The document discusses database management systems and relational database concepts including: 1) It introduces DBMS command tools and slides that describe the DBMS and relational data model. 2) It explains key concepts in relational databases like tables, rows, columns, primary keys, foreign keys, and relationships between tables. 3) Examples of database tables are shown to illustrate these concepts like the Department and Employee tables with primary and foreign keys.

1. DATABASE MANAGEMENT
SYSTEM
LECTURE 2
DBMS02

2. DBMS
Slide 2

3. Slide 2

4. Slide 2

5. DBMS
Command
Tools
-
-
-
-
Slide 2

6. 1.
2.
3.
4.
5.
6.
7.
8.
Slide 2

7. DATA MODEL
-
-
-
Slide 2

8. (Relational
Database Model)
-
Slide 2

9. (Relational
Database Model) Table
Relation
Row
(Column)
Dept_ Dept_nam Location
no e
Department Administrati
1 Sathorn
row
on
2 Shipping Silom
3 Sales Silom
4 Marketing Bangpo
5 Accounting Sathorn
Slide 2 column

10. Table
1.
2.
3.
(
)
Slide 2

11. Department
Department
Slide 2

12. 
Table Department
Location
Silom
=>>
2 Shippin Silom
g
3 Sales Silom
2 Location
Silom
Dept_name Sales
=>>
3 Sales Silom
Slide 2

13. 3
Location Silom
Dept_no 3
Dept_name
=>> Sales
3 Sales Silom
4
Dept_name Sales
=>>
3 Sales Silom
Slide 2

14. Dept_no 3
=>>
3 Sales Silom
–

15. NOTE
Slide 2

16. - Key -
-
Identify
-
-
NOTE
-
Unique
- Null
Slide 2

17. Invoice
No Inv_No Amout Prod_id
1 221 230 A1
2 221 450 B4
3 221 450 D1
1 224 125 B1
2 224 300 A2
1 225 300 B1
2 225 300 A1

18. Candidate Key
Identify
Candidate Key
Candidate Key
Primary Key
Candidate Key
Candidate Key
Primary Key
Candidate Key
Slide 2 Alternate Key

19. Primary Key / PK
Null)
PK
Slide 2

20. >> Column
Slide 2

21. NOTE
Slide 2

22. Secondary Key
Single
or Composite Key
Foreign Key
Slide 2

23. Department
Dept Dept_na Loca
_no me tion
1 Administra Satho Pimon
tion rn
2 Shipping Silom
3 Sales Silom
4 MarketingBang
Employee po Karoon
5ID Accounting Satho
Name Positio Salary MGR_ID Dept_no
rn n
111 Satit MD 95000 1
112 Ladda Manage 58000 111 1
r
212 Pimon Manage 47000 111 2
r
312 Tida Manage 25000 111 3
r
313 Sansiri Clerk 12500 112 1

24. Slide 2