Microsoft Access 2002

By Ian Cole

Lecturer in ICT

Access Overview

Database Theory: Creating a Database:

Designing and creating a relational database.

Familiarisation with the Access screen. Opening,viewing and creating tables. Imputting Data. Sorting and filtering tables. Creating reports.

Session Plan Introduction. Relational Theory.

Normalisation. Microsoft Access.

Tables Forms Queries

Self – Directed Workbook

Introduction What is a Database?

Telephone Book. Patient Records A Timetable. Student Records Systems.

Different types of Database! hierarchical database (1960 &

1970’s) relational databases (Access)

Relational Theory

Hello there! My names Sid

Hi call me Pid

Would you like to have

relations

Mmmm!!Yes

please

Relational Theory

Hello Son

Mummy!

Daddy!

My baby!!!

Relational Theory

Is Excel a Relational Database?

Database Normalisation

Codd's Law a set of 13 rules

used to determine if a database can be considered a Relational Database.

It’s all my

fault

Database Normalisation Normalisation is to reduce data redundancy and the

chances of data becoming inconsistent. A table in a relational database is said to be in normal

form if it satisfies certain constraints - Codd's original work defined three forms but there are now five generally accepted steps of normalisation.

First Normal Form eliminates repeating groups by putting each into a separate table and connecting them with a one-to-many relationship (1NF).

Second Normal Form eliminates functional dependencies on a partial key by putting the fields in a separate table from those that are dependent on the whole key (2NF).

Third Normal Form eliminates functional dependencies on non-key fields by putting them in a separate table. At this stage, all non-key fields are dependent on the key, the whole key and nothing but the key.

Fourth Normal Form separates independent multi-valued facts stored in one table into separate tables.

Fifth Normal Form breaks out data redundancy that is not covered by any of the previous normal forms.

Database Normalisation Cole’s Law

Don’t duplicate data in a database or it won’t work properly.

Structured Query Language

SELECT "column_name" FROM "table_name“

WHERE "condition"

Never mind SQL

I keep thinking BLOODY HELL!!!!!

Structured Query Language

SELECT "column_name" FROM "table_name“

WHERE "condition"

Example:SELECT RedFROM P tableWHERE city = ‘London’

Microsoft Access

Tables Different views Records Fields

Columns Primary Key

Microsoft Access

Tables Different views Records Fields

Columns

Forms

Microsoft Access

Tables Different views Records Fields

Columns Forms Sorting – temporary Queries – Permanent (new table)

Microsoft Access

Database Window Always open

Toolbars Contextual No need to save

Workbook Ask questions at any time