Step by step exercise. Update queries


Objective.

 

Practice the procedures for creating Update queries.

 

Exercise 1.

 

After analizing the results of the previous courses the company has decided to increase the hours of all the courses by ten percent.

1 Open the Classes.mdb database.

2 Position yourself in the Queries tab of the Database window.

3 Click on the Create query in Design view option.

4 Click on the Courses table.

5 Click on the Add button.

6 Click on the Close button to close the dialogue box.

We will now add the fields that we need (those that we to update and those that we need to add in the search criteria, in our exercise we want to update all the courses and so we will not put a search criteria), we will only add Hours.

7 Double click on the Hours field.

8 Drop down the button on the toolbar and select the Update query option.

9 In the Update to: row Type [Hours]*1.1 or if you prefer [Hours] + ([Hours]*10/100).

10 Click on the button to update.

11 Close the query, name it Increase by 10 percent.

 

Exercise 2.

 

Now the Computers course need to be increased by 2 hours.

A condition needs to be added so that only these courses are updated.

1 Open the Classes.mdb database.

2 Position yourself in the Queries tab of the Database window if you are not already there.

3 Click on the Create query in Design view option.

4 Click on the Courses table.

5 Click on the Add button.

6 Click on the Close button to close the dialogue box.

7 Double click on the Hours field which is the field we want to update.

8 Double click on the Course name field which is the field we are going to use in the search criteria.

9 Type Computers in the Criteria: row of this column so that only these courses are updated.

10 Drop down the button on the toolbar and select the Update query option.

11 In the Update to: row type [Hours] + 2 .

12 Click on the button to update.

13 Close the query, name it Update Computers courses.

 



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