Intro to Access and Data Management

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The Database Approach

Database management system (DBMS)

Minimize the following problems:

Maximize the following:

How is data organized in a DB:Data Hierarchy

Field

Record

File (or table)

Database

Is a grouping of

Is a grouping of

Is a grouping of

Data Hierarchy (continued)

Field

RecordDatabase

Table

Database Management Systems

Focus of this course: Relational database model Related Tables (Primary Keys Important) Data dictionary

How do you request data? Structured Query Language (SQL) - keywords

Query by Example (QBE) – forms/templates

Relational DB Effectiveness: Normalization

Normalization (most streamlined DB)

Steps in Creating Databases

1. Create the Tables Including a primary key

2. Create the Relationships between Tables

3. Enter data into the Tables

Create the Tables

Tables are how information are stored within the database.

When creating tables, you have to define:Field NameData Type Field Size

Create the Tables - Tips

Consider the type of data you are entering to determine what the data type and size should be.

Make sure when you setup foreign keys that they are the same type/size as the primary

Most frequently, you will be using the text for typeNumbers are typically used for fields where calculations will be usedDate/Time

Don’t forget to set a primary key

Create the Relationships

To create information in a database, you must have relationships between tables.

Tips: Close all your tables before creating relationships

Entering Data

To enter data, you need to be Datasheet View and you enter it like any other program

Once you go to the next row, the previous row is saved in the table.

Exercise #1 – Car Parts Store

Create a new DB called ServiceShop that will consist of two tables.

CarsParts

Exercise #1 – Car Parts Store

Cars Data_Type Field Size

VehicleID Text 5VehicleName Text 50Manufacturer Text 50VehicleYear Text 4VehicleType Text 20

Part Data_Type Field Size

PartID Text 5PartName Text 50VehicleID Text ?Cost ?  

Exercise #1 – Create Relationships

Create the appropriate relationships for the tables in your database.

Cars (VehicleID) -> Parts (VehicleID)

Exercise #1 – Enter Information

VehicleID VehicleName Manufacturer VehicleYear VehicleType

00001 Avalon Toyota 1999 Sedan

00002 Camry Toyota 2005 Sedan

00003 Tundra Toyota 2010 Truck

00004 Sienna Toyota 2014 Minivan

PartID PartName VehicleID Cost11111 Muffler 00004 $150.0022222 Wipers 00001 $10.0033333 Transmission 00002 $1,000.00

Project #1 – Database Creation

Remainder of class begin working on project #1. You should be able to

complete:

Table Creation Relationships Data Entry