 -- 1. Create the following table: Table Name: Employee EMPLOYEE_ID FIRST_NAME LAST_NAME SALARY JOINING_DATE         -- DEPARTMENT 


create table Employee(
  EMPLOYEE_ID int primary key,
  FIRST_NAME char(255),
  LAST_NAME char(255),
  SALARY float,
  JOINING_DATE datetime ,
  DEPARTMENT char(255)
);

-- 1.John Abraham 1000000 01-JAN-13 12.00.00 AM Banking 2 Michael Clarke 800000 01-JAN-13 12.00.00 AM Insurance 3 Roy -- Thomas 700000 01-FEB-13 12.00.00 AM Banking 4 Tom Jose 600000 01-FEB-13 12.00.00 AM Insurance 5 Jerry Pinto 650000 -- 01-FEB-13 12.00.00 AM Insurance 6 Philip Mathew 750000 01-JAN-13 12.00.00 AM Services 7 TestName1 123 650000 
-- 01-JAN-13 12.00.00 AM Services 8 TestName2 Lname% 600000 01-FEB-13 12.00.00 AM Insurance

INSERT into Employee values(1,"John", "Abraham", 1000000,"2013-01-01 12:00:00","Banking ");
INSERT into Employee values(2,"Michael", "Clarke", 800000,"2013-01-01 12:00:00 ","Insurance ");
INSERT into Employee values(3,"Roy", "Thomas" ,700000,"2013-02-01 12:00:00","Banking ");
INSERT into Employee values(4,"Tom ","Jose" ,600000,"2013-02-01 12:00:00","Insurance ");
INSERT into Employee values(5,"Jerry", "Pinto" ,650000,"2013-02-01 12:00:00 ","Insurance ");
INSERT into Employee values(6,"Philip", "Mathew", 750000,"2013-01-01 12:00:00 "," Services ");
INSERT into Employee values(7,"TestName1", "123" ,650000,"2013-01-01 12:00:00 ","Services ");
INSERT into Employee values(8,"TestName2", "Lname" ,600000,"2013-02-01 12:00:00 ","Insurance");
INSERT into Employee values(9,"TestName3", "Lname%" ,600000,"2013-07-05 12:00:00 ","Insurance");
INSERT into Employee values(10,"TestName4", "Lname2%" ,600000,"2013-02-07 12:00:00 ","Insurance");
INSERT into Employee values(11,"TestName5", "LnaCme2%" ,600000,"2013-02-07 12:00:00 ","Insurance");


-- 2. Get all employee details from the employee table

select *from employee

-- 3. Get First_Name, Last_Name from employee table

select FIRST_NAME,LAST_NAME from employee

-- 4. Get First_Name from employee table using alias name “Employee Name” 

select FIRST_NAME as [Employee Name] from employee

-- 5. Get employee details from employee table whose employee name is “John” 

select * from employee where FIRST_NAME="John"

-- 6. Get employee details from employee table whose employee name are “John” and “Roy” 

select * from employee where FIRST_NAME in("John","Roy")

-- 7. Get employee details from employee table whose employee name are not “John” and “Roy” 

select * from employee where FIRST_NAME not in("John","Roy")

-- 8. Get employee details from employee table whose first name starts with 'J' 

select * from employee where FIRST_NAME like 'J%'

-- 9. Get employee details from employee table whose first name contains 'o' 

select * from employee where FIRST_NAME like '%o%'

-- 10. Get employee details from employee table whose Salary between 500000 and 800000 

select * from employee where SALARY between 500000 and 800000

-- 11. Get unique DEPARTMENT from employee table 

select distinct DEPARTMENT from employee

-- 12. Select TOP 2 salary from employee table 

select  SALARY from employee order by salary desc limit 2

-- 13. Store the output of below query in common table expression, and then find out the average of their salary 

WITH getavg(salary) as 
(select avg(salary) from Employee)
select salary from  getavg

-- 14. Get employee details from employee table whose Salary between 500000 and 800000 

select * from employee where SALARY between 500000 and 800000

-- 15. Get names of employees from employee table who has '%' in Last_Name. 

select FIRST_NAME from Employee where  LOCATE("%", LAST_NAME)<>0;

-- 16. Give 10% incentive to each employee, find out the employee whose incentive amount is more than 1lac, using 
-- derived table

select salary from (select (salary*0.1)as salary from Employee ) where salary>100000

created 2 years ago by vasu bhimani

MySQL online editor

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About MySQL

MySQL is a open-source, free and very popular relational database management system which is developed, distributed and supported by Oracle corporation.

