Well, yeah, but I mean the concept (grepping in tabular data).

If, hypothetically, bash had database integration, ls Columns would probably return something like

  foo	varchar	30	NOT NULL
  bar	decimal	 8
  baz	int	 4

Which would be a royal PITA to search for anything in—if I were to search for ‘int’ I'd get all int columns and any columns with int in the name….

I could've used an example involving process lists, but I didn't want to trigger PTSD in anyone who's had to grep the output of ‘ps’ for anything non-trivial. (Plus, the database thing was something I actually did a few days ago.)