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TomasBA
New Member

Methodology to transform a changing quantity of columns

I have a initial table with a variable quantity of columns, I would like to transform the columns making the operation robust, i.e not depending on the column names.
Function to be applied on all columns: extraction of the first character

Technique intended : make a list with the existing column names and apply the transformation to the list of columns.

 

Which is the efficient method to do so?

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TomasBA_2-1672326024282.png

 

TomasBA_1-1672326004849.png

 

1 ACCEPTED SOLUTION
v-stephen-msft
Community Support
Community Support

Hi @TomasBA ,

 

Try the Text.Start function. It returns the first count characters of text as a text value.

Text.Start - PowerQuery M | Microsoft Learn

 

And then try pivot/unpivot.

Pivot columns - Power Query | Microsoft Learn

Unpivot columns - Power Query | Microsoft Learn

 

 

 

Best Regards,

Stephen Tao

 

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

 

View solution in original post

1 REPLY 1
v-stephen-msft
Community Support
Community Support

Hi @TomasBA ,

 

Try the Text.Start function. It returns the first count characters of text as a text value.

Text.Start - PowerQuery M | Microsoft Learn

 

And then try pivot/unpivot.

Pivot columns - Power Query | Microsoft Learn

Unpivot columns - Power Query | Microsoft Learn

 

 

 

Best Regards,

Stephen Tao

 

If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.

 

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