Querying on checkbox values

Huib Aarts — Tue, 24 Jun 2008 07:08:57 +0000

Via the Advanced Find it is very easy to query on all kind of things within MS Dynamics CRM. The functionality is great. The only thing is, it does not always give you the right result. This has nothing to do with the Advanced Find functionality but everything with understanding the underlying Microsoft SQL Server Database.
If you use a bit (checkbox) value, you can assume there are only two values: YES and NO. But this is incorrect. In the database 3 values can be used for a bit value: YES, NO and NULL. On the forms in CRM the NO and the NULL are perceived the same, both as NO. When you query a checkbox, with the query ‘Checkbox Equals No’, you will only get the records where the bit is actually NO. The records with a NULL value in the database are not included in the result. In case you want the NO and the NULL values, you can better query ‘Checkbox Does Not Equal Yes’.

In other words I recommend to query always on the positive (YES) value when querying a checkbox.
So I recommend ‘Checkbox Equals Yes’ and ‘Checkbox Does Not Equal Yes’.

crm.atechnisch.nl » checkbox

Querying on checkbox values