How can you use cursors in PL/SQL to fetch and process data from a database table?

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Using Cursors in PL/SQL to Fetch and Process Data from a Database Table

When working with PL/SQL, cursors are a powerful tool for fetching and processing data from a database table. Cursors provide a way to work with individual rows of data returned by a query, allowing for more granular control over data manipulation.

One way to use cursors in PL/SQL is by declaring a cursor that selects the desired data from a specific table. The cursor can then be opened, fetched row by row, and processed until all the relevant data has been retrieved.

By using a cursor in PL/SQL, you can iterate through the result set and perform operations on each row, such as updating values, calculating aggregate functions, or performing validations. This can be particularly useful when dealing with complex data manipulation tasks that require row-level processing.

Remember to close the cursor once you are done processing the data to free up resources and ensure efficient memory management.

Overall, by using cursors in PL/SQL, you can effectively fetch and process data from a database table with precision and control.