SELECT * FROM tab; Desc employees; desc jobs; select first_name, last_name, salary, job_title from employees, jobs WHERE jobs.job_id = employees.job_id / select first_name, last_name,job_title,start_date,end_date,department_name FROM employees, jobs,job_history,departments WHERE job_history.employee_id=employees.employee_id and job_history.job_id=jobs.job_id and job_history.department_id=departments.department_id / Resultado del Script 1 Resultado del Script 2 Resultado del Script 3 Resultado del Script 4 Resultado del Script 5 https://oracle-base.com/articles/misc/sqlxml-sqlx-generating-xml-content-using-sql https://codebeautify.org/xmlvalidator