I need the answer only in the sql you are thief

Task 2: Testing the database system

5. Create a simple interface to insert, update and delete data in the database and implement the validation methods explained in the requirements.

6. Test the system against user and system requirements and provide relevant test cases for the database you have implemented. Mention all the implemented database solution in regards to the user and system requirements, List each requirement in a table along with where it was met and how it was achieved in the implementation phase.

7. Make recommendations and suggestions for improvements in a separate conclusion/recommendations section based on the assessment.

8. Analyze the importance and effectiveness of the testing, how the test data will be meaningful through the testing process.

9. Prepare a fully functional system diagram that represents the steps of data through the system utilizing flowchart diagram.

10. Evaluate any future enhancements and recommendations for improvements to improve efficiency in system.