To create a new user in PostgreSQL, you can use the CREATE USER SQL command. Below is the basic syntax: CREATE USER username [WITH PASSWORD ‘password’]; where username is the desired username for the new user, and [WITH PASSWORD ‘password’] is optional. If you include the password, the user will be created with that password….

To add a new column to an existing table in PostgreSQL, you can use the ALTER TABLE statement. Below is the basic syntax of adding a new column: ALTER TABLE table_name ADD COLUMN new_column_name data_type; where table_name is the name of the table to which you want to add the new column. new_column_name is the…