To run the code OPEN MYSQL Administrator, then click on Restore on the left of your screen.
Then click on open backup file and select the Employee_data.sql file.
After selecting the file click on Start Restore.
This process will create a database and tables.
Query1: Create three tables with relevant keys as suggested in the above diagram
Sol:-
Employee TABLE
DROP TABLE IF EXISTS `employee`;
CREATE TABLE `employee` (
`employee_id` int(11) NOT NULL auto_increment,
`Empname` varchar(25) NOT NULL,
`Managerid` int(11) NOT NULL,
`Dateofhire` date NOT NULL,
`Jobname` varchar(15) NOT NULL,
`Salary` decimal(10,2) NOT NULL,
`department_id` int(11) NOT NULL,
`DOB` date NOT NULL,
`address` varchar(30) NOT NULL,
PRIMARY KEY (`employee_id`),
KEY `FK_employee_1` (`department_id`),
CONSTRAINT `FK_employee_1` FOREIGN KEY (`department_id`) REFERENCES `department` (`department_id`)
) ENGINE=InnoDB AUTO_INCREMENT=1012 DEFAULT CHARSET=utf8;Department TABLE
DROP TABLE IF EXISTS `department`;
CREATE TABLE `department` (
`department_id` int(11) NOT NULL default '0',
`Deptname` varchar(30) default NULL,
`deptLocation` varchar(20) default NULL,
`deptFloor` varchar(20) default NULL,
PRIMARY KEY (`department_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Salary TABLE
DROP TABLE IF EXISTS `salary`;
CREATE TABLE `salary` (
`salary_level` int(11) NOT NULL default '0',
`salarymin` int(11) default NULL,
`salarymax` int(11) default NULL,
PRIMARY KEY USING BTREE (`salary_level`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8;
Working with Queries
Query 2: Insert record of 10 employees in the employee table
Sol:-
INSERT INTO `employee` (`employee_id`,`Empname`,`Managerid`,`Dateofhire`,`Jobname`,`Salary`,`department_id`,`DOB`,`address`) VALUES
(1001,'Mark',5001,'2000-08-01','PROGRAMMER','90000.00',902,'1994-05-23','101 Park Street LA'),
(1002,'Mary',5002,'2017-08-23','TESTER','100000.00',902,'1990-04-27','101 Mark Street LA'),
(1003,'Faith',5003,'2018-06-10','HR MANAGER','25000.00',903,'1988-05-05','101 Royal casa LA'),
(1004,'Natalia',5004,'2018-05-26','MANAGER','96000.00',903,'1994-06-28','101 Wardha LA'),
(1005,'Flynn',5005,'2019-12-27','ELECTRICAL ENGG','56000.00',904,'1987-07-29','101 Uchha Kuaa LA'),
(1006,'Max',5006,'2016-07-19','IT MANAGER','19000.00',901,'1994-03-10','101 Lal Kuwa LA'),
(1007,'Ronny',5007,'2018-03-18','PROGRAMMER','27000.00',902,'1990-02-08','101 Mandi House LA'),
(1008,'Sheing',5008,'2014-09-28','ELECTRICAL ENGG','34000.00',904,'1991-01-05','101 Opera Street LA'),
(1009,'Robert',5009,'2019-07-05','MAINTENANCE','78400.00',905,'1993-07-21','101 Nariman House LA'),
(1010,'Kareena',5010,'2015-06-03','TESTER','120000.00',902,'1994-08-24','101 Henton house LA'),
(1011,'Janet',5095,'2014-10-12','PROGRAMMER','90000.00',2011,'1994-08-24','101 Henton house LA');Query 3: Insert record of 5 departments in the department table
Sol:-
INSERT INTO `department` (`department_id`,`Deptname`,`deptLocation`,`deptFloor`) VALUES
(901,'IT','LONDON','1ST'),
(902,'ENGG','LONDON','2ND'),
(903,'HR','LONDON','3RD'),
(904,'ELECTRICAL','LONDON','4TH'),
(905,'MAINTENANCE','LONDON','5TH'),
(2011,'PROGRAMMER1','PARIS','6TH');Query 4: Insert record of 5 salary levels in the salary table
Sol:-
INSERT INTO `salary` (`salary_level`,`salarymin`,`salarymax`) VALUES
(1,15000,30000),
(2,30001,50000),
(3,50001,70000),
(4,70001,90000),
(5,90001,120000);
Query 5: Write a query to display the information about the employees in the employee
table
Sol:- SELECT * FROM employee e;
Query 6: Write a query to display the name of all the employees
Sol:- select Empname from EMPLOYEE;
Query 7: Write a query to display the name of all the employees and their jobname.
Sol:- select Empname, Jobname from EMPLOYEE;
Query 8: Write a query in SQL to display the unique jobname for all the employees
Sol:- select DISTINCT Jobname from EMPLOYEE;
Task 9: Write a query to increase the salary for all the employees by 12%. Display the
empname, jobname and salary after the increment
Sol:- SELECT Empname, Jobname, Salary + (Salary * 12/100) as NewSalary from EMPLOYEE;
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