MySQL Select

The SELECT statement is used to select data from a database.

Select Data From a Database Table

The SELECT statement is used to select data from a database.

Syntax

SELECT column_name(s) FROM table_name

Note: SQL statements are not case sensitive. SELECT is the same as select.

To get PHP to execute the statement above we must use the mysql_query() function. This function is used to send a query or command to a MySQL connection.

Example

The following example selects all the data stored in the "Person" table (The * character selects all of the data in the table):

<?php

$con = mysql_connect("localhost","peter","abc123");

if (!$con)

  {

  die('Could not connect: ' . mysql_error());

  }

  mysql_select_db("my_db", $con);

  $result = mysql_query("SELECT * FROM person");

  while($row = mysql_fetch_array($result))

  {

  echo $row['FirstName'] . " " . $row['LastName'];

  echo "<br />";

  }

  mysql_close($con);

?> 

The example above stores the data returned by the mysql_query() function in the $result variable. Next, we use the mysql_fetch_array() function to return the first row from the recordset as an array. Each subsequent call to mysql_fetch_array() returns the next row in the recordset. The while loop loops through all the records in the recordset. To print the value of each row, we use the PHP $row variable ($row['FirstName'] and $row['LastName']).

The output of the code above will be:

Nancy Varghese

Bill Gates

Display the Result in an HTML Table

The following example selects the same data as the example above, but will display the data in an HTML table:

<?php

$con = mysql_connect("localhost","peter","abc123");

if (!$con)

  {

  die('Could not connect: ' . mysql_error());

  }


mysql_select_db("my_db", $con);


$result = mysql_query("SELECT * FROM person");


echo "<table border='1'>

<tr>

<th>Firstname</th>

<th>Lastname</th>

</tr>";

while($row = mysql_fetch_array($result))

  {

  echo "<tr>";

  echo "<td>" . $row['FirstName'] . "</td>";

  echo "<td>" . $row['LastName'] . "</td>";

  echo "</tr>";

  }

echo "</table>";

mysql_close($con);

?> 

The output of the code above will be: