1D0-541 Exam Dumps : CIW v5 Database Design Specialist

It is the primary key for an entity.

It uniquely identifies every instance of an entity.

One or more keys are joined together to form a composite key.

One or more keys may be used to form a primary key.

BUILDING(Building_ID, Bldg_Name, Location, Room_Count)

Primary Key Building_ID RESIDENT(R_ID, Room_Num,

Res_Name, Building_ID) Primary Key R_ID

BUILDING(Building_ID, Bldg_Name, Location, Room_Count)

Primary Key BUILDING RESIDENT(R_ID, Room_Num,

Res_Name, Building_ID) Primary Key RESIDENT

BUILDING(Building_ID, Bldg_Name, Location, Room_Count) Primary Key BUILDING ForeignKey BUILDING(Building_ID) references RESIDENT(Building_ID) RESIDENT(R_ID, Room_Num, Res_Name, Building_ID) Primary Key RESIDENT

BUILDING(Building_ID, Bldg_Name, Location, Room_Count)

Primary Key Building_ID RESIDENT(R_ID, Room_Num,

Res_Name, Building_ID) Primary Key R_ID Foreign Key

Building_ID references BUILDING(Building_ID)

Repetition of data, application program flexibility, and data centralization

Incompatibility of files, tabular data structures, and data dependence

Separation of data, repetition of data, and data independence

Application program inflexibility, data dependence, and separation of data