AFFECTED ROWS

Description: The ‘affected rows’ in database management systems refer to the number of records in a table that have been modified as a result of the last executed statement. This concept is fundamental for understanding the impact of data modification operations such as INSERT, UPDATE, and DELETE. When executing a query, the database management system returns the number of affected rows, allowing developers and database administrators to assess the effectiveness of their commands. For example, if an UPDATE is performed to change the status of a record, the number of affected rows will indicate how many records have been updated. This feedback is crucial for data management, as it helps identify whether an operation has been executed correctly and if it has had the desired effect. Additionally, affected rows are useful for debugging and monitoring query performance, allowing for the optimization of database operations.

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