Add limit to result set for getFromDb

[rlwy]

Add a limit parameter, with default of 1, to the select query.

[codemedic]

It wouldn't be a good idea to add a new parameter (and functionality) with a default value that would alter the current behaviour.
Please refer to my comments in your PR for this issue.

[codemedic]

I am closing PR #13 as there was no response from the creator.