PostgreSQL – How to List All Databases

To rename a table in PostgreSQL, you can use the ALTER TABLE statement with the RENAME TO clause. Here’s the basic syntax: ALTER TABLE current_table_name RENAME TO new_table_name; Replace current_table_name with the name of the table you want to rename, and replace new_table_name with the new name you want to give to the table. Here’s…

To retrieve a list of all schemas in a PostgreSQL database, you can use the following SQL query: SELECT schema_name FROM information_schema.schemata; This query queries the information_schema.schemata view, which contains information about all the schemas in the current database. When you execute this query, it will return a list of schema names present in the…

You can change the current role within a database session in PostgreSQL database using SET ROLE statement . Changing the role allows you to temporarily assume the permissions and privileges associated with a different role, which can be useful for specific tasks or actions that require different access rights. This can be particularly helpful in…

You can drop a sequence using the DROP SEQUENCE command. Here’s the basic syntax to drop a sequence: DROP SEQUENCE [ IF EXISTS ] sequence_name [, …] [ CASCADE | RESTRICT ]; Here are some examples of using the DROP SEQUENCE command: Drop a sequence without checking for dependencies: DROP SEQUENCE my_sequence; Drop a sequence…

To drop (delete) a table in PostgreSQL, you can use the DROP TABLE statement. Here’s the basic syntax: DROP TABLE table_name; where table_name is the name of the table you want to drop. Here’s an example of how to use this syntax to drop a table named my_table: DROP TABLE my_table; Be very cautious when…

To revoke superuser privileges from a user in PostgreSQL, you’ll need to connect to the PostgreSQL database server as a superuser, typically the “postgres” user. Here are the steps to revoke superuser privileges: Log in as the PostgreSQL superuser: Open a terminal and log in as the PostgreSQL superuser, usually named “postgres.” You can do…