Answer:
Check the explanation
Explanation:
Kindly check the attached images below to see the step by step explanation to the question above.
Answer:
Explanation:
A relational database is designed to enforce the uniqueness of primary keys by allowing only one row with a given primary key value in a table. A foreign key is a column or a set of columns in a table whose values correspond to the values of the primary key in another table.
Answer:
Option D is correct.
Explanation:
Cassandra labeling information with such a gravestone indicates should restart transmitting an erase request to such a duplicate that had been down earlier of deletion.
Cassandra may not instantly delete information labeled for removal from disc the removal of identified information takes place throughout compaction a deleted section may reappear when a maintenance is never regularly carried out.