables are stored in a particular database on this server?”. One of the most common tasks a database administrator performs is simply getting familiar with the environment. However, Postgres itself comes bundled with a powerful command line tool called psql which is great for those familiar with the terminal or looking to script administration tasks. Once a database is created using either of the above-mentioned methods, you can check it in the list of databases using \l, i.e.When it comes to administering Postgres databases, there’s a wide variety of third party tools available such as SQL Workbench/J or pgAdmin III. Hence, provide a password and proceed to create your new database The above given command will prompt you for password of the PostgreSQL admin user, which is postgres, by default. Go to the bin directory and execute the following command to create a database.Ĭreatedb -h localhost -p 5432 -U postgres testdb Open the command prompt and go to the directory where PostgreSQL is installed. Specifies the TCP port or the local Unix domain socket file extension on which the server is listening for connections.įorce createdb to prompt for a password before connecting to a database. Specifies the host name of the machine on which the server is running. Show help about createdb command line arguments, and exit. Specifies the template database from which to build this database. Specifies the locale to be used in this database. Specifies the character encoding scheme to be used in this database. Specifies the default tablespace for the database.Įcho the commands that createdb generates and sends to the server. The following table lists the command line arguments createdb accepts − S. Specifies a comment to be associated with the newly created database.Ĭommand-line arguments, which createdb accepts. The table given below lists the parameters with their descriptions. The syntax for createdb is as shown below −Ĭreatedb ] The only difference between this command and SQL command CREATE DATABASE is that the former can be directly run from the command line and it allows a comment to be added into the database, all in one command. PostgreSQL command line executable createdb is a wrapper around the SQL command CREATE DATABASE. The following is a simple example, which will create testdb in your PostgreSQL schema Where dbname is the name of a database to create. The basic syntax of CREATE DATABASE statement is as follows − By default, the new database will be created by cloning the standard system database template1. This command will create a database from PostgreSQL shell prompt, but you should have appropriate privilege to create a database. Using createdb a command-line executable.PostgreSQL provides two ways of creating a new database − This chapter discusses about how to create a new database in your PostgreSQL.
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