Forum Discussion
Using value from column to affect calculation in Power Query
Yes, there is a way.
Use Expression.Evaluate
You can build a string from the first 3 columns ( either by appending with & or use Text.Combine and then just pass that to Expression.Evaluate()
Thank you, so much. This is exactly what I am looking for. I am curious about one thing though.
Expression.Evaluate(Text.Combine({"5","=","5"}, " ")) will return true. Which is good.
Expression.Evaluate(Text.Combine({"hello","=","hello"}, " ")) will return an error. "The name 'hello' doesn't exist in the current context."
Do you know why we cannot use "=" operator for alphabetical comparisons?
There's nothing wrong with the "="
See the 3rd example
https://learn.microsoft.com/en-us/powerquery-m/expression-constant#example-3
You need Expression.Constant
Thanks for the reply, but could you be a bit more specific how Expression.Constant is used? Is this wrapped inside of the Expression.Evaluate?
The documenation is extremely short on this function and I do not know what it does exactly.