How to execute unbalanced dataset in JMeter

Question

I have following dataset. I want to do a load test in JMeter with this csv file. But I cannot read the file because all the columns are not filled with data. How do I write the code for that in JMeter?

Dataset:

This is the code I wrote so far:

function getstr(){ var str= ${soccd1}+","+${soccd2}+","+${soccd3};

Answer 1

If you have a test.csv file like this:

A,B,C
A1,B1,C1,
A2,,C2
,B3,C3

Or if you prefer screenshots from Excel:

If you setup CSV Data Set Config like this:

It will normally read the data, when there is nothing in the "cell" the relevant JMeter Variable will just be empty. You can observer JMeter Variables (and properties) with their respective values using Debug Sampler