PHP MySQL order by keyword

ORDER BY key word

ORDER BY Keywords are used to sort the data in the recordset .

ORDER BY Keywords sort records in ascending order by default .

If you want to sort in descending order , Please use DESC keyword .

grammar

SELECT column_name(s)
FROM table_name
ORDER BY column_name(s) ASC|DESC

To learn more about SQL Knowledge , Please visit our  SQL course .

example

The following example selects "Persons" All the data stored in the table , And according to "Age" Column to sort the results ：

<?php
$con=mysqli_connect("localhost","username","password","database");
//  Detection connection 
if (mysqli_connect_errno())
{
    echo " The connection fails : " . mysqli_connect_error();
}

$result = mysqli_query($con,"SELECT * FROM Persons ORDER BY age");

while($row = mysqli_fetch_array($result))
{
    echo $row['FirstName'];
    echo " " . $row['LastName'];
    echo " " . $row['Age'];
    echo "<br>";
}

mysqli_close($con);
?>

The above results will be output ：

Glenn Quagmire 33
Peter Griffin 35

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Sort by two columns

You can sort by multiple columns . When sorting by multiple columns , The second column is used only if the values of the first column are the same ：

SELECT column_name(s)
FROM table_name
ORDER BY column1, column2