PostgreSQL – How to Drop A Schema

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…

You can count the number of rows in a table in PostgreSQL using the SELECT COUNT(*) query. Here’s how you can do it: SELECT COUNT(*) FROM table_name; Replace table_name with the name of the table for which you want to count the rows. When you run this query, PostgreSQL will return a single value, which…

You can retrieve the username of the currently logged-in user using the current_user function. SELECT current_user; When you execute this SQL query, it will return the username of the currently logged-in user as a text value. You can use this information in your SQL queries or as part of your application to determine the current…

You can rename a sequence using the ALTER SEQUENCE statement with the RENAME TO clause in PostgreSQL database. Here’s the basic syntax for renaming a sequence: ALTER SEQUENCE old_sequence_name RENAME TO new_sequence_name; where old_sequence_name is the current name of the sequence you want to rename, and new_sequence_name is the new name you want to assign…

You can rename a constraint in PostgreSQL database using the ALTER TABLE statement. Renaming a constraint is useful when you want to give it a more meaningful or descriptive name or if you need to change its name for any other reason. Here’s the basic syntax for renaming a constraint: ALTER TABLE table_name RENAME CONSTRAINT…

The log_rotation_size parameter determines the size at which PostgreSQL’s log files (usually the log file generated by the pg_log system) will be rotated or switched to a new file. Rotating log files helps postgresql database engine to manage the log file size and prevent them from growing too large, which can be particularly useful for…