PhpMyAdmin
What is PhpMyAdmin?

PhpMyAdmin is one of the most popular applications for MySQL databases
management. It is a free tool written in PHP. Through this software you can create,
alter, drop, delete, import and export MySQL database tables. You can run MySQL
queries, optimize, repair and check tables, change collation and execute other
database management commands.
PhpMyAdmin Features

The main PhpMyAdmin features are as follows:

User-friendly web interface;

Support for most MySQL functions like browse, drop, create, copy and alter databases, tables, views, fields and
indexes, execute MySQL queries, manage stored procedures and functions;

Import data from CSV and SQL files;

Export data to various formats: CSV, SQL, XML, PDF, ISO/IEC 26300 - OpenDocument Text and Spreadsheet,
Word, Excel, LATEX and others;


Searching globally in a database or a subset of it;

And much more.
The full list of the PhpMyAdmin features can be found in the official web site.
How to install PhpMyAdmin ?

by Xampp Application the PhpMyAdmin installation .

Or you can install PhpMyAdmin from website and add it into your server as
Apache server .
PhpMyAdmin administration

In the following pages of our PhpMyAdmin Tutorial we will describe
the functionality of the software, integrated in your server.

Once you enter your PhpMyAdmin application, you will see different
areas.
PhpMyAdmin administration
PhpMyAdmin administration

In the upper part you will find the server hostname. The databases which you will
manage are stored on the same server as the software and the hostname is:
localhost.

Under it there is information regarding the MySQL server, the MySQL client and
the PhpMyAdmin version.

Next, you will see the MySQL charset and you will be able to define the MySQL
connection collation.

In the right column you can change the default language, alter the style, customize
the theme color and the font size. Also there you will notice links to PhpMyAdmin
resources.
PhpMyAdmin administration

The main PhpMyAdmin areas are as follows:
1)
Databases
2)
Status
3)
Variables
4)
Processes
5)
Charsets
6)
Engines
7)
Export
8)
Import
Databases area

In the Databases tab you will find a list with all the databases which can be
managed through the localhost server .

Once you click on a chosen database, you can start its management.
Status area

You can open the Status tab by clicking on the Show MySQL runtime
information link. There you will find detailed information regarding the
MySQL server since the last restart.

You will see the traffic handled by the MySQL server, the maximum number
of simultaneous connections, the total number of connections, the failed and
the aborted attempts, the total number of queries sent to the server and
more related details.
Status area
Variables area

The Variables tab will be opened after clicking on the Show MySQL system
variables link.

You will see a list with the MySQL server system variables and their values.
Processes area

By clicking on the Processes link you will see all the processes running
by your localhost server.
Charsets area

The Character Sets and Collations link leads to the Charset area. There you
will find all the charsets and collations supported by the MySQL server.
Engines area

The Storage Engines link opens a list with all the engines supported by the
MySQL server. The default one is MyISAM. Another popular storage engine,
used by many databases is InnoDB. More about the MySQL storage engines
can be found in the official documentation.
Export area

In the Export section you can export your database tables content in
different formats (CSV, SQL, PDF, Microsoft Excel, Microsoft Word, XML, and
many more). You can select all the database tables or just pick some of them.
Export area

You can add custom comments in the header of the exported content.
You can decide whether to export just the database structure, the
data or both of them. You can export the database tables in a file
and compress it or you can visualize the queries directly on the
screen.
Import area

In the Import section you can import your database tables from a file, saved on your
local computer.

You should browse for the file and pick its character set from the drop-down menu.

If the file is too big, the MySQL server timeout can be reached. In such a case you can
interrupt the import action. Then you can continue with the data import defining the
number of the queries to be skipped from the file beginning. In this way you will skip
the imported queries and continue from the point of the interruption.

Additionally you can pick the SQL server mode of the imported file. You can find more
details in the Server SQL Modesdocumentation.
Import area
Manage MySQL database tables with PhpMyAdmin ?

The main functionality of the PhpMyAdmin tool is to manage your databases.

Click on the Databases link. Pick the preferred database which you want to
manage and click on its name.
Manage MySQL database tables with PhpMyAdmin ?

In the new screen you will see a list with the database tables, the allowed
actions with them, the number of the records, the storage engine, the
collation, the tables' sizes and the overhead.
Manage MySQL database tables with PhpMyAdmin ?

The possible actions which you can perform to a chosen table are:
1.
Browse
2.
Structure
3.
Search
4.
Insert
5.
Empty
6.
Drop
Browse Database Tables

Only the tables with existing records can be browsed. Once you click
on the Browse icon a new window with the records list will be
opened.
Browse Database Tables

By clicking on the Pen icon you can edit the chosen record.

