SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 2) ExpressionList (children 1) Function count (children 1) ExpressionList TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Subquery (children 1) SelectWithUnionQuery (children 1) ExpressionList (children 1) SelectQuery (children 4) ExpressionList (children 2) Function less (children 1) ExpressionList (children 2) Identifier number Literal UInt64_100 Identifier number TablesInSelectQuery (children 1) TablesInSelectQueryElement (children 1) TableExpression (children 1) Function numbers (children 1) ExpressionList (children 1) Literal UInt64_2000 ExpressionList (children 1) OrderByElement (children 1) Function less (children 1) ExpressionList (children 2) Identifier number Literal UInt64_100 Literal UInt64_10