SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 2)
    Function sum (children 1)
     ExpressionList (children 1)
      Identifier j
    Function avg (children 1)
     ExpressionList (children 1)
      Identifier k
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier x
   Function in (children 1)
    ExpressionList (children 2)
     Identifier i
     Subquery (children 1)
      SelectWithUnionQuery (children 1)
       ExpressionList (children 1)
        SelectQuery (children 2)
         ExpressionList (children 1)
          Identifier number
         TablesInSelectQuery (children 1)
          TablesInSelectQueryElement (children 1)
           TableExpression (children 1)
            Function numbers (children 1)
             ExpressionList (children 1)
              Literal UInt64_4