Error Number 1054 Unknown column 'Array' in 'where clause'

[eluser]WanWizard[/eluser]
You define $data as an array. If the query doesn't return a result, the empty array is returned.

As a rule, either always return the same type of value, or return FALSE when the method doesn't produce any results.
Also, if your method has multiple possible results, check the result before doing anything with it.