Filter Multiple Collections based on Dropdown selected value

By Vinod Thachin -
One of my Project, i got a requirement to filter multiple collections and display the values in the Gallery. 
  • Collection 1 - Employee Data - ID, Name, Manager Name, Grade ID,
  • Collection 2 - ID, Manager ID
  • Collection 3 - Manager Data - ID, Manager Name, Location.

I have mapped the Dropdown with Employee ID. When User Select the Employee ID dropdown, I have Used Following Formulae and mapped it to Gallery.

Filter(
    Manager,
    ID in Filter(
        Grade,
        ID in Filter(
            EmployeeID,
            EmployeeDropdown.SelectedText.Value in ID
        ).GradeID
    ).Manager ID
)

Hope this helps.

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