week 3 lab1 review on database dina a. said [email protected]
TRANSCRIPT
Next Week (T1 & T2 only) Next Monday
Lab Quiz #2 on Databases Current Wednesday
“Week 1 Lab 2” of Problem Solving Thanks for TA Paul for Today slides
Uploading Data from Excel Got to the "External Data" tab and then select from the
Import section Excel.
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Review for Lab Quiz #2 Create a new database named Stuff.
Review for Lab Quiz #2 Create a table called Orders with the fields: OrderID,
ProductID, SalespersonName, SalesDate, Quantity and SellingPricePerPiece.
What is the primary key? Data type for ProductID? Data type for SalespersonName? Data type for SalesDate?
To Create a new Table1. Choose Tab CreateTable
2. Write click on the table name to choose the design view
3. Start writing variables Names and types Notes:
Choose the unique variable to be primary key To make a variable primary key: choose the variable, right
click primary key Primary key variable is the one with yellow key to its left If you are required to enter values for ID, make its type
number instead of autonumber
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Review for Lab Quiz #2 Create a table called Products with the fields ProductID,
PName, PurchaseDate, Supplier and PurchasePricePerPiece.
What relationships might be required?
To create a relationship 1. Choose tab Database Tools
2. Choose relationships
3. Choose both tables
4. To make a relationship between variable A and variable B
I. Drag variable A from the first table to variable B in the second table
II. A box will appear to you with the relationship variables
III. Make sure that variables names are correct and then press ok
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Review for Lab Quiz #2 Set the default quantity in the Orders table to 0. How?
1. Open the Design view of the required table
2. Choose the variable that you want to set its default value
3. Set default value in the bottom box
Review for Lab Quiz #2 Add the following records to the products table:
ProductID: 10089 , PName: Bath Salts, PurchaseDate: 10/20/2008, Supplier: Bath and Beyond, PurchasePricePerPiece: $2
ProductID: 10768 , PName: Shower Gel, PurchaseDate: 10/1/2008, Supplier: Lush, PurchasePricePerPiece: $4.50
ProductID: 10769 , PName: Shampoo, PurchaseDate: 10/1/2007, Supplier: Lush, PurchasePricePerPiece: $8
Review for Lab Quiz #2 Add the following data to the orders table:
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orders
orderID productIDsalesManName
quantity orderDatesellingPricePerPiece
1 10089 John Smith 2 11/1/2009 5
2 10769 Lora Bill 1 12/1/2009 10
3 10768 Sandra smith
10 5/1/2009 9
4 10768 John Smith 5 2/1/2009 5
Review for Lab Quiz #2 Create a query named query_1 that displays all the
information from both tables. How?
1. Choose create tab Query Wizard
2. Choose simple Query wizard
3. Choose both tables
4. Choose which fields you want to be displayed using >
5. If you want to not show a certain field after choosing it, use <
6. Rename the query as required
Review for Lab Quiz #2 Create a query named query_2, using query_1, that
displays all fields in both tables, but limit the query to the Supplier "Lush".
How?1. Creating the query using simple query wizard to select all
fields from query-1
2. Open the query in the design view
3. In the suppler field, set the criteria to “Lush”
4. You can check SQL by right-click and choose Show SQL
Review for Lab Quiz #2 Create an aggregate query named query_3. Group the
query using SalesPersonName and calculate the Average quantity he/she sells
How to create Aggregate query?1. Create the query using simple query wizard and choose only salesPersonName and quantity
2. Open the query in the design view
3. Choose Totals
4. You will find a new row added
named total and the word GroupBy is written for both fields
5. For Quantity, change the word GroupBy to be Sum so that the sum of Quantity is displayed
6. Don’t forget to check SQL
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Review for Lab Quiz #2 Create a new query query_4, that displays all
information in table products. Then, create a new field called RevenueAmount. This should be calculated by Quantity*SellingPricePerPiece.
How? Create the Query using the simple query wizard Display SQL of query_4 Add to the select statement the following:
Select …., Quantity*SellingPricePerPiece as RevenueAmount
Review for Lab Quiz #2 In query_4, create a new field called Status. This should
display "Profit" if SellingPricePerPiece>PurchasePricePerPiece, "Breakeven" if they were equal and "Loss" otherwise.
First, write the expression in English statements if SellingPricePerPiece>PurchasePricePerPiece
Status=profit
Else if SellingPricePerPiece=PurchasePricePerPiece Status=equal
Else Status=loss
How to make If statement? Go to the design view of the query Add anthoer field as:
Status:IIF(SellingPricePerPiece>PurchasePricePerPiece,
”Profit”, IIF(if SellingPricePerPiece=PurchasePricePerPiece,
“Equal”,”Loss))
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Review for Lab Quiz #2 Create a crosstab query from query_1. Let the rows show
the SalesPersonName, the columns show the product name, and calculate the sum of Quantity.
How? Choose Create Query WizardCrosstab query Choose query query1 Select SalesPersonName in rows Select ProductName in column Select quantity as data and sum as function (on the right)
Notes Take care which fields are required to be rows and which
fields are required to be columns Take care which function is required to be calculated; avg,
sum, max, etc…
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