Oracle Database SQL - Practise - Question - Scott Schema Examples
Oracle SQL Practice Questions for Students
All Question are Based on Scott Schema
Exhibits EMP TABLE
Exhibits DEPT TABLE
Exhibits SALGRADE TABLE
Question
1) Display all the records in emp table?
2) Display all the records in emp table where employee belongs to deptno 10?
3) Display all the records in emp table where employee does not belong to deptno 30?
4) Display total number of records in Emp table?
5) Display emp table with salary descending order?
6) Display first five records in employee table?
7) Display all the records in emp table order by ascending deptno, descending salary?
8) Display all employees those who were joined in year 1981?
9) Display COMM in emp table. Display zero in place of null.
10) Display the records in emp table where MGR in 7698,7566 and sal should be greater then 1500
2) Display all the records in emp table where employee belongs to deptno 10?
3) Display all the records in emp table where employee does not belong to deptno 30?
4) Display total number of records in Emp table?
5) Display emp table with salary descending order?
6) Display first five records in employee table?
7) Display all the records in emp table order by ascending deptno, descending salary?
8) Display all employees those who were joined in year 1981?
9) Display COMM in emp table. Display zero in place of null.
10) Display the records in emp table where MGR in 7698,7566 and sal should be greater then 1500
11) Display all employees where employees hired before
01-JAN-1981
12) Display all employees with how many years they have been servicing in the company?
13) Display all employees those were not joined in 1981?
14) Display all employees where their hiredate belongs to third quarter?
15) Display all employees where their salary is less then the Ford’s salary?
16) Display all the records in EMP table along with the rowid?
17) Display all records in EMP table those were joined before SCOTT joined?
18) Display all employees those who were joined in third quarter of 1981?
19) Add 3 months with hiredate in EMP table and display the result?
20) Display the date for next TUESDAY in hiredate column?
21) Find the date, 15 days after today’s date.
22) Write a query to display current date?
23) Display distinct job from emp table?
24) Display all the records in emp table where employee hired after 28-SEP-81 and before 03-DEC-81?
25) Write a query that displays the employee’s names with the first letter capitalized and all other letters lowercase for all employees whose name starts with J, A, or M
26) Display all jobs that are in department 10. Include the location of department in the output.
27) Write a query to display the employee name, department name of all employees who earn a commission
28) Display the empno, ename, sal, and salary increased by 15%.
29) Display ename, sal, grade. Use emp, salgrade table
30) Display all employees and corresponding managers
31) Display all the departments where employee salary greater then average salary of that department.
32) Display all employees whose salary greater then the manager salary?
33) Display employees where length of ename is 5
34) Display all employees where ename start with J and ends with S
35) Display all employees where employee does not belong to 10,20,40
36) Display all employees where jobs does not belong to PRESIDENT and MANAGER?
37) Display the maximum salary in the emp table
38) Display average salary for job SALESMAN
39) Display all three figures salary in emp table
40) Display all records in emp table for employee who does not receive any commission
41) Display all ename where first character could be anything, but second character should be L?
42) Display nth highest and nth lowest salary in emp table?
43) Display all the departments where department has 3 employees?
44) Display emp name and corresponding subordinates. Use CONNECT BY clause.
45) Display sum of salary for each department. The output should be in one record
46) Display all department with Minimum salary and maximum salary?
47) Display all ename, sal, deptno,dname from emp, dept table where all department which has employees as well as department does not have any employees. This query should include non matching rows.
48) Display all ename, sal, deptno from emp, dept table where all employees which has matching department as well as employee does not have any departments. This query should include non matching rows.
Note: In the below query, employee will always have matching record in dept table. Emp, dept table may not be good example to answer this question.
49) Display all ename, sal, deptno from emp, dept table where all employees which has matching and non matching department as well as all departments in dept table which has matching and non matching employees. This query should include non matching rows on both the tables.
Note: In the below query, employee will always have matching record in dept table. Emp, dept table may not be good example to answer this question.
50) Display all ename, empno, dname, loc from emp, dept table without joining two tables
51) Display all the departments where department does not have any employees
52) Display all the departments where department does have atleast one employee
53) Display all employees those who are not managers?
