Databases Explained Simply
Learn how databases organise information and how SQL turns a question into a precise result. Each lesson builds one clear step in the journey from stored data to useful output.
A database stores the facts. SQL asks the question.
Topic 9 keeps the same visual teaching pattern throughout so students can focus on meaning rather than relearning the layout.
Your Topic 9 learning journey
Begin with the structure of a database, then build SQL one command at a time.
Database Structure
Understand tables, fields, records and why a primary key must uniquely identify each record.
Open lesson →SQL
Meet the language used to ask a database questions and return useful information.
Open lesson →SELECT and FROM
Choose which fields to display and identify the table that contains the data.
Open lesson →SELECT, FROM and WHERE
Add a condition so the query returns only records that match the requirement.
Open lesson →ORDER BY
Sort query results into a useful order, with ascending order used by default.
Open lesson →SUM
Add all numerical values in a selected field and return one calculated total.
Open lesson →COUNT
Count how many records match the query and return one clear numerical answer.
Open lesson →