Which statement describes the effect on an index, when the indexed column for the rows is updatedin the base table()
- A、An update in a leaf row takes place.
- B、The index becomes invalid after the update.
- C、The leaf block containing the row to be updated is marked as invalid.
- D、A row in the leaf block of the index for the key value is logically deleted and a new leaf row is inserted
正确答案:D
答案解析:有
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