184.108.40.206 describe relational databases and their purpose
220.127.116.11 define data types when creating a database
18.104.22.168 use the terms attribute, object, index, record, table and tuple to describe databases
Relational database is a type of database that is structured and allows users to identify and access data which is in relation to other data.
A relational database is a collection of data with predefined relationships between them. Database data is organized as a set of tables, consisting of columns and rows. The tables store information about the entities represented in the database. Each column of the table stores a specific data type, each cell contains the value of an attribute. Each table is a collection of related values that refer to a single object or entity. Each row in a table can be labeled with a unique identifier called a primary key, and rows from multiple tables can be linked using foreign keys. This data can be accessed in many ways, without the need to reorganize the database tables.
Table stores all of the records for a particular category.
Entity is an item that is represented in a database.
Field (Attribute) this is a single piece of data such as name, date of birth or telephone number.
Record (Tuple) is all of the data or information about one person or one thing.
Index a values of key field that help database management system to find and sort records quickly.
Primary key is the unique identifier for each record in a table.
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Study Data types
1. Explain term "relational database".
2. Provide examples of database.
3. Give definitions for "table", "entity", "attribute", "record", "primary key", "index".
Ex. 1 "Terms & Definitions" (6 tasks)
Ex. 2 "Components of database"
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