PHP MySQL The Where Clause
To select only data
that matches a specified criteria, add a WHERE clause to the SELECT statement.
The WHERE clause
To select only data
that matches a specific criteria, add a WHERE clause to the SELECT statement.
Syntax
SELECT column FROM table
WHERE column operator value
|
Operator
|
Description
|
=
|
Equal
|
!=
|
Not equal
|
>
|
Greater than
|
<
|
Less than
|
>=
|
Greater than or equal
|
<=
|
Less than or equal
|
BETWEEN
|
Between an inclusive range
|
LIKE
|
Search for a pattern
|
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
will select all rows from the "Person" table, where
FirstName='Peter':<?php
$con = mysql_connect("localhost","peter","abc123");
if (!$con)
{
die('Could not connect: ' . mysql_error());
}
mysql_select_db("my_db", $con);
$result = mysql_query("SELECT * FROM person
WHERE FirstName='Peter'");
while($row = mysql_fetch_array($result))
{
echo $row['FirstName'] . " " . $row['LastName'];
echo "<br />";
}
?>
|
Peter Griffin
|
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