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Oracle Tutorials - Index - Data Structure for Query Performance

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What Is an Index?

Index is an optional structure associated with a table that allow SQL statements to execute more quickly against a table. Just as the index in this manual helps you locate information faster than if there were no index, an Oracle Database index provides a faster access path to table data. You can use indexes without rewriting any queries. Your results are the same, but you see them more quickly.

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  1. What Is an Index?
  2. How To Run SQL Statements through the Web Interface?
  3. How To Create a Table Index?
  4. How To List All Indexes in Your Schema?
  5. What Is an Index Associated with a Constraint?
  6. How To Rename an Index?
  7. How To Drop an Index?
  8. Can You Drop an Index Associated with a Unique or Primary Key Constraint?
  9. What Happens to Indexes If You Drop a Table?
  10. How To Recover a Dropped Index?
  11. What Happens to the Indexes If a Table Is Recovered?
  12. How To Rebuild an Index?
  13. How To See the Table Columns Used in an Index?
  14. How To Create a Single Index for Multiple Columns?

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