COMPUTER SCIENCE

BY Vivek Pandey

Database-SQL

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Create a employee table .

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CREATE TABLE Employee (

EMP_ID INT NOT NULL PRIMARY KEY AUTO_INCREMENT,

FIRST_NAME CHAR(25),LAST_NAME CHAR(25),SALARY INT(15),JOINING_DATE DATETIME,DEPARTMENT CHAR(25)

);

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EMP_ID FIRST_NAME LAST_NAME SALARY DEPARTMENT JOINING DATE

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INSERT INTO EMPLOYEE

(EMP_ID, FIRST_NAME, LAST_NAME, SALARY, JOINING_DATE, DEPARTMENT) VALUES

(001, ‘VIVEK', ‘PANDEY', 100000, '14-03-20 ', 'HR'),(002, ‘VIKASH', 'Verma', 80000, '14-06-11 ', 'Admin'),(003, 'Vishal', 'Singhal', 300000, '14-02-20 ', 'HR'),

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INSERT INTO EMPLOYEE

(EMP_ID, FIRST_NAME, LAST_NAME, SALARY, JOINING_DATE, DEPARTMENT) VALUES

(001, ‘VIVEK', ‘PANDEY', 100000, '14-03-20 ', 'HR'),(002, ‘VIKASH', 'Verma', 80000, '14-06-11 ', 'Admin'),(003, 'Vishal', 'Singhal', 300000, '14-02-20 ', 'HR'),

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EMP_ID FIRST_NAME LAST_NAME SALARY DEPARTMENT JOINING DATE

1 VIVEK PANDEY 1000000 Hr 14-03-2020

Write an SQL query to fetch “FIRST_NAME”

from employee table in upper case.

Select upper(FIRST_NAME) from employee ;

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. Write an SQL query to fetch unique values of DEPARTMENT from Employee table.

Select distinct DEPARTMENT from employee;

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Write an SQL query to print details of employees with DEPARTMENT name as “Admin”

Select * from employee where DEPARTMENT like 'Admin%';.

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Write an SQL query to print details of the Employee whose FIRST_NAME contains ‘a’.

Select * from employee where FIRST_NAME like '%a%';

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Write an SQL query to print details of the employee whose SALARY lies between 100000 and 500000.

Select * from employee where SALARY between 100000 and 500000;

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Write an SQL query to print details of the employees who have joined in

march’2020.

Select * from employee where year(JOINING_DATE) = 2020 and

month(JOINING_DATE) = 3;

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Write an SQL query to print details for employees with the first name as “vivek” and “vishal” from Employee table.

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Select * from employee where FIRST_NAME in (‘vivek’,’vishal');

Write an SQL query to fetch employee names with salaries >= 50000 and <= 100000.

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SELECT CONCAT(FIRST_NAME, ' ', LAST_NAME) As employee_Name, SalaryFROM employee WHERE employee_ID IN (SELECT employee_ID FROM employee WHERE Salary BETWEEN 50000 AND 100000);

Write an SQL query to show only odd rows from a table.

SELECT * FROM employee WHERE MOD (employee_ID, 2) <> 0;

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Write an SQL query to show only even rows from a table.

SELECT * FROM employee WHERE MOD (employee_ID, 2) = 0;

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Write an SQL query to show records from one table that another table does not have.

SELECT * FROM employeeMINUSSELECT * FROM department ;

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Write an SQL query to show records from one table that another table does not have.

SELECT * FROM employeeMINUS

SELECT * FROM department ;

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Write an SQL query to show the top n (say 10) records of a table.

SELECT * FROM employee ORDER BY Salary DESC LIMIT 10;

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