What are string locks and why are they needed?

Row locks are a mechanism for managing concurrent access to individual records in a database. They are necessary to prevent conflicts and maintain data integrity when multiple transactions operate simultaneously.

For example, if one transaction modifies or deletes a row, locking that row will prevent another transaction from modifying or deleting it at the same time, until the first transaction is completed.

This increases the reliability and consistency of data, allowing efficient handling of parallel queries without data loss or errors.