The document contains examples of SQL queries: 1. Queries to find the maximum and second maximum salaries from an employee table, and the names of the employees receiving those salaries. 2. Queries to display the department names and number of workers in each department, and the names of employees from specific locations. 3. Queries using joins to find the number of employees working on projects and details of employees working on at least one project. 4. Queries to find names of employees in departments with less than two employees and names of highest paid employees by department.

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4. E_ID E_name Dept Salary
1 Imran AWI 65000
2 Yasir Quality 35000
3 Haseeb AWI 48000
4 Adnan S.Engr 27000
5 Ali Shah S.Engr 5000
 Write A SQL Query TO Display Maximum Salary from
Emp Table.
 Write A SQL Query To display Employee name who is
taking maximum Salary.
EMP
(Select MAX(salary) from Emp)
.
Select E_name from Emp Where Salary =
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5. E_ID E_name Dept Salary
1 Imran AWI 65000
2 Yasir Quality 35000
3 Haseeb AWI 48000
4 Adnan S.Engr 27000
5 Ali Shah S.Engr 5000
EMP
 Write A SQL Query TO Display Second Maximum
Salary from Emp Table.
 Write A SQL Query To display Employee name who is
taking Second maximum Salary.
Select MAX(salary) from Emp Where Salary <> (Select MAX(salary) from Emp)
.
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6. E_ID E_name Dept Salary
1 Imran AWI 65000
2 Yasir Quality 35000
3 Haseeb AWI 48000
4 Adnan S.Engr 27000
5 Ali Shah S.Engr 5000
EMP
AWI 2
S.Engr 2
Quality 1
 Write A SQL Query TO Display All the Departemnt
Names Along with No of Worker Working in IT
Select Dept,Count(*) from Emp group by Dept
Select Dept from Emp group by Dept
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7. E_id E_Name Address
1 Imran Jhampir
2 yasir Karachi
3 Hasseb Thatta
4 Adnan lahore
5 Ali karachi
E_id P_id P_name Location
1 P1 Iot Mianwali
5 P2 CCNA Lahore
3 P3 5G STN Rawalpindi
4 P4 AI faislabad
PK
Fk Pk
EMP
Project
Display Employees names who are belong to Karachi, Thatta, Lahore?
Select Emp_name from Emp
where address IN (‘karachi’,’
thatta’,’lahore’)
Select Emp_name from Emp
where address = karachi
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8. E_id E_Name Address
1 Imran Jhampir
2 yasir Karachi
3 Hasseb Thatta
4 Adnan lahore
5 Ali karachi
E_id P_id P_name Location
1 P1 Iot Mianwali
5 P2 CCNA Lahore
3 P3 5G STN Rawalpindi
4 P4 AI faislabad
PK
Fk Pk
EMP
Project
Find The number of Emplyees who are working in project?
Select Emp_name from Emp Where Eid in
Outer Query
Inner Query
(Select Distinct(E_id) from Project)
.
Distanct for
Reduce
redundancy
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9. E_id E_Name Address
1 Imran Jhampir
2 yasir Karachi
3 Hasseb Thatta
4 Adnan lahore
5 Ali karachi
E_id P_id P_name Location
1 P1 Iot Mianwali
5 P2 CCNA Lahore
3 P3 5G STN Rawalpindi
4 P4 AI faislabad
PK
Fk Pk
EMP
Project
Display Detail of Emp who is working on at least one project?
NOTE: its Turn Co-Related Nested Query
When we use Exit or Not Exit
And Top to down procedure
Select * from Emp Where Eid Exists
Outer Query
Inner Query
(Select E_id from Project where E.id=P.id)
.
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10. E_ID E_name Dept Salary
1 Imran AWI 65000
2 Yasir Quality 35000
3 Haseeb AWI 48000
4 Adnan S.Engr 27000
5 Ali Shah S.Engr 5000
EMP
Display name of Employee where department have no of
employees are less than 2
Having count(*) < 2(Select dept from EMP group by Dept )
Select E_name from
Emp where Dept in
Display Highest salary department wise and display name of
employees who is taking?
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