• php
  • 1878
  • 20-3-2008
    • [L]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:
    Peter Griffin
    
Glenn Quagmire

    --------------------------------------------------------------------------------
    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:
    Firstname Lastname
    Glenn Quagmire
    Peter Griffin [/L]
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