The index in a database works in the same way an index would work in a book. It's a way for the DB to retrieve data faster.
In Oracle you can make your own indexes for columns you use a lot, but some are made automatically for columns with Primary Key constraints or Unique constraints.
When you do things right, people won't be sure you've done anything at all.
anish jain
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Janeice DelVecchio wrote:The index in a database works in the same way an index would work in a book. It's a way for the DB to retrieve data faster.
In Oracle you can make your own indexes for columns you use a lot, but some are made automatically for columns with Primary Key constraints or Unique constraints.
Can you please elaborate? I want to know how does that work when someone fires a select query?
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