Ruby, How Do I Love Thee? Let Me Count the Ways...

I just have to say that Ruby is very, very convenient.

Today while working I needed to figure out which ethernet MAC was
missing from a device.  So I selected and copied the complete text of
a web page displaying all the MACs on the device.  In another window,
using MySQL I selected a list of all the MACs that device SHOULD have
been showing me.

The dilemma--how to eliminate those MACs I could see quickly and
efficiently to leave the missing MACs?  Manually comparing the two
lists (one from the device, one from the database) would take far too
long.

Enter Ruby, irb specifically, as a quick-and-dirty text processing
CLI.  I pasted my list of MACs from the device into a temporary file,
then did this with irb:

irb(main):001:0> puts "SELECT * FROM authorized_macs WHERE device_id=
2342592 AND mac!='" +
File.read('macs_seen_on_device.txt').split(/[\r\n]+/).map{|l|
l.split(/\s+/).first}.join("' AND mac!='") + "';"

Thank you, Ruby, for making generating an SQL statement to show me the
missing MACs quick and simple.

Now for a question:

I've been looking at Pry to enhance my irb CLI experience and blend a
bit of shell-like CLI in as well.  Is there a database module along
the lines of Pry I could use to also integrate a MySQL CLI as well?
I'd love to use Ruby as my system CLI shell and MySQL CLI
simultaneously... *drool*

Aaron out.