Key Features:

Open-source relational database management systems.
Reliable, very fast and easy to use database server.
Works on client-server model.
Highly Secure and Scalable
High Performance
High productivity as it uses stored procedures, triggers, views to write a highly productive code.
Supports large databases efficiently.
Supports many operating systems like Linux*,CentOS*, Solaris*,Ubuntu*,Windows*, MacOS*,FreeBSD* and others.

Syntax help

Commands

1. CREATE

CREATE TABLE table_name (
                column1 datatype,
                column2 datatype,
                ....);

Example

CREATE TABLE EMPLOYEE (
  empId INTEGER PRIMARY KEY,
  name TEXT NOT NULL,
  dept TEXT NOT NULL
);

2. ALTER

ALTER TABLE Table_name ADD column_name datatype;

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Dave', 'Sales');

3. TRUNCATE

TRUNCATE table table_name;

4. DROP

DROP TABLE table_name;

5. RENAME

RENAME TABLE table_name1 to new_table_name1;

6. COMMENT

Single-Line Comments:

 --Line1;

Multi-Line comments:

   /* Line1,
   Line2 */

DML Commands

1. INSERT

INSERT INTO table_name (column1, column2, column3, ...) VALUES (value1, value2, value3, ...);

Note: Column names are optional.

Example

INSERT INTO EMPLOYEE VALUES (0001, 'Ava', 'Sales');

2. SELECT

SELECT column1, column2, ...
FROM table_name
[where condition];

Example

SELECT * FROM EMPLOYEE where dept ='sales';

3. UPDATE

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

Example

UPDATE EMPLOYEE SET dept = 'Sales' WHERE empId='0001';

4. DELETE

DELETE FROM table_name where condition;

Example

DELETE from EMPLOYEE where empId='0001';

Indexes

1. CREATE INDEX

  CREATE INDEX index_name on table_name(column_name);

To Create Unique index:

  CREATE UNIQUE INDEX index_name on table_name(column_name);

2. DROP INDEX

DROP INDEX index_name ON table_name;

Views

1. Create a View

Creating a View:
CREATE VIEW View_name AS 
Query;

2. How to call view

SELECT * FROM View_name;

3. Altering a View

ALTER View View_name AS 
Query;

4. Deleting a View

DROP VIEW View_name;

Triggers

1. Create a Trigger

CREATE TRIGGER trigger_name trigger_time trigger_event
    ON tbl_name FOR EACH ROW [trigger_order] trigger_body
/* where
trigger_time: { BEFORE | AFTER }
trigger_event: { INSERT | UPDATE | DELETE }
trigger_order: { FOLLOWS | PRECEDES } */

2. Drop a Trigger

DROP TRIGGER [IF EXISTS] trigger_name;

Stored Procedures

1. Create a Stored Procedure

CREATE PROCEDURE sp_name(p1 datatype)
BEGIN
/*Stored procedure code*/
END;

2. How to call Stored procedure

CALL sp_name;

3. How to delete stored procedure

DROP PROCEDURE sp_name;

Joins

1. INNER JOIN

SELECT * FROM TABLE1 INNER JOIN TABLE2 where condition;

2. LEFT JOIN

SELECT * FROM TABLE1 LEFT JOIN TABLE2 ON condition;

3. RIGHT JOIN

SELECT * FROM TABLE1 RIGHT JOIN TABLE2 ON condition;

4. CROSS JOIN

SELECT select_list from TABLE1 CROSS JOIN TABLE2;