Whenever we think about SQL, either we need Oracle or MySQL.
If you have either of them , it is well and good. But if you dont have ,then you are running towards the dead end.
You cannot download Oracle , if you have a Slow or limited internet connection as the Size is too large.
MySQL is in turn a light weight, but even it is about 35 MB.
To stop your worries,here comes a software W-AMP. W-AMP stands for Windows Apache MySQL Php.This is really a handy tool , weighs just around 16 MB in size.As the name says, you can run Php, execute SQL Queries.And after everything, you can deploy Joomla.
Tail Cut : If you are Mac Download the Mac Version X-AMP.