Examlex
Fully equivalent means that the optimized query results are always the same as the original query.
Q3: A _ is any key that uniquely
Q17: Most current-generation relational DBMSs perform automatic query
Q18: Which of the following is a specialization
Q21: Each table in a relational database must
Q28: A(n) _'s main function is to help
Q29: A(n) _ process is based on repetition
Q31: A DBA determines the initial size of
Q38: _ transparency allows a transaction to update
Q56: Describe the three basic characteristics of Big
Q68: The concept of relationship strength is based