SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 3) ExpressionList (children 2) Identifier number Identifier tuple TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Subquery (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 1) ExpressionList (children 2) Literal UInt64_1 (alias number) Literal Tuple_(UInt64_2, UInt64_3) (alias tuple) Function in (children 1) ExpressionList (children 2) Function tuple (children 1) ExpressionList (children 2) Identifier number Identifier tuple Literal Tuple_(Tuple_(UInt64_1, Tuple_(UInt64_2, UInt64_3)), Tuple_(UInt64_4, Tuple_(UInt64_5, UInt64_6)))