Schema :
Nurse(NID,Name,Bdate,WID)
Function(FID,Fname,Description)
Ward(WID,Wname,Location)
Services(WID,FID)
Certified(NID,FID)
Queries :
1.print names of nurses not assigned to any ward.
2.print the name of the ward for which no nurse is assigned.
3.for each ward print ward name and no.of services it offers.
4.print the ward with maximum no.of nurses assigned.
5.print the names of nurses whose functions are ensured by the ward to which they are assigned.
6.list the wards that offer all services offered by ward w1.
7.print the name of the most certified nurse.
8.print pairs of nurses assigned to same ward.
9.print the name of wards that ensure each function offered by the hospital.
10.print nurse-id of nurses certified for every function the hospital offers.
11.for each ward print ward-id and nurse-id of most certified nurse.
