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Relational Databases - Lecture 3 - Logical and physical models (UML)
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Relational Databases - Lecture 3 - Logical and physical models (UML)
1.
1 0 0 1 0 1 0 0 1 0 1 0 1 0 0 1 0 0 1 1 0 0 1 0 1 0 1 1 0 1 1 0 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 1 1 0 1 ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✑ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ ✑ ✐ ✐ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✑ ✑ ✑ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 0 1 0 0 1 ✑ 1 0 0 1 0 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 0 1 1 1 0 1 1 0 0 1 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 0 1 1 1 1 1 1 0 0 0 1 0 1 0 0 1 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 0 0 1 0 1 1 1 1 1 ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✑ Logical and physical
models UML notation
2.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Logical model • Represents •
Entities • Relationships and cardinalities • Attributes • Primary keys • Foreign keys StudentID (PK) Name Surname Nationality UniversityName (FK) STUDENT UniversityName (PK) Country Address UNIVERSITY 1-1 1-N
3.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Logical model Student UniversityAttends Name Surname Nationality Name
Address Country StudentID StudentID (PK) Name Surname Nationality UniversityName (FK) STUDENT UniversityName (PK) Country Address UNIVERSITY 1-1 1-N
4.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Week entity BuildingIDHeight Building containscontains Color
NumFloors Apartment Number Floor Size Number (PK) BuildingID (PK) (FK) Size Floor APARTMENT BuildingID (PK) Color Height NumFloors BUILDING 1-1 1-N
5.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Many-to-many Student Class Completion StudentID ClassID containsachieves
containscontains GradeSemester StudentID (PK) STUDENT ClassID (PK) CLASS 1-1 0-N StudentID (PK) ClassID (PK) (FK) Semester (PK) (FK) Grage COMPLETION 1-1 1-N
6.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Self-relationship University Name Address Country Branch UniversityName (PK) Country Address Branch of
(FK) UNIVERSITY Branch UniversityName (PK) Country Address UNIVERSITY BranchName (PK) UniversityName (FK) UNIVERSITY BRANCH
7.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Data integrity • Primary
key is always unique • A primary key cannot be deleted if there is still a foreign key that refers to this primary key. • Student or class tuple cannot be deleted if a tuple in COMPLETION table referring to them exists StudentID (PK) STUDENT ClassID (PK) CLASS 1-1 0-N StudentID (PK) ClassID (PK) (FK) Semester (PK) (FK) Grage COMPLETION 1-1 1-N
8.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Relational schema • STUDENT
(studentID, name, surname, nationality, universityName) (N,1) • UNIVERSITY (universityName, country, address) StudentID (PK) Name Surname Nationality UniversityName (FK) STUDENT UniversityName (PK) Country Address UNIVERSITY 1-1 1-N
9.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Physical model • Represents •
Relationships • Primary keys • Foreign keys • Table names • Column names • Column constraints • Column data types STD_ID: INTEGER UNV_NAME: VARCHAR (50) STD_NAME: VARCHAR (30) STD_SURNAME: VARCHAR (30) STD_NAT: VARCHAR (20) STUDENT UNIVERSITY UNV_NAME: VARCHAR (50) UNV_COUNTRY: VARCHAR (20) UNV_ADDRESS: VARCHAR (90)
10.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Self-relationship University Name Address Country Branch BRANCHUNIVERSITY UNV_NAME: VARCHAR (50) UNV_COUNTRY:
VARCHAR (20) UNV_ADDRESS: VARCHAR (90) UNV_SATELLITE: VARCHAR (50) UNV_HOME: VARCHAR (50)
11.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Data types/domain • VARCHAR
(30) • BOOLEAN • INTEGER • DECIMAL(2,3) • FLOAT • DATE • TIME • TIMESTAMP • etc.
12.
1 0 1 0 0 1 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 1 1 1 0 0 1 0 1 0 0 1 1 0 0 1 1 1 0 0 0 1 0 1 1 ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 1 1 0 0 1 ✑ ✑ 1 ✑ ✑ 1 0 1 Summary Conceptual Logical Physical Entity
Names ✓ ✓ Relationships ✓ ✓ ✓ Attributes ✓ ✓ Primary keys ✓ ✓ Foreign keys ✓ ✓ Table names ✓ Column names ✓ Data types ✓
13.
1 0 0 1 0 1 0 0 1 0 1 0 1 0 0 1 0 0 1 1 0 0 1 0 1 0 1 1 0 1 1 0 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 0 1 0 1 0 0 1 0 1 ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✑ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ ✑ ✐ ✐ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✑ ✑ ✐ ✑ ✐ ✑ ✐ ✐ ✑ ✐ ✐ ✑ ✐ ✑ ✑ 0 1 0 0 1 ✑ 0 0 1 0 0 1 0 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 1 0 0 1 1 1 0 1 1 0 0 1 0 1 0 0 1 0 1 1 1 1 0 1 1 0 0 1 0 1 1 1 1 1 1 0 0 0 1 0 1 0 0 1 1 1 1 0 0 1 0 1 0 0 1 0 1 0 0 1 1 0 1 0 1 0 0 1 0 1 1 1 1 1 ✑ ✐ ✐ ✑ ✑ Logical and physical
models