Ask for help in the relations between the table

[ibrahim horus]

My brothers of the best forum I've set work schedules in accordance with the attached image with the file, please

- To assist in the work of relations such as what is in the attached image

- Tables are correct as it is in the picture.

- There's Data_Items_in_tests table in front of each of test_id field and test_data_item_id PF mark what is the brand.

- Please clarify the relationship between the tables Test_definitions, Data_Items_in_tests, Test_Data_Items, Test_Results because I did not understand what is the PF who in Data_Items_in_tests table

Please my brothers Add suggestions to correct relations and tabulator

 

[BlueIshDan]

Was this put through google translate :S

 

[ibrahim horus]

where help