Data retrieval - Introduction to the SELECT statement.

 

One of the DML commands, used for retrieving specific data from one or more tables, reporting calculated results based on the data retrieved, or displaying the results of “what if?” type calculations.

 

 

Example:

 

1.  Run the query Current Product List.

2.  Change to SQL view to see the SELECT statement

3.  Close the query.

 

 

Exercise:  Create a list of all product categories

 

1.  Type the following statement in the SQL window:

 

            SELECT *

            FROM Categories

 

2.  View the results without saving by clicking the View button (switches to Datasheet view).

 

3.  Change back to SQL view and run the statement by clicking the Run ( ! ) button.

 

4.  Save the query (e.g., AllCategories) and close it.

 

 

Exercise:  Create a phone list of customer contacts (just company and contact names with phone and FAX numbers) sorted by company name.

 

1.  Type the following statement in the SQL window:

 

            SELECT CompanyName, ContactName, Phone, Fax

            FROM Customers

            ORDER BY CompanyName

 

2.  View the results; then run and save the query as AllCustomers.  You should see 91 customers.

 

3.  Modify the list to include only customers from the United Kingdom and at the same time, change the first two column headers to Company and Customer:

 

SELECT CompanyName AS Company, ContactName AS Customer, Phone, Fax

FROM Customers

WHERE Country = “UK

ORDER BY CompanyName

 

4.  View the results; then run and save the query as UKCustomers (7 customers)

 

5.  Close the query.