54) Display ename, deptno from emp table with format of {ename} belongs to {deptno}
55) Display total number of employees hired for 1980,1981,1982. The output should be in one record.
56) Display ename, deptno from employee table. Also add another column in the same query and it should display ten for dept 10, twenty for dept 20, thirty for dept 30, fourty for dept 40
57) Display all the records in emp table. The ename should be lower case. The job first character should be upper case and rest of the character in job field should be lower case.
58) Display all employees those who have joined in first week of the month ?
59) Display all empoyees those who have joined in the 49th week of the year?
60) Display empno, deptno, salary, salary difference between current record and previous record in emp table. Deptno should be in descending order.
61) Create table emp1 and copy the emp table for deptno 10 while creating the table
62) Create table emp2 with same structure of emp table. Do not copy the data
63) Insert new record in emp1 table, Merge the emp1 table on emp table.
64) Display all the records for deptno which belongs to employee name JAMES?
65) Display all the records in emp table where salary should be less then or equal to ADAMS salary?
66) Display all employees those were joined before employee WARD joined?
67) Display all subordinate those who are working under BLAKE?
68) Display all subordinate(all levels) for employee BLAKE?
69) Display all record in emp table for deptno which belongs to KING's Job?
70) Display the employees for empno which belongs to job PRESIDENT?
71) Display list of ename those who have joined in Year 81 as MANAGER?
72) Display who is making highest commission?
73) Display who is senior most employee? How many years has been working?
74) Display who is most experienced and least experienced employee?
75) Display ename, sal, grade, dname, loc for each employee.
76) Display all employee whose location is DALLAS?
77) Display ename, job, dname, deptno for each employee by using INLINE view?
78) List ename, job, sal and department of all employees whose salary is not within the salary grade?
79) Use EMP and EMP1 table. Query should have only three columns. Display empno,ename,sal from both tables inluding duplicates.
80) Delete emp table for detpno 10 and 20.
81) Delete all employees those are not getting any commission?
82) Delete all employees those who employeed more then 28 years
83) Add duplicate records in emp1 table. Delete the duplicate records in emp1 table.
84) Delete the employees where employee salary greater then average salary of department salary?
85) Delete all employees those who are reporting to BLAKE?
86) Delete all levels of employees those who are under BLAKE?
12) Display all employees with how many years they have been servicing in the company?
13) Display all employees those were not joined in 1981?
14) Display all employees where their hiredate belongs to third quarter?
15) Display all employees where their salary is less then the Ford’s salary?
16) Display all the records in EMP table along with the rowid?
17) Display all records in EMP table those were joined before SCOTT joined?
18) Display all employees those who were joined in third quarter of 1981?
19) Add 3 months with hiredate in EMP table and display the result?
20) Display the date for next TUESDAY in hiredate column?
21) Find the date, 15 days after today’s date.
22) Write a query to display current date?
23) Display distinct job from emp table?
24) Display all the records in emp table where employee hired after 28-SEP-81 and before 03-DEC-81?
25) Write a query that displays the employee’s names with the first letter capitalized and all other letters lowercase for all employees whose name starts with J, A, or M
26) Display all jobs that are in department 10. Include the location of department in the output.
27) Write a query to display the employee name, department name of all employees who earn a commission
28) Display the empno, ename, sal, and salary increased by 15%.
29) Display ename, sal, grade. Use emp, salgrade table
30) Display all employees and corresponding managers
31) Display all the departments where employee salary greater then average salary of that department.
32) Display all employees whose salary greater then the manager salary?
33) Display employees where length of ename is 5
34) Display all employees where ename start with J and ends with S
35) Display all employees where employee does not belong to 10,20,40
36) Display all employees where jobs does not belong to PRESIDENT and MANAGER?
37) Display the maximum salary in the emp table
38) Display average salary for job SALESMAN
39) Display all three figures salary in emp table
40) Display all records in emp table for employee who does not receive any commission
41) Display all ename where first character could be anything, but second character should be L?
42) Display nth highest and nth lowest salary in emp table?
43) Display all the departments where department has 3 employees?
44) Display emp name and corresponding subordinates. Use CONNECT BY clause.
45) Display sum of salary for each department. The output should be in one record
46) Display all department with Minimum salary and maximum salary?
