Where Clause(MYSQL)

In Select Query we use WHERE clause to select only data that matches a specified criteria.

Syntax:

SELECT column(s) FROM tablename WHERE column operator value

Example:

Table Name(empinfo):

FirstName	LastName	Email	DOB
Steve	Martin	smart.steve@studiesinn.com	08-04-1988
David	Fernandas	davidfernandas@studiesinn.com	04-16-1977
Ajay	Rathor	ajayrathor@studiesinn.com	08-24-1986

$con = mysql_connect("localhost:3306","adam","123456");
if (!$con)
{
die('Could not connect: ' . mysql_error());

}

mysql_select_db("mydb", $con);
$result = mysql_query("SELECT * FROM empinfo where FirstName=’David’");
while($row = mysql_fetch_array($result))
{
echo $row['FirstName'] . " " . $row['LastName'] . “ “ $row[‘DOB’];
echo "
";
}
mysql_close($con);
?>

Output will be.

David Fernandas 04-16-1977

Operator that can be used in where clause are as under

= 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