Oracle
1Z0-061 · Question #322
1Z0-061 Question #322: Real Exam Question with Answer & Explanation
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Question
You have created an index with this statement: create index ename_i on employees(last_name,first_name); How can you adjust the index to include the employees' birthdays, which is a date type column called DOB? (Choose the best answer.)
Options
- AUse ALTER INDEX ENAME_I ADD COLUMN DOB;.
- BYou can't do this because of the data type mismatch.
- CYou must drop the index and re-create it.
- DThis can only be done if the column DOB is NULL in all existing rows.
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