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## Return a single value from a variable table in DAX by column name

How can I return the desc column value from this variable table?

my_desc =
VAR my_table = TOPN(1, DESC_TABLE)
return my_table[DESC]

Where DESC is a column in DESC_TABLE.

This is a simplified version of my problem - the real one has a SWITCH to determine my_table from multiple different tables, in all cases I use TOPN(1, .) to get the first row of each table.

The error I get is:
The expression refers to multiple columns. Multiple columns cannot be converted to a scalar value.

I've tried using VALUES() function.

1 ACCEPTED SOLUTION
Community Support

Hi @vfx661 ,

Here's the measure returns the result based on your scenario.

``````my_desc =
VAR my_table = TOPN(1,'DESC_TABLE')
return MAXX(my_table,[DESC])``````

In addition to MAXX, MINX, if it is a numeric column, you can also use SUMX.

Also you can use summarize to return the single column.

``````my_desc =
VAR my_table = TOPN(1,'DESC_TABLE')
return SUMMARIZE(my_table,[DESC])``````

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.

2 REPLIES 2
Community Support

Hi @vfx661 ,

Here's the measure returns the result based on your scenario.

``````my_desc =
VAR my_table = TOPN(1,'DESC_TABLE')
return MAXX(my_table,[DESC])``````

In addition to MAXX, MINX, if it is a numeric column, you can also use SUMX.

Also you can use summarize to return the single column.

``````my_desc =
VAR my_table = TOPN(1,'DESC_TABLE')
return SUMMARIZE(my_table,[DESC])``````

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.

Super User

could you pls provide some sample data and expected output?

Proud to be a Super User!

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