psql show db - SQL

If you're a programmer working with PostgreSQL, you may be familiar with the psql tool, which allows you to interact directly with your PostgreSQL database from the command line. One of the most useful psql commands is show, which lets you view information about your current database.

Syntax

The basic syntax for the show command in psql is as follows:

\show [ option ]

The option argument can be used to specify what information you want to see about the current database.

Common Usage

Here are some common psql show commands and what they do:

Show all databases

To see a list of all your PostgreSQL databases, use the following command:

\l

This will show you a list of all the databases on the current PostgreSQL server.

Show current database

To see the name of the current database, use the following command:

\connect

This will display the name of the currently connected database. Alternatively, you can use the following command:

\echo :DATABASE

This will display the name of the current database in a format that's better suited for scripts or other automated tools.

Show current user

To see the name of the current PostgreSQL user, use the following command:

\echo :USER

This will display the name of the current user in a format that's better suited for scripts or other automated tools.

Show current schema

To see the name of the current PostgreSQL schema, use the following command:

\echo :SCHEMA

This will display the name of the current schema in a format that's better suited for scripts or other automated tools.

Conclusion

The ability to use show in psql is a powerful tool for any PostgreSQL developer or database administrator. By using this command, you can quickly and easily get information about the current database, user, and schema, which can make debugging and troubleshooting much easier. Use these commands to save time and make your work more efficient!