IBM
A2090-614 · Question #48
A2090-614 Question #48: Real Exam Question with Answer & Explanation
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Question
The following query is executed frequently against the SALES table: SELECT sales_id, sales_date, sales_person FROM sales; If data in the SALES_ID column is unique, which statement will create an index for optimal query performance and ensure uniqueness of the SALES_ID column?
Options
- ACREATE INDEX sales_idx ON sales (sales_id, sales_date, sales_person)
- BCREATE UNIQUE INDEX sales_idx ON sales (sales_id, sales_date, sales_person)
- CCREATE INDEX sales_idx ON sales (sales_id) INCLUDE (sales_date, sales_person)
- DCREATE UNIQUE INDEX sales_idx ON sales (sales_id) INCLUDE (sales_date, sales_person)
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