最新的IBM DB2 10.5 DBA for LUW Upgrade from DB2 10.1 - C2090-311免費考試真題

A. ANY

B. 1

C. -1

D. ON

A. Storage requirements for NOT ENFORCED unique constraints are identical to storage requirements for a unique index.

B. The query optimizer will consider a NOT ENFORCED unique constraint when selecting the optimal data access plan.

C. When attempting to insert data that does not conform to the NOT ENFORCED unique constraint, an error will be returned and the record will not be inserted.

D. NOT ENFORCED unique constraints enforce uniqueness only for primary key columns.

A. After all rows in an extent where updates took place have been deleted.

B. After all rows in an extent have been updated.

C. Whenever an individual row is updated.

D. Whenever an individual row is deleted.