You will see the record structure and you can alter the values of the
records.
Structure Database Tables

The next option is named Structure. In the Structure screen you will
see the database's table structure.
Structure Database Tables

You will see the fields' names, their types, collations, attributes, additional extra
information, the default values and whether the fields' values can be NULL. You can
browse for distinct values by clicking on the corresponding action icon. Also, you can
edit a field's structure or delete a field. You can define different indexes: Primary,
Unique, Index and Full text. More about the indexes can be found in the MySQL
Indexes documentation.

In the Indexes area you will find the indexes assigned for the table and the fields for
which they are set. You can edit and delete them.

Additionally, in the same screen you can check the Space Usage and the Row
Statistics.
Search Database Tables

Through the Search action you can generate a search query for the
chosen table.
Search Database Tables

You can either write the WHERE clause or you can use the "query by
example" functionality. You should click on the Gobutton to execute the
query.

For example, if you want to visualize all the records with a field value
that starts with a you should select the fields which you want to show. Pick
the LIKE operator from the drop-down menu and enter in the
corresponding field value a% (% stands for a wildcard string). Click on
the Go button to see the result.
Insert into Database Tables

Using the Insert action you can insert records in your database table.

Once you fill in the corresponding values click on the Go button and the new
record will be inserted.
Empty Database Tables

The Empty action allows you to empty your database table, removing
the data and keeping the empty table.
Drop Database Tables

Through the Drop action you can delete the whole table and all the
records stored in it.
Create a MySQL Database?

Enter the database name in the text field and click on
the Create button.
Add MySQL Database Tables

Navigate to your PhpMyAdmin tool and open the newly create
database. It is empty and there are no tables.

Enter the table name and the number of fields. Click on the Go button
to create the table.
Add MySQL Database Tables

On the next screen you should enter the fields' names and the corresponding
properties. The properties are:

Type

Here you should pick the type of the data, which will be stored in the
corresponding field. More details about the possible choices can be found in the
official MySQL Data Types documentation.

Length/Values

Here you should enter the length of the field. If the field type is "enum" or "set",
enter the values using the following format: 'a','b','c'...
Add MySQL Database Tables

Collation


Pick the data collation for each of the fields.
Attributes

The possible attributes' choices are:

BINARY - the collation for the field will be binary, for example utf8_bin;

UNSIGNED - the field numeric values will be positive or 0;

UNSIGNED ZEROFILL - the field numeric values will be positive or 0 and leading
zeros will be added to a number;

ON UPDATE CURRENT_TIMESTAMP - the value for a data type field has the
current timestamp as its default value, and is automatically updated;
Add MySQL Database Tables

Null

Here you define whether the field value can be NULL. More about the NULL value can be found in the
corresponding MySQL documentation.

Default


This property allows you to set the default value for the field.
Extra

In the Extra property you can define whether the field value is auto-increment.

The radio buttons that come below define whether there is an Index defined for the particular field and
specify the Indextype.

Comments

Here you can add comments, which will be included in the database sql code.

At the end you can include Table comments and pick the MySQL Storage Engine and the Collation. Once you
are ready, click on the Save button.
Add MySQL Database Tables
Add MySQL Database Tables
If you want to add more fields you should specify their number and click on

the Go button instead of Save.
The database table will be created and you will see the corresponding MySQL query.


Now we will proceed with the populating of the table with data.
Add Content in a Database Table

In order to add records in a database table click on the Insert tab.

Enter the data in the corresponding fields and click on the Go button to store it.

At the bottom of the page you will see a drop-down menu labelled Restart insertion with x rows .
There you can pick the number of the rows that you can populate with data and insert at once. By
default the value is 2.

The Ignore check box will allow you to ignore the data entered below it. It will not be added.
Add Content in a Database Table

You can see the newly inserted record by clicking on the Browse tab.

You can edit or delete the record by clicking on the corresponding icons.

To insert more records, return to the Insert tab and repeat the procedure.
Backup a Database

Once you are ready, you can create a backup of your database through
the Export tab.

Select the tables which you want to be exported.

Leave the radio button selection to the SQL option. The Structure and
the Data check boxes should remain checked.

Select the Save as file check box and then click on the Go button.

In this way you will save the dump SQL file with your database structure and
content on your local computer.
Backup a Database
Restore a Database Backup

You can restore your database backup from the Import tab.

lick on the Browse button to select your database backup file from your local
computer.

Pick the charset of the file from the corresponding drop-down menu.

If the file is too big, the MySQL server timeout can be reached. In such a
case you can interrupt the import action. Then you can continue with the data
import defining the number of the queries to be skipped from the file
beginning. In this way you will skip the imported queries and continue from
the point of the interruption.
Restore a Database Backup
Run MySQL Query

The one for advanced users is through the SQL tab. There you should enter
the entire SQL query code and click on the Gobutton to execute it.
Run MySQL Query

The other option is to construct a MySQL query in the Query tab.
Run MySQL Query

There you can define different search conditions, sort the results and query multiple
tables.

