1. Work-in dept DID emp salarynames manage names EID Can be Pkey Solution for the Quiz –Problem 1

2. carries dept DID item description ID quantity supply supplier names priceaddress names SID

3. Order-detail order id item description ID quantity date Ship addr Each manager’s salary is higher than all other employees in the dept he/she manages Each item must be at least supplied by three suppliers name Can be empty ?

4. Multiplicity Comes from UML. Some ER or EER apply this notation. –One constraint which is specified in the form (min,max) to specify the limit on participation. –Each item must be supplied from at least three suppliers ---(3,*) the total participation => (1,*) The partial participation=>(0,*) Key constraint=>(0,1) Can we combine the above to express (3,*)?