Hoi Le

Why database? Spreadsheet is not good to: Store very large information Efficiently update data Use in multi-user mode Hoi Le2

Steps to build a database (follow the ERD model) Study the system in reality Make ERD diagram Make schema Implement your database (using Access, Oracle, etc.) Hoi Le3

Every object in reality can be represented as an entity with attributes in ERD model Object  Entity Information  Attributes Relationships between Entities is one kind of information, too Primary key: an unique attribute of an entity Hoi Le4 Entity Relationship Diagram (ERD)

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Schema Hoi Le6

Rules to transfer ERD diagram => schema tables (textbook, lectures) Hoi Le7

Implement DB with Access Tools in Access: Table Form Report Query Hoi Le8

Access: Table 1 table in schema  1 table in Access Hoi Le9

10 Table in design view

Hoi Le11 Table in data view

Form Help entering data more easily Display one record at a time Hoi Le12

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Report Help to read data more easily Hoi Le14

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Query Retrieve data based on demands Hoi Le16 Query view