what is relational database

1Relational Database Management System
2(RDBMS) means that tables in
3database are related using
4primary/foreign key relationship. Used to store,
5modify and retrieve data in the database.
6
7• How are they related?
8Primary Key (unique and not NULL)
9Foreign Key (duplicate and NULL)
10
11• What type of database system you have expertise with?
12RDBMS, such as SQL and Oracle
13• Entity Relation Model (ERM):
14An entity can be a real-world object, that can
15be easily identifiable: student, class, teacher.
16• Attributes:
17Things that describe the Entity. (student name, age, birthday…)

1Relational Database =
2-Tables are structured related to each other
3-Each specific type of domain data is strored
4 it's own table
5
6Non-Relational Database =
7-There is no relation at all between tables
8-Mostly key+value pair : like jSon

1
2Non-Relational Database =
3-There is no relation at all between tables
4-Mostly key+value pair : like jSon

1Non-Relational Database =
2-There is no relation at all between tables
3-Mostly key+value pair : like jSon

1Relational and non-relational database