ORDER

Possible structures:

• String, Symbol just insert it in "ORDER BY #{structure} "
• SQL operator
• Hash
  • key - previsious possible structures.
  • value - options representation
    • Symbol - :last || :first || :asc || :desc
    • String - '<' || '>' or smthng else that passed in to USING
    • Array - with symbols inside
• Array - any possible structures

order: 'z.amount DESC' || :name
# => 'ORDER BY z.amount DESC ' || 'ORDER BY name '
order: [:name, [:_case ...], { amount: [:first, :desc] }]
# => 'ORDER BY name, CASE ..., amount DESC NULLS FIRST '