Question

I used a case to change boolean column values to a text string that actually means something. Firstly, when doing a WHERE statement on these columns do I use the boolean values or the updated text strings?

I used:

WHERE TrainingProgram.blnInCatalogue = 'Yes' 
  AND TrainingProgram.blnActive = 'Inactive'

But I get the error:

Conversion failed when converting the varchar value ‘Yes’ to data type bit.

Am I doing something wrong?

Answer 1

For true, try using:

WHERE TrainingProgram.blnInCatalogue <> 0 

For false, try using:

WHERE TrainingProgram.blnInCatalogue = 0 

The blnInCatalogue column is a bit field, and it doesn’t understand what the string ‘Yes’ means. It only knows 0 or 1.