An index in Oracle is a database object that provides a quick way to look up rows in a table based on the values in specific columns. Here's a step-by-step explanation:

1. An index is created on one or more columns of a table. For example, if you have a table of customers, you might create an index on the "last name" column to quickly find all customers with a specific last name.

2. When an index is created, Oracle reads the specified columns and forms a sorted list of the values. This list is stored separately from the table itself.

3. Each entry in the index also includes a pointer to the row in the table that contains the indexed value. This is how the index provides a "shortcut" to finding specific rows.

4. When a query is executed that searches for a

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An index in Oracle is a database object that provides a quick way to look up rows in a table based on the values in specific columns. Here's a step-by-step explanation:

1. An index is created on one or more columns of a table. For example, if you have a table of customers, you might create an index on the "last name" column to quickly find all customers with a specific last name.

2. When an index is created, Oracle reads the specified columns and forms a sorted list of the values. This list is stored separately from the table itself.

3. Each entry in the index also includes a pointer to the row in the table that contains the indexed value. This is how the index provides a "shortcut" to finding specific rows.

4. When a query is executed that searches for a

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An index in Oracle is a database object that provides a quick way to look up rows in a table based on the values in specific columns. Here's a step-by-step explanation:

1. An index is created on one or more columns of a table. For example, if you have a table of customers, you might create an index on the "last name" column to quickly find all customers with a specific last name.

2. When an index is created, Oracle reads the specified columns and forms a sorted list of the values. This list is stored separately from the table itself.

3. Each entry in the index also includes a pointer to the row in the table that contains the indexed value. This is how the index provides a "shortcut" to finding specific rows.

4. When a query is executed that searches for a

index is an entry points to a single ,row. in oracle

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