SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 5)
    Identifier pk1
    Identifier pk2
    Identifier pk4
    Identifier pk3
    Function count (alias occurences) (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier landing
   ExpressionList (children 4)
    Identifier pk1
    Identifier pk2
    Identifier pk4
    Identifier pk3
   ExpressionList (children 4)
    OrderByElement (children 1)
     Identifier pk1
    OrderByElement (children 1)
     Identifier pk2
    OrderByElement (children 1)
     Identifier pk4
    OrderByElement (children 1)
     Identifier pk3
