2. Unit 1 MS Access
DataBase - What is a database? A database is a tool for collecting and organizing
information. Databases can store information about people, products, orders, or anything
else. Many databases start as a list in a word-processing program or spreadsheet.
Entity Relationship (ER) – This is the tool for analyzing semantic features.
- Conceptual Modeling
- Logical Modeling
- Physical Modeling
3. Entity
Entity is a person, a place , an object, an event or a concept in a user’s environment
Entity type
Collection of entity that share common attribute.
Entity Instance
EI is a single occurrence of an entity type
Attribute
Type of entity each entity has an attribute
Simple and Composite Attributes
Simple attribute is a characteristic that cannot be broken down into small components
Single-Valued and Multivalued Attribute
Each of attribute of an entity has only one value for a given instance
4. Relationships
One or more entity type that is of interest to the organization
Keys
The key is an attribute that identifies one entity instance from all others in the entity.
Primary Key
Identifier attribute
Foreign Key
Foreign keys supply as reference a related table through the primary key of that related table
Relational Database
Collection of Tables
5. Visual Basic (VB)
We Learned about Visual Basic and Study its purpose and uses. What is Visual Basic. In simple
word its an app that help
Us build a Website, Game, Page, and etc.
How to use it?
In VB we use codes and you can freely customize your project.
But VB has its limitation. It may be easy to use but you can’t expect VB to give you a great
outcome when creating
Large projects. But when you are still learning like me VB is perfect for you this is easy to use and
you will learn easily.
VB was one of the first programming languages to incorporate more everyday words
into the syntax so the language could be easier to learn and remember. This is a big
reason why Microsoft wanted to release a programming language that stemmed from
BASIC.