You should select the tables used in the query from the Use Tables list.

The fields which will be included in the SELECT MySQL statement should be picked
from the Field drop-down menus. TheShow check box should be selected.

In the Criteria text field you should enter the criteria according to which the search will
be completed.

Through the Sort drop-down menu you can visualize the result sorted in an ascending
or a descending order.

The text window located below allows you do add extra search conditions.
Run MySQL Query

Additionally, you can use the Ins and the Del check boxes to add or delete text rows for search
conditions. The same can be performed through the Add/Delete Criteria Row drop-down menu. To
add or delete columns use the corresponding Insand Del check boxes or the Add/Delete Field
Columns drop-down menu.

In the Modify section you can define the relations between the fields (whether they are connected
through the AND or theOR logical operators).

You need to click on the Update Query button to complete the modifications.

To run the query click on the Submit Query button.

The query which we have included in our example is:

SELECT `AT_admins` . * FROM AT_admins WHERE (`AT_admins`.`login` LIKE "a%");

It shows all the records from the AT_admins table for which the login field starts with "a".
MySQL
MySQL

With PHP, you can connect to and manipulate databases.

MySQL is the most popular database system used with PHP.

PHP combined with MySQL are cross-platform (you can develop in Windows
and serve on a Unix platform)
What is MySQL?

MySQL is a database system used on the web

MySQL is a database system that runs on a server

MySQL is ideal for both small and large applications

MySQL is very fast, reliable, and easy to use

MySQL supports standard SQL

MySQL compiles on a number of platforms

MySQL is free to download and use

MySQL is developed, distributed, and supported by Oracle Corporation

MySQL is named after co-founder Monty Widenius's daughter: My
What is MySQL?

The data in MySQL is stored in tables. A table is a collection of related data, and it
consists of columns and rows.

Databases are useful when storing information categorically. A company may have a
database with the following tables:
•
Employees
•
Products
•
Customers
•
Orders
Queries

A query is a question or a request.

We can query a database for specific information and have a recordset returned.

Look at the following query (using standard SQL):
SELECT LastName FROM Employees

The query above selects all the data in the "LastName" column from the "Employees"
table.
PHP Connect to the MySQL Server

Three steps to connect to the MySql server :
•
Open a Connection to the MySQL Server
•
manipulation in MySql server
•
Close a Connection
Open a Connection to the MySQL Server
mysqli_connect(host,username,password,dbname);

Before we can access data in a database, we must open a connection
to the MySQL server.
Parameter
Description
host
Optional. Either a host name or an IP address
username
Optional. The MySQL user name
password
Optional. The password to log in with
dbname
Optional. The default database to be used when
performing queries
Open a Connection to the MySQL Server
<?php
// Create connection
$con=mysqli_connect(“localhost",“root","23","my_db");
// Check connection
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
?>
Close a Connection
mysqli_close(connection_name)

The connection will be closed automatically when the script ends. To
close the connection before, use the mysqli_close() function:
Close a Connection
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno($con))
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_close($con);
?>
Create a Database

The CREATE DATABASE statement is used to create a database table
in MySQL.

We must add the CREATE DATABASE statement to the mysqli_query()
function to execute the command.

The following example creates a database named "my_db":
Create a Database
<?php
$con=mysqli_connect("example.com","peter","abc123");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Create database
$sql="CREATE DATABASE my_db";
if (mysqli_query($con,$sql))
{
echo "Database my_db created successfully";
}
else
{
echo "Error creating database: " . mysqli_error();
}
?>
Create a Table

The CREATE TABLE statement is used to create a table in MySQL.

We must add the CREATE TABLE statement to the mysqli_query()
function to execute the command.

The following example creates a table named "Persons", with three
columns. The column names will be "Firstname", "Lastname" and
"Age":
Create a Table
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
// Create table
$sql="CREATE TABLE persons(Firstname CHAR(30),Lastname CHAR(30),Age INT)";
// Execute query
if (mysqli_query($con,$sql))
{
echo "Table persons created successfully";
}
else
{
echo "Error creating table: " . mysqli_error();
}
?>
Primary Keys and Auto Increment Fields

ach table in a database should have a primary key field.

A primary key is used to uniquely identify the rows in a table. Each primary
key value must be unique within the table. Furthermore, the primary key field
cannot be null because the database engine requires a value to locate the
record.

The following example sets the PID field as the primary key field. The
primary key field is often an ID number, and is often used with the
AUTO_INCREMENT setting. AUTO_INCREMENT automatically increases the
value of the field by 1 each time a new record is added. To ensure that the
primary key field cannot be null, we must add the NOT NULL setting to the
field:
Primary Keys and Auto Increment Fields
$sql = "CREATE TABLE Persons
(
PID INT NOT NULL AUTO_INCREMENT,
PRIMARY KEY(PID),
Firstname CHAR(15),
Lastname CHAR(15),
Age INT
)";
Insert Data Into a Database Table

The INSERT INTO statement is used to add new records to a
database table.

