Go Premium for a chance to win a PS4. Enter to Win

x
?
Solved

ColdFusion Update Number Type Field in Access

Posted on 2012-12-20
5
Medium Priority
?
333 Views
Last Modified: 2012-12-20
My website accepts number values and I receive an error if no value is inputted. (only works when a value is present)

Problem:
I would like to delete this value if needed without receiving this error:
Data type mismatch in criteria expression

My Access database has a number type field and using cf_sql_varchar in my update statement.
I've tried using other cf_sql types: number, integer, etc without success.

Would the solution be to insert a default value of 0 if no data is present or to change the cf_sql statement that would accept a null value for the number type field in Access?
0
Comment
Question by:DJPr0
  • 2
  • 2
5 Comments
 
LVL 3

Expert Comment

by:jdthedj
ID: 38710884
You could use the IsNumeric function to check the value before adding to your database.  It is not a CF_SQL_VARCHAR which is for text.  I assume you are using <CFQUERYPARAM>  If you are (and you should be) you don't specify any CFSQLTYPE
0
 

Author Comment

by:DJPr0
ID: 38710986
You could use the IsNumeric function to check the value before adding to your database.

How will this help to delete the value?

I want to update the field to null or 0.
0
 
LVL 3

Expert Comment

by:jdthedj
ID: 38711002
Try this

<CFFUNCTION NAME="NullVal" RETURNTYPE="Numeric">
  <CFARGUMENT NAME="Amt" DATATYPE="String" REQUIRED="True">
  <CFIF IsNumeric(Amt)>
    <CFRETURN Amt>
  <CFELSE>
    <CFRETURN 0>
  </CFIF>
</CFFUNCTION>

The function will change any null to a zero
0
 
LVL 52

Accepted Solution

by:
_agx_ earned 2000 total points
ID: 38711291
I want to update the field to null or 0.

EDIT To set the value to 0, use the val() function.  It automatically converts non-numeric values like an empty string to  0.  (I'm assuming your column type is INTEGER. Change if needed ...)

              UPDATE TableName
              SET  NumColumn = <cfqueryparam value="#val(form.yourVariable)#" cfsqltype="cf_sql_integer">
              WHERE ID = ....

To set the value to null, use the NULL attribute

              UPDATE TableName
              SET       NumColumn = <cfqueryparam value="#form.yourVariable#"
                                                      cfsqltype="cf_sql_integer"
                                                      null="#not IsNumeric(form.yourVariable)#" >
              WHERE ID = ....


Would the solution be to insert a default value of 0 if no data is present or to change the cf_sql statement that would accept a null value for the number type field in Access?

All depends on your needs.  Sometimes 0 is better, other times null is.  When I want to indicate something has no value, like for a date field, I prefer NULL instead of entering a bogus date like 12/31/1899. For numbers it can go either way.
0
 

Author Closing Comment

by:DJPr0
ID: 38711745
Worked perfectly, thanks _agx_!
0

Featured Post

Visualize your virtual and backup environments

Create well-organized and polished visualizations of your virtual and backup environments when planning VMware vSphere, Microsoft Hyper-V or Veeam deployments. It helps you to gain better visibility and valuable business insights.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

If you need a simple but flexible process for maintaining an audit trail of who created, edited, or deleted data from a table, or multiple tables, and you can do all of your work from within a form, this simple Audit Log will work for you.
Windows Explorer lets you open cabinet (cab) files like any other folder. In VBA you can easily handle normal files and folders, but opening and indeed creating cabinet files takes a lot more - and that's you'll find here.
With Secure Portal Encryption, the recipient is sent a link to their email address directing them to the email laundry delivery page. From there, the recipient will be required to enter a user name and password to enter the page. Once the recipient …
Look below the covers at a subform control , and the form that is inside it. Explore properties and see how easy it is to aggregate, get statistics, and synchronize results for your data. A Microsoft Access subform is used to show relevant calcul…

916 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question