单选题
You work as a database administrator for Certkiller .com. As a result of performance analysis， you created an index on theprod_namecolumn of the Certkiller prodtable， which contains about ten thousand rows. Later， you updated a product name in the table. How does this change affect the index？（）
发布日期：2020-04-10
A leaf will be marked as invalid.
An update in a leaf row takes place.
The index will be updated automatically at commit.
A leaf row in the index will be deleted and inserted.
The index becomes invalid when you make any updates
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