Question
Which of these ensures referential integrity?
More IT DBMS Questions
- Which of the following is used to remove all records from a table without removing the table structure?
- Which operation is NOT part of relational algebra?
- A transaction that reads a value then later sees a different value because another transaction updated and committed in between experiences which anomaly?
- A `FOREIGN KEY` constraint is used to:
- Given a relation R(A, B, C, D, E) and functional dependencies {A -> B, BC -> D, D -> E}. Which of the following is a candidate key for R?
- Which aggregate function returns the number of rows that match a specified criterion?
- Shadow paging in recovery eliminates the need for:
- Query optimization heuristics often include:
- In the context of database transactions, which isolation level allows "non-repeatable reads" but prevents "dirty reads"?
- Which of the following is not part of the process control block (PCB)?
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