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I enjoy how it builds on previous success WITH its use of regex. There is nothing quite LIKE ideas from the 50's haunting you in your sleep.

   SELECT age FROM Customers WHERE Country='Mexico'

Could be written something like:

   table.customers.filter(c=>c.country == "Mexico").age

The filter is kinda ugly, there is this strange assumption there to be only one Mexico in country.

Clearly the most advanced approach is this:

  //customer[country="mexico"]/age

1999!