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Oracle Tutorials - Index - Data Structure for Query Performance
(Continued from previous topic...)
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.
(Continued on next topic...)
- What Is an Index?
- How To Run SQL Statements through the Web Interface?
- How To Create a Table Index?
- How To List All Indexes in Your Schema?
- What Is an Index Associated with a Constraint?
- How To Rename an Index?
- How To Drop an Index?
- Can You Drop an Index Associated with a Unique or Primary Key Constraint?
- What Happens to Indexes If You Drop a Table?
- How To Recover a Dropped Index?
- What Happens to the Indexes If a Table Is Recovered?
- How To Rebuild an Index?
- How To See the Table Columns Used in an Index?
- How To Create a Single Index for Multiple Columns?