China launched the Chang'e-6 probe on a mission to collect samples from the far side of the moon.
Which of the following best describes the primary function of a database index?
Which of the following commands is part of the Transaction Control Language (TCL) in SQL?
In the context of a relational database, which of the following is NOT a characteristic of a candidate key ?
Which SQL query will correctly calculate the average salary of employees in each department and group them by department in a table named 'employees'?
