CREATE TABLE Documents_with_expenses (budget_type_code VARCHAR2)

What is the budget type code with most number of documents.
SELECT budget_type_code FROM Documents_with_expenses GROUP BY budget_type_code ORDER BY COUNT(*) DESC LIMIT 1
SELECT "budget_type_code" FROM "Documents_with_expenses" GROUP BY "budget_type_code" ORDER BY COUNT(*) DESC FETCH FIRST 1 ROWS ONLY