title: How to select only a subset of dataframe columns in julia
body: <p>I have a Dataframe of several columns say column1, column2...column100. How do I select only a subset of the columns eg (not column1) should return all columns column2...column100.</p>
  
  <pre><code>data[[colnames(data) .!= "column1"]])
  </code></pre>
  
  <p>doesn't seem to work.</p>
  
  <p>I don't want to mutate the dataframe. I just want to select all the columns that don't have a particular column name like in my example</p>