CST-133 DataBase Labs Access DataBase Labs -- Muggwump Fish Farm Click your left mouse button to...

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Access DataBase Labs-- Muggwump Fish Farm

Click your left mouse button to proceed . . .

© Delta College CST Faculty

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The Muggwump Fish Farm DataBaseneeds to keep track of . . .

• Fish they sell– Fish Master

Muggwump

DataBase

• Customers they sell to– Customer Master

• Orders for Fish from Customers– Orders Data File


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s Data Structures

• Each DataBase File has a name– E.G. Fish Master

• Each DataBase File is controlled by a Key– E.G. M Fish No

• Each Record is made up of Fields– E.G. Fish Description

• All names must be spelled exactly as shown– Capital letters where shown– Spaces where shown


Orders Fish Customer

Vendors Employee

Boats

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I needcustomer

number 40

The Key

• Uniquely identifies each record of a database– Cannot be duplicated– Keeps records in sequence

• Can be used to “find” a given record• It’s the “Key” to accessing a record

Muggwump

DataBase


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s Fish Master

• Key: M Fish No– 4 Characters– E.G. CR1– E.G. XY1

• Other Fields:– Fish Description Quan On Hand Memo– Cost Price Wt at Maturity– Salt or Fresh Picture


You can find me here!

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s Customer Master

• Other Fields:– C First Name City Balance– C Last Name State Credit Limit– Street Zip Memo


• Key: C Cust No– 4 Characters– E.G. 20– E.G. 30

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– Ship Date– Quan Pur

– O Cust No

Orders Data File:

• Key: Order No– 4 Characters– E.G. F14– E.G. F15


What Fish was ordered?

by this Customer?How many?When?

• Other Fields:– O Fish No

3 Carp7/04

Muggwump

J. Doe

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s Orders Data File

• Then we can get more info about:– The Fish

• From the Fish Master (e.g. Fish Description)

– The Customer• From the Customer Master (e.g. Customer Name)


• The Order can lead us to information about:– The Fish

• Using O Fish No

– The Customer• Using O Cust No

3 Carp7/04

Muggwump

J. Doe

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s Click your left mouse button to proceed . . .

Relational DataBase -- Tables

• We start with three tables already defined1 Fish Master2 Customer Master3 Orders

• We will add records to these tables• We will change records in these tables• We will ask questions -- queries• We will create reports

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Query a DataBase Management System

• Ask a question of the DBMS

• The DBMS returns information

Carp?

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QBE -- Query By Example• Suppose we want the First and Last Name

of a Customer and their City.

• Select the table that stores that information.

a) The Table is Customer Master

b) The First Name Field is C First Name

c) The Last Name Field is C Last Name

d) The City Field is City

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Query: First & Last Names and City

1. Construct the Query --- Choose the Table: Customer Master

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2. The Fields of the Customer Master are listeda) Select C First Nameb) Select C Last Namec) Select City

Get a Check Mark in the Show Box

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3. Run the Query Click the Exclamation Point Button Results are in Answer Window

!

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Query: First & Last Names and City: City is Hollywood

4. Can Supply Criteria Click in Criteria Cell – Key your Criteria Click the Exclamation Point Button New Results are in Answer Window

We asked for anyone living in Hollywood so we got Whoopi’s data

!

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Criteria

• Key data you want to match– e.g. a specific City (Hollywood)– e.g. a specific fish Description (Carp)– e.g. a specific C First Name (Whoopi)– e.g. >500 (Credit Limit Greater Than 500) – e.g. <21 (Quan Pur Less Than 21)– e.g. a specific Zip code (48710)

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s A Problem:

Muggwump

Fish Farm

is out of

Carp!

. . . We need to inform our customers!


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We Know Fish Description -- We Need Customer Name and Address

We know the Fish Description:

Carp

Leads to Fish Number in Fish Master:

M Fish No

Leads to orders for this fish in Orders:

O Fish No

Orders has Customer Number:

O Cust No

Customer Master has Customer Name and

Address

Leads to Customer in Customer Master:

C Cust No

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!

Find the Fish Number for “Carp” . . .

1. We know the Fish Description -- we need the Fish Number

3. Supply the Fish Description: Carp


2. For the query, select the fields for Fish Number and Description

5. Query results are in the new window - - -

The Fish Number for “Carp” is “CR1”

Query theFish Master

4. Click the Run Query Icon -- the Exclamation Point! !

Carp

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Find the order(s) for“CR1”(Carp) . . .

1. We know the Fish Number -- we need the orders for CR1

3. Supply the Fish Number: CR1


2. Query: Select Order #, Fish #, and Customer #


There is one order with the Order Number “F14” and the Customer Number “20”

Query theOrders File

!


CR1

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Query theCustomer Master

FindCustomer“20” . . .

1. We know the Customer # -- we need the Name & Address for “20”

3. Supply the Customer Number: 20


2. Query: Select Customer #, First & Last Name, Address


Customer #20 is Whoopi Goldberg who lives in Hollywood on Nun Such St.

!


FindCustomer“20” . . .

Query theCustomer Master

20

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“Carp” led us to “Whoopi Goldberg". . . We Did Three Queries

Query #1.The Fish Master gave us the Fish Number for “Carp”


Query #2.The Order File gave us the Customer Number for that Fish Number

Query #3.The Customer Master gave us the Name and Address for that Customer Number

We Did Three QueriesWhy not do one Query -- and let the DBMS do more of the work for us !

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Tables can be joined . . .


CustomerMaster

Orders

Cu

stom

er #

Use fields containing same data in each

table (Fish Number)

-- get GUI joining line

Use fields containing same data in each

table (Customer Number)

-- get GUI joining line

FishMaster F

ish

#

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Who ordered “Carp” ?


Query allThree Tables

1. Start building the Query using the Fish Master Table

3. Select the desired fields & key Fish Description as “Carp”

2. In The Show Table Window, Add the Orders and CustomerMaster tables

Carp

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Carp

6. Observe the GUI Connector Lines

5. Join Orders File and the Customer Master – drag C Cust No to O Cust No

4. Join the Fish Master and the Orders File – drag M Fish No to O Fish No

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Carp

9. “Carp” led us to Whoopi Goldberg with one query

8. Query results are in the new window --- from all three tables --- they were joined

!

7. Click the Run Query icon

!

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Exit from PowerPoint Viewer and start your DataBase Labs after this slide . . .

Click your left mouse button to return to the PowerPoint Viewer . . .

CustomerMaster

Orders

Cu

stom

er #

FishMaster

Boat FL

Fis

h #

Boat #

Then you will design and create a new table

to keep track of the boats that Muggwump Fish Farm uses to fill

orders

You will modify existing tables and be

led through some queries and reports

and create some charts

© Delta College CST Faculty

CST-133 DataBase Labs Access DataBase Labs -- Muggwump Fish Farm Click your left mouse button to...

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