Re: [MS_AccessPros] Relationship Definition

 

The data type of the Product Class is text. How to I check if it is a true Null value?. How do I set it to Null if it's not filled in on the data entry form?.

Sarah
---In MS_Access_Professionals@yahoogroups.com, <JohnV@...> wrote :

Sarah-

What is the data type of Product Class?  As long as the field in the Product table contains a true Null value, you should be able to define the rule.  I suspect you have some non-Null or other invalid values.

John Viescas, Author

Effective SQL

SQL Queries for Mere Mortals 

Microsoft Access 2010 Inside Out

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Building Microsoft Access Applications 

http://www.viescas.com/ 

(Paris, France)

On Jul 12, 2016, at 7:46 PM, sarahk@... [MS_Access_Professionals] <MS_Access_Professionals@yahoogroups.com> wrote:

I have 2 tables:

Product Class

Product

The Product table has a field Product Class that relates to the Product Class table. This field in the Product table is optional.

 I am trying to define a Relationship with 'referential integrity' between the Product Class and the Product table, but because I have records in the Product table that dont have the Class filled in, I am getting a message 'Product violates referential integrity'. Is there any way around this?. I have tried all Join Types but I am getting the same message on all of them. 

Thanks for your answers.

Sarah

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Posted by: sarahk@schemesoftware.com

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