How can I add a compute column, such as "sum(column_a) / sum(column_b)"

[hengaini2055]

This function can largarly extend tools functions.

[hengaini2055]

In perspective, this function is done by using "New Column".

[hubdr]

sum(column_a) / sum(column_b) does not produce a column, just a number. Or are you just asking if computed columns are possible, but gave the wrong example?