IBM
C2090-312 · Question #21
C2090-312 Question #21: Real Exam Question with Answer & Explanation
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Question
When defining a foreign key on a table, which statement is true?
Options
- AIt is not mandatory to have an index on the foreign key columns but it can help to avoid locking
- BThere is no need to define an index on the foreign key columns as DB2 cannot use an index for
- CIt is not mandatory to have an index on the foreign key columns but it can help performance when
- DYou must define an index on the foreign key columns where the index columns are the same as
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