Node: Database: Database specific styles for quotation and parameters should be hidden from the user

[FunctionPoint]

So always assume then

• Table and field names are double-quoted.
• Parameters are indicated by a question mark and not numbered.
  (So parameter arguments must always be in order)

For databases requiring single quotes or numbered parameters,
do substitutions before query execution.

Maybe only do this for SqlTable subclasses, to prevent substitution errors
on database specific queries.

Examples and unit tests can be simplified after this is done.
Also update the Node App tutorial then.