Syntax

It is possible to write the INSERT INTO statement in two forms.
Insert Data Into a Database Table

The first form doesn't specify the column names where the data will
be inserted, only their values:
INSERT INTO table_name VALUES (value1, value2, value3,...)

The second form specifies both the column names and the values to be
inserted:
INSERT INTO table_name (column1, column2, column3,...)
VALUES (value1, value2, value3,...)
Insert Data Into a Database Table
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_query($con,"INSERT INTO Persons (FirstName, LastName, Age)
VALUES ('Peter', 'Griffin',35)");
mysqli_query($con,"INSERT INTO Persons (FirstName, LastName, Age)
VALUES ('Glenn', 'Quagmire',33)");
mysqli_close($con);
?>
Insert Data From a Form Into a Database

Now we will create an HTML form that can be used to add new
records to the "Persons" table.
html>
<body>
<form action="insert.php" method="post">
Firstname: <input type="text" name="firstname">
Lastname: <input type="text" name="lastname">
Age: <input type="text" name="age">
<input type="submit">
</form>
</body>
</html>
Insert Data From a Form Into a Database

When a user clicks the submit button in the HTML form in the example
above, the form data is sent to "insert.php".

The "insert.php" file connects to a database, and retrieves the values
from the form with the PHP $_POST variables.

Then, the mysqli_query() function executes the INSERT INTO statement,
and a new record will be added to the "Persons" table.
Insert Data From a Form Into a Database

insert.php
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$sql="INSERT INTO Persons (FirstName, LastName, Age)
VALUES
('$_POST[firstname]','$_POST[lastname]','$_POST[age]')";
if (!mysqli_query($con,$sql))
{
die('Error: ' . mysqli_error());
}
echo "1 record added";
mysqli_close($con);
?>
Select Data From a Database Table
SELECT column_name(s) FROM table_name

The SELECT statement is used to select data from a database.
$select_st = “select * from table_name ”;
Execute the SQL statement
recourse mysqli_query(connection_name, sql_statment)

To get PHP to execute the statement above we must use the
mysqli_query() function. This function is used to send a query or
command to a MySQL connection.
Insert Data From a Form Into a Database
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT * FROM Persons");
while($row = mysqli_fetch_array($result))
{
echo $row['FirstName'] . " " . $row['LastName'];
echo "<br />";
}
mysqli_close($con);
?>
The WHERE clause
SELECT column_name(s)
FROM table_name
WHERE column_name operator value

The SELECT statement is used to select data from a database.
The WHERE clause
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT * FROM Persons
WHERE FirstName='Peter'");
while($row = mysqli_fetch_array($result))
{
echo $row['FirstName'] . " " . $row['LastName'];
echo "<br>";
}
?>
The ORDER BY Keyword
SELECT column_name(s)
FROM table_name
ORDER BY column_name(s) ASC|DESC

The ORDER BY keyword is used to sort the data in a recordset.

The ORDER BY keyword sort the records in ascending order by
default.

If you want to sort the records in a descending order, you can use the
DESC keyword.
The ORDER BY Keyword
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
$result = mysqli_query($con,"SELECT * FROM Persons ORDER BY age");
while($row = mysqli_fetch_array($result))
{
echo $row['FirstName'];
echo " " . $row['LastName'];
echo " " . $row['Age'];
echo "<br>";
}
mysqli_close($con);
?>
The ORDER BY Keyword

It is also possible to order by more than one column. When ordering
by more than one column, the second column is only used if the values
in the first column are equal:
Update Data In a Database
UPDATE table_name
SET column1=value, column2=value2,...
WHERE some_column=some_value

The UPDATE statement is used to update existing records in a table.

Note: Notice the WHERE clause in the UPDATE syntax. The WHERE
clause specifies which record or records that should be updated. If
you omit the WHERE clause, all records will be updated!
Update Data In a Database
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_query($con,"UPDATE Persons SET Age=36
WHERE FirstName='Peter' AND LastName='Griffin'");
mysqli_close($con);
?>
Delete Data In a Database
DELETE FROM table_name
WHERE some_column = some_value

The DELETE FROM statement is used to delete records from a
database table.

Note: Notice the WHERE clause in the DELETE syntax. The WHERE
clause specifies which record or records that should be deleted. If you
omit the WHERE clause, all records will be deleted!
Delete Data In a Database
<?php
$con=mysqli_connect("example.com","peter","abc123","my_db");
// Check connection
if (mysqli_connect_errno())
{
echo "Failed to connect to MySQL: " . mysqli_connect_error();
}
mysqli_query($con,"DELETE FROM Persons WHERE LastName='Griffin'");
mysqli_close($con);
?>