php-mysql如何在mysql中选择特定的行号？

Question

I am new at this and learning the code. I want to create the php code which select the particular row. say 5th row or 6th row any row. I create the code like this

<?php
$servername = "localhost";
$username = "test1";
$password = "pass";
$dbname = "test1";

// Create connection
$conn = new mysqli($servername, $username, $password, $dbname);
// Check connection
if ($conn->connect_error) {
    die("Connection failed: " . $conn->connect_error);
} 

$sql = "SELECT FIELD1, FIELD2 FROM mytable ";
$result = $conn->query($sql);

if ($result->num_rows > 0)


 {
    // output data of each row
    while($row = $result->fetch_assoc()) {
        echo "id: " . $row["FIELD1"]. " - Name: " . $row["FIELD2"]. " <br>";
    }



} else 
{
    echo "0 results";
}
$conn->close();
?>

THis code works fine but it give the all data of the table.I want to just select particular row number data.how to do this??

Answer 1

You can do it with the LIMIT statement, say LIMIT 3,1 to select the 4th row. First number is the starting row, second number is the count of rows to select.

$sql = "SELECT FIELD1, FIELD2 FROM mytable LIMIT $row_index, 1";

will give you row $row_index + 1

Answer 2

您可以在查询中使用WHERE条件作为SELECT FIELD1, FIELD2 FROM mytable WHERE id = 1 。