47) Display all ename, sal, deptno,dname from emp, dept table where all department which has employees as well as department does not have any employees. This query should include non matching rows.
48) Display all ename, sal, deptno from emp, dept table where all employees which has matching department as well as employee does not have any departments. This query should include non matching rows.
Note: In the below query, employee will always have matching record in dept table. Emp, dept table may not be good example to answer this question.
49) Display all ename, sal, deptno from emp, dept table where all employees which has matching and non matching department as well as all departments in dept table which has matching and non matching employees. This query should include non matching rows on both the tables.
Note: In the below query, employee will always have matching record in dept table. Emp, dept table may not be good example to answer this question.
50) Display all ename, empno, dname, loc from emp, dept table without joining two tables
51) Display all the departments where department does not have any employees
52) Display all the departments where department does have atleast one employee
53) Display all employees those who are not managers?
54) Display ename, deptno from emp table with format of {ename} belongs to {deptno}
55) Display total number of employees hired for 1980,1981,1982. The output should be in one record.
56) Display ename, deptno from employee table. Also add another column in the same query and it should display ten for dept 10, twenty for dept 20, thirty for dept 30, fourty for dept 40
57) Display all the records in emp table. The ename should be lower case. The job first character should be upper case and rest of the character in job field should be lower case.
58) Display all employees those who have joined in first week of the month ?
59) Display all empoyees those who have joined in the 49th week of the year?
60) Display empno, deptno, salary, salary difference between current record and previous record in emp table. Deptno should be in descending order.
61) Create table emp1 and copy the emp table for deptno 10 while creating the table
62) Create table emp2 with same structure of emp table. Do not copy the data
63) Insert new record in emp1 table, Merge the emp1 table on emp table.
64) Display all the records for deptno which belongs to employee name JAMES?
65) Display all the records in emp table where salary should be less then or equal to ADAMS salary?
66) Display all employees those were joined before employee WARD joined?
67) Display all subordinate those who are working under BLAKE?
68) Display all subordinate(all levels) for employee BLAKE?
69) Display all record in emp table for deptno which belongs to KING's Job?
70) Display the employees for empno which belongs to job PRESIDENT?
71) Display list of ename those who have joined in Year 81 as MANAGER?
72) Display who is making highest commission?
73) Display who is senior most employee? How many years has been working?
74) Display who is most experienced and least experienced employee?
75) Display ename, sal, grade, dname, loc for each employee.
76) Display all employee whose location is DALLAS?
77) Display ename, job, dname, deptno for each employee by using INLINE view?
78) List ename, job, sal and department of all employees whose salary is not within the salary grade?
79) Use EMP and EMP1 table. Query should have only three columns. Display empno,ename,sal from both tables inluding duplicates.
80) Delete emp table for detpno 10 and 20.
81) Delete all employees those are not getting any commission?
82) Delete all employees those who employeed more then 28 years
83) Add duplicate records in emp1 table. Delete the duplicate records in emp1 table.
84) Delete the employees where employee salary greater then average salary of department salary?
85) Delete all employees those who are reporting to BLAKE?
86) Delete all levels of employees those who are under BLAKE?
87)
Delete all employees those who are only managers?
88) Remove the department in dept table where dept does not have any employees?
89) Remove all grade 2 employees in emp table?
90) Remove all the employees in SMITH's department
91) Remove least paid employee who are reporting to BLAKE ?
92) Remove all employees
who were joined before SMITH joined? 88) Remove the department in dept table where dept does not have any employees?
89) Remove all grade 2 employees in emp table?
90) Remove all the employees in SMITH's department
91) Remove least paid employee who are reporting to BLAKE ?
93) Rename the employee name JONES to ANDY
94) Change the WARD's hiredate to one day ahead
95) Update MARTIN salary same as SMITH's salary
96) Increase the salary 5% for employee those who are earning commission less then 1000
97) Increase 250$ commission for BLAKE's team
98) Increase 100$ for employee who is making more then averge salary of his department?
99) Increase 1% salary for employee who is making lowest salary in dept 10
100) Reduce the commission amount from employee salary for each employee who were joined after ALLEN joined.
101) Increase commission 10$ for employees those who are located in NEW YORK.
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