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In this document you will learn

MySQL Structured Query Language (SQL) Communicating with a MySQL backend via the PHP

MySQL , Select, where, order by Database Design Concepts

MySQL

is a relational database management system (RDBMS) that runs as a serverproviding multi-user access to a number of databases. It is named after developerMichael Widenius daughter, My.

The SQL phrase stands for Structured Query Language.

MySQL is the most popular Open Source Relational SQL database management system.MySQL is one of the best RDBMS being used for developing web based softwareapplications.

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MySQL Data TypesSee the table that follows for the potential data or field types in MySQL.

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MySQL Quick ReferenceDatabase Manipulation CommandsUse the following commands to create and make changes to your database andtables.

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SQL - STRUCTURED QUERY LANGUAGE

SQL is a standard language for accessing and manipulating databases

What Can SQL do?

SQL can retrieve data from a database

SQL can insert records in a database

SQL can update records in a database

SQL can delete records from a database

SQL can create new databases

SQL can create new tables in a database

SQL can create stored procedures in a database

SQL can create views in a database

SQL can set permissions on tables, procedures, and views

SQL - often referred to as Structured Query Language) is a

programming language designed for managing data in relational

database management systems (RDBMS).

Originally based upon relational algebra and tuple relationalcalculus, its scope includes data insert, query, update and delete,

schema creation and modification, and data access control.

SQL was one of the first commercial languages for Edgar F. Codd's

relational model, as described in his influential 1970 paper, "A

Relational Model of Data for Large Shared Data Banks".Despite not

adhering to the relational model as described by Codd, it became the

most widely used database language.

SQL Statements

Most of the actions you need to perform on a database are done with

SQL statements.

SQL can be divided into two parts:

The Data Manipulation Language (DML)

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Data Definition Language (DDL)

The query and update commands form the DML part of SQL:

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

The DDL part of SQL permits database tables to be created or deleted.

The most important DDL statements in SQL are:

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

If you were thinking of what was the difference between MySQL and

SQL. Now here is the answer.

SQL is a language used with databases; MySQL is a database

application that uses in SQL.

SQL is a common database computer language designed for the retrieval andmanagement of data in relational database management systems (RDBMS) --basically a standard interactive and programming language for querying andmodifying data and managing databases. Very standard for uses rangingfrom the simplest Microsoft Access applications, up to complex multi-server distributed Oracle applications.

MySQL is a multithreaded, multi-user SQL database management system (DBMS)providing multi-user access to a number of databases. MySQL is commonly

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the back engine database for a great many applications, and often thedatabase of choice for web-based applications.

SQL Statements

Most of the actions you need to perform on a database are done with SQLstatements.

Entering in Command Prompt

Syntax:

cd\cd xampp\mysql\binmysql u root

after typing the syntax there will bea Welcome to MySQLmonitor..notification as seen at

left.

SQL syntax

Creating a database Syntax My sample

Using the database Syntax

Now you can use your created database.

Creating table Syntax

create database

database_name;create database csc130;

use database_name; use csc130;

create table table_name (field1,

field2 and so on, primary

key(field));

create table student (idno char(10), fullname

char(50),course char(30), primary key (idno));

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Inserting information into the table

Selecting the table

The output is displaying the information of the student

Order by Syntax

The output is displaying the student information starting the namefrom A-Z.

Adding Field

The student information add other attribute the email. Now the

attribute are idno, fullname, course, email.

Communication with a Mysql backend via the PHP

insert into table_name (field1, field2 ,

.)values(value1,value2,);

insert into student (idno, fullname, course

,.)values(001,Kim T. Calipes,BSIT);

select * from table_name;select * from student;

select * from table_name order by

name ;select * from student order by name ;

Alter table table_name add

field_name value ;

Alter table student add email value

char(30);

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Connecting to the Database

Before you can connect to the database, you need four things: Database name Host Server name Username Password

Connect to the database using the following command (in PHP):$connection = mysql_connect(servername, username, password);

You then need to select the appropriate database by using the following command(in PHP):

Accessing the Database

MySQL commands are inserted within your PHP code to access the database in thisway:

//your information has now been updated

Inserting/Adding Information to your table

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Database Design Concepts

Click the link below..