Consider the table shown in the exhibit. Which relational algebraic operation would return Row 3?
Consider the Orders relation shown in the exhibit. Which of the following SQL statements would return all complete tuples for order dates in 2002, arranged by amount from lowest to highest?
Consider the following four database design activities:
1 - Design user views.
2 - Select a DBMS.
3 - Apply normalization.
4 - Determine entities.
Which choice shows the correct ordering of these activities, from first to last, by assigned numbers?
Which concurrency control method should be used only when conflicts between transactions rarely occur?
Consider the entity-relation (ER) diagram shown in the exhibit. When the logical database design phase is completed, which of the following is a valid DBDL description of the base relations for the ER diagram?
Which mechanism provides database users with controlled access to the database through the use of virtual tables?
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