What consequences can arise from changing data in the database through a method in the code?

Changing data in the database through a method in the code can lead to several consequences:

• Data integrity violation: if changes do not pass validation or transactions, data can become inconsistent.
• Concurrency issues: simultaneous changes without proper synchronization can lead to conflicts and data loss.
• Performance loss: frequent or inefficient update queries can slow down the application.
• Difficulty with rollback: if the method does not support transactions, restoring the previous state will be difficult.

For example, if a method updates a record without checking the current state, it can accidentally overwrite important data.