• php
  • 1812
  • 20/3/2008
  • The SELECT statement is used to select data from a database. -------------------------------------------------------------------------------- [color=FA0309]Select Data From a Database Table[/color]
    The SELECT statement is used to select data from a database. [color=FA0309]Syntax[/color]
    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. [color=FA0309]Example[/color]
    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:
    Peter Griffin
    Glenn Quagmire
    -------------------------------------------------------------------------------- [color=FA0309]Display the Result in an HTML Table[/color]
    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: Firstname Lastname
    Glenn Quagmire
    Peter Griffin
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