MySQL Where
To select only data that matches a specified criteria, add a WHERE clause to the SELECT statement.
Syntax
SELECT column FROM table WHERE column operator value.
The following operators can be used with the WHERE clause:
| 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.
Note: SQL statements are not case sensitive. WHERE is the same as where.
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);
$result = mysql_query("SELECT * FROM person
WHERE FirstName='Nancy'");
while($row = mysql_fetch_array($result))
{
echo $row['FirstName'] . " " . $row['LastName'];
echo "<br />";
}
?>
The output of the code above will be:
Nancy Varghese
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