Final answer:
The command in question is an SQL statement used in the field of Computers and Technology to create a new database named 'gmu' only if it does not already exist, thus preventing errors during database creation attempts.
Step-by-step explanation:
The correct answer is option Computers and Technology. The command CREATE DATABASE IF NOT EXISTS gmu is part of SQL syntax used to create a new database.
When executed, it checks if a database named gmu already exists. If it does, the command does nothing; if it does not, it creates the new gmu database.
This command prevents an error from being thrown if the database already exists, which is a handy feature for scripts that need to be idempotent (produce the same outcome without any negative consequences even if they are run multiple times).
It's a core concept in database management, reflecting an understanding of conditional logic within SQL, an essential skill in the field of database administration and development.
The correct answer is option
This SQL command is used to create a new database named gmu if it does not already exist. If a database with the name gmu already exists, the command will not give an error and will not create a duplicate database.
Example:
If we execute the gmu; command and a database named gmu does not exist, a new database will be created. However, if a database named gmu already exists, no action will be taken.