Article ID: 292299
Article Last Modified on 8/19/2004
APPLIES TO
- Microsoft Access 2002 Standard Edition
This article was previously published under Q292299
Novice: Requires knowledge of the user interface on single-user computers.
This article applies to a Microsoft Access database (.mdb) and to a Microsoft Access project (.adp).
For a Microsoft Access 97 version of this article, see 101675.
For a Microsoft Access 2000 version of this article, see 209493.
SUMMARY
This article describes a table design that you can use for an application that tallies results from questionnaires and surveys.
MORE INFORMATION
The following examples outline nonrelational table design commonly used for questionnaires and surveys, and suggests an improved, relational table design.
Nonrelational Table Design
When designing tables for questionnaire applications, many users begin with a design that resembles the following table. Each record contains multiple fields, called Question1 through Question<n>, that contain responses to the questions.
Table: Table1 (old) -------------------------------------- FieldName: RespondentID [Primary Key] FieldName: Question1 FieldName: Question2 FieldName: Question3 . . . FieldName: Question<n>
Problems occur when you want to perform crosstab queries to summarize or graph the questionnaire results (or both).
Relational Table Design
A relational table design better supports summary queries, reports, and graphs. In the following table, the Question ID field identifies the question and the Response field contains the answer.
Table: Table2 (new) ---------------------------------- Field: RespondentID [Primary Key] Field: QuestionID [Primary Key] Field: Response
How to Switch to Relational Database Design
Steps Using an Access Database.
Create the following table:
Table: Table2 ---------------------------- Column Name: RespondentID Datatype: Integer Column Name: QuestionID Datatype: text Column Name: Response Datatype: yes/no Table Properties: Table2 ------------------------------------ PrimaryKey: RespondentID, QuestionID
- Create a new query that is based on Table1.
On the Query menu, click Append Query. Select Table2 as the table to which you want to append the data. Design the query as follows:
Query: Query1 ----------------------- Field: RespondentID Append To: RespondentID Field: Question1 Append To: Response Field: "Question1" Append To: QuestionID
- Run Query1 to append to Table2 each participant's responses to Question1.
Repeat steps 2 through 4, replacing Question1 with Question2, and "Question1" with "Question2". Modify and run this query for each question in Table1. After running all the append queries, the result is a table (Table2) that can easily summarize your results in a totals query:
Query: qryResults ---------------------------------------------------- Field: QuestionID Table: Table2 Total: Group By Field: Ayes: Abs(Sum([Response]=Yes}} Total: Expression Field: Noes: Count([Response]) + Sum([Response]=Yes) Total: Expression
Steps Using an Access Project.
Create the following table:
Table: Table2 ------------------------- Column Name: RespondentID Datatype: int Column Name: QuestionID Datatype: nvarchar Column Name: Response Datatype: bit Table Properties: Table2 ------------------------------------ PrimaryKey: RespondentID, QuestionID
- Create a new stored procedure. To do so, click Queries under Objects in the Database window, click New, and then click Create Text Stored Procedure.
Type and then run the following statement:
Create Procedure StoredProc1 AS INSERT INTO Table2 (RespondentID, Response, QuestionID) SELECT Table1.RespondentID, Table1.Question1, 'Question1' AS Expr1 FROM Table1
Edit and run StoredProc1 for each question by opening the procedure in SQL view. For example, the stored procedure for the second question would read:
Alter Procedure StoredProc1 AS INSERT INTO Table2 (RespondentID, Response, QuestionID) SELECT Table1.RespondentID, Table1.Question2, 'Question2' AS Expr1 FROM Table1
Note that the keyword "Create" is used in the initial instance; the keyword "Alter" is used in subsequent instances.
To display the number of positive responses, create a stored procedure similar to step 2, and then run the following statement:
Create Procedure Ayes As SELECT QuestionID Question, COUNT(ALL QuestionID) [Yes count] FROM Table2 WHERE Response = 1 GROUP BY QuestionID
To display the number of negative responses, create a stored procedure similar to step 2, and then run the following statement:
Create Procedure Noes As SELECT QuestionID Question, COUNT(ALL QuestionID) [No count] FROM Table2 WHERE Response = 0 GROUP BY QuestionID
REFERENCES
For more information about append queries, click Microsoft Access Help on the Help menu, type create an append query in the Office Assistant or the Answer Wizard, and then click Search to view the topics returned.
Additional query words: cross tab append questionnaire flat file survey gathering information how to gather summary add up adds
Keywords: kbhowto KB292299