# UPDATE

Short Description

The SQL statement is performing an UPDATE of existing data within the database

## Detailed Description

One of the four SQL language Data Manipulation Language (DML) statements - `SELECT`, `INSERT`, `UPDATE` and `DELETE`.

## Further Reading

* [Oracle Magazine - How to read an execution plan](https://blogs.oracle.com/oraclemagazine/how-to-read-an-execution-plan)
* [Oracle Tuning Guide - Explaining and Displaying Execution Plans](https://docs.oracle.com/en/database/oracle/oracle-database/21/tgsql/generating-and-displaying-execution-plans.html#GUID-60E30B1C-342B-4D71-B154-C26623D6A3B1)
* [Oracle Tuning Guide - Comparing Execution Plans Tutorial](https://docs.oracle.com/en/database/oracle/oracle-database/21/tgsql/generating-and-displaying-execution-plans.html#GUID-60FF7945-DFA3-4E97-89D0-B4F11543C680)

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