SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function equals (children 1)
     ExpressionList (children 2)
      Identifier number
      Function age (children 1)
       ExpressionList (children 3)
        Literal \'month\'
        Function minus (children 1)
         ExpressionList (children 2)
          Function now (children 1)
           ExpressionList
          Function toIntervalMonth (children 1)
           ExpressionList (children 1)
            Identifier number
        Function now (children 1)
         ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier system.numbers
   Literal UInt64_10