Understanding Double Handling in Databases: Causes & Consequences

Double handling occurs when database items are updated in multiple logical sequences, causing errors and data inconsistency. Example: one department updates an employee's salary without updating their job title, creating mismatch.

It also arises when multiple systems process the same data (e.g., sales and accounting both processing an order), causing duplicates.

Prevention

• Clearly define business processes and ensure single logical update sequence.
• Implement controls against duplicate entries.