GCSE Computer Science₈₅₂₅

Explain the concept of a database.

Explain the concept of a relational database.

• table
• record
• field
• data type
• primary key
• foreign key.

Understand that the use of a relational database facilitates the elimination of data inconsistency and data redundancy.

Note that whilst the terms entity, attribute and entity identifier are more commonly used when an abstract model of a database is being considered, the terms given here will be used for both implementations of and abstract models of databases.

• SELECT
• FROM
• WHERE
• ORDER BY…ASC | DESC

Be able to use SQL to insert data into a relational database using the commands.

INSERT INTO table_name (column1, column 2 …)
VALUES (value1, value2 …)

Be able to use SQL to edit and delete data in a database using the commands.

UPDATE table_name 
SET column1 = value1, column2 = value2 ... 
WHERE condition

DELETE FROM table_name WHERE condition