[wiml]

If you really want to, there's also the `join` command, which has been part of the standard unix toolset for longer than many of us have been alive.

[mhuffman]

Many years ago, I got sidetracked with sorting, joining, and processing (grepping, counting, etc) large text files ... until I realized I was just re-inventing a very slow database.

[boneitis]

As a sysadmin/SRE who occasionally has to join data, I am very intrigued. Thanks for the callout!