HPR0014: Databases 101 Part 2

RDBMS - Relational Database Management System

Relational Model: when there are relationships between items of data such as products, customers and orders

A database contains two-dimensional tables which are similar in concept to spreadsheets. Each table contains columns and rows like a spreadsheet, but these are called fields and records in database terminology

Data is stored in tables but is broken down into the most efficient form such that there is no duplication. This process is called normalisation.

Fields have data types associated with them, such as numeric fields for storing numbers or text fields for storing text.

Tables have keys to simplify searching. Primary keys are used to make records in a table unique.

Shownotes by: Dave Morriss, 2015-08-14

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