mysql explained clearly with subtopics

1. MYSQL

2. What is MySQL?
 MySQL is a relational database management system
 MySQL is open-source
 MySQL is free
 MySQL is ideal for both small and large applications
 MySQL is very fast, reliable, scalable, and easy to use
 MySQL is cross-platform
 MySQL is compliant with the ANSI SQL standard
 MySQL was first released in 1995
 MySQL is developed, distributed, and supported by Oracle
Corporation
 MySQL is named after co-founder Monty Widenius's
daughter: My

3. Commands
 SELECT - extracts data from a database
 UPDATE - updates data in a database
 DELETE - deletes data from a database
 INSERT INTO - inserts new data into a database
 CREATE DATABASE - creates a new database
 ALTER DATABASE - modifies a database
 CREATE TABLE - creates a new table
 ALTER TABLE - modifies a table
 DROP TABLE - deletes a table
 CREATE INDEX - creates an index (search key)
 DROP INDEX - deletes an index

4. Creating Tables
 Create table Customers(customerId int,customername
varchar(20),contactname varchar(20),address varchar(25),city
varchar(15),postalcode varchar(8),country varchar(15);

5. ->The SELECT statement is used to select data from a database.
The data returned is stored in a result table, called the result-
set. .
Example
 SELECT CustomerName, City, Country FROM Customers;
OUTPUT:
SELECT Statement

6. ALTER TABLE
Alt
Alter command can perform the following operation:
->Adding new column to the existing table.
->Dropping existing column from table.
->Modifying column definition in table.
->Changing the name of column.
->Adding or dropping constraints after table creation.
 ADD COLUMN:
ALTER TABLE table_name
ADD column_name datatype;
 DROP COLUMN:
ALTER TABLE table_name
DROP COLUMN column_name;

7. .
 MODIFY COLUMN
ALTER TABLE table_name
MODIFY COLUMN column_name datatype;
EXAMPLES:
ALTER TABLE Persons ADD DateOfBirth date;

8. INSERT INTO Syntax
 It is possible to write the INSERT INTO statement in two ways:
1. Specify both the column names and the values to be inserted.
INSERT INTO table_name (column1, column2, column3, ...)
VALUES (value1, value2, value3, ...);
2. If you are adding values for all the columns of the table, you do not need
to specify the column names in the SQL query. However, make sure the
order of the values is in the same order as the columns in the table.
INSERT INTO table_name
VALUES (value1, value2, value3, ...);

9. WHERE Syntax
 The WHERE clause is used to filter records.
 It is used to extract only those records that fulfill a specified condition.
SELECT column1, column2, FROM table_name WHERE condition;
SELECT * FROM Customers WHERE Country = 'Mexico';

10. GROUP BY Syntax
 SELECT column_name(s) FROM table_name WHERE condition
GROUP BY column_name(s)
ORDER BY column_name(s);
 SELECT COUNT(CustomerID), Country
FROM Customers
GROUP BY Country;

11. Joining Tables
 A JOIN clause is used to combine rows from two or more tables, based
on a related column between them.
 Types of Joins in MySQL:
INNER JOIN: Returns records that have matching values in both tables
LEFT JOIN: Returns all records from the left table, and the matched records from the right
table
RIGHT JOIN: Returns all records from the right table, and the matched records from the left
table
CROSS JOIN: Returns all records from both tables

12.  Prepared by:
 Sudha Suryasnata
 V.kruthika
 Supriya Pradhan
 NamrataPradhan
 Subhalaxmi Muduli
Thank you