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Thursday, 18 October 2012

Working With PhpMyAdmin

10:55 pm

Working With PhpMyAdmin

Working With PhpMyAdmin :

 Phpmyadmin is a tool developed in php language for remote DB administration.
Start apache web server and mysql db server.
Open browser and provide the url as
before you can work with db server our application must create a connection to the mysql db server.
1.      Mysql_connect()  :  function is used for connecting to mysql db server using php.
Mysql_connect(DB hostname.username,password);
The above function will return a resource of type mysql link on successful connection with db server and false on failure.

2.      Mysql_close():  function is used for closing the connection with mysql DB server.
Mysql_close(mysql link);

3.      Mysql_error() : is a function used for getting error message assosiated with the previous mysql operation ,if any.

4.      Mysql_errno() : used for getting the error number assosiated with previous db operation ,if any.

5.      Mysql_select_db() : function used for activating a DB present in mysql db server.
Mysql_select_db(database name);

6.      Mysql_query()   : function is used for passing an sql query to the connected mysql db.
Mysql_query(string query);

  <?php
$con = mysql_connect("localhost","root","");
if($con)
{
    $res = mysql_query("create database emp");
    if($res)
    echo "database is created!!!";
else
    echo "database couldnot be created - ".mysql_error (). "--".mysql_errno ();

}
else
    echo "couldnot connect to DB";
?>
OutPut:
database is created!!!

Program to create a table with tha name of emp in employee database?
<?php
$con = mysql_connect("localhost","root","");
mysql_select_db("emp");
$res= mysql_query("create table emp2(empno int(10) primary key,ename varchar(20),sal float(10,2))");

if($res)
    echo "table created!!";
else
    echo "error-".mysql_error ();

mysql_close($con);
?>
OuPut:
table created!!

Program to insert a new record into emp table?
<?php
$con = mysql_connect("localhost", "root", "");
mysql_select_db("emp");
$res= mysql_query("insert into emp2(empno,ename,sal) values(102,'chandu',123.45),(103,'karanam',23.43)");
if($res)
    echo "record inserted-".mysql_affected_rows ();
else
    echo "Error-".mysql_error ();
mysql_close($con);
?>
OutPut:
record inserted-2.

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