Your database administrator has disallowed a group of users from making alterations to the Employees table in your corporate database. The users, known asGroup_2, previously had full privileges with the Employees table. Which of the following SQL statements properly removes any alteration privileges from Group_2?
Which type of dependency occurs when one attribute of a composite key is removed and the dependency still exists?
Consider the relations shown in the exhibit. Which of the following SQL statements would enter data from the Customers relation into the Atlanta_Customers relation?
Which concurrency control method should be used only when conflicts between transactions rarely occur?
Which mechanism provides database users with controlled access to the database through the use of virtual tables?
Consider the relational database shown in the exhibit.What is the foreign key in this database?
