Oracle Query Test Sample Questions

Source: Internet
Author: User


1.select Count (*) from employees where last_name like ' _a% '; key:02.select count (*) from Employeeswhere to_char (hire_date, ' YYYY ') =1998;select count (*) from employeeswhere hire_date like '%98 '; key:23select to_char (hire_date, ' YYYY ') from Employees;3.select Job_title, max_salary-min_salary as "Sal_dief" from Jobsorder by Max_salary-min_salary Desc;select Job_title, (max_salary-min_salary) as "Sal_dief" from the Jobsorder by 2 desc;19 Row Records 4.select count (*) from Employeeswhere ( salary>12000 or salary<1000) and job_id! = ' St_man ' and job_id!= ' Sh_clerk '; number:6================select count (* ) from Employeeswhere salary not between + 12000and job_id not in (' St_man ', ' Sh_clerk '); Select Salaryfrom EMPLOYEESW Here salary<1000 and salary>12000;--when it determines that 1000 is false, it does not judge that the back is greater than 12000. Select job_id from Employees;select * from Employeeswhere job_id in (' St_man ', ' Sh_clerk ');--Job title add single quote 5.select count (*) from Employeeswhere to_char (hire_date, ' YYYY ') =1999and to_char (hire_date, ' mm ') =02;key:3select count (*) from EMployeeswhere to_char (hire_date, ' yyyy-mm ') = ' 1999-02 '; 6.select last_name,salary,decode (Trunc (salary/1500), 0, ' A ', 1 , ' B ', 2, ' C ', ' D ') gradefrom employeeswhere last_name like '%s '; 7.select D.department_id,d.department_ Name,l.cityfrom Departments d,locations lwhere d.department_id in (10,40,90) and D.location_id=l.location_id;8.select L.city,c.country_name,r.region_namefrom Locations l,regions r,countries cwhere l.location_id=1000 and l.country_id= C.country_idand c.region_id=r.region_id;9.select m.last_name "Man_name", NVL (E.last_name, ' NO EMPLOYEES ') "EMP_NAME" From Employees m,employees Ewhere M.department_id=100and m.employee_id=e.manager_id (+); 10 rows record Select M.last_name MAN_ NAME,NVL (E.last_name, ' NO EMPLOYEES ') emp_namefrom EMPLOYEES m,employees ewhere m.department_id=100and m.employee_id= E.MANAGER_ID (+); 10select department_id,count (*) Numfrom employeeswhere salary>8000group by department_id; 9 Line record 11select department_id,count (*) Numfrom employeeswhere Salary>5000grouP by department_idhaving Count (*) >3;3 line record 12select last_name,salaryfrom employeeswhere salary> (select salary from Employees where employee_id=110) and Department_id=100;2 row record 13select count (*) Numfrom employeeswhere commission_pct< All (select distinct commission_pct from employees where Salary>12000and commission_pct are not null); 24 Rows of records


Oracle Query Test Sample Questions

Contact Us

The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion; products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the content of the page makes you feel confusing, please write us an email, we will handle the problem within 5 days after receiving your email.

If you find any instances of plagiarism from the community, please send an email to: info-contact@alibabacloud.com and provide relevant evidence. A staff member will contact you within 5 working days.

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.