Comments on: PHP-MySql: Select previous row and next row from current ID

By: deepak

deepak — Tue, 31 Jan 2012 09:03:13 +0000

for anchor tag, what code code i used to disable the already exist anchor in php when all record empty in database

By: Jesús Cepeda Cid

Jesús Cepeda Cid — Thu, 12 Jan 2012 20:44:09 +0000

After a couple of hours with a BACK NEXT problem to show results on a particular query you gave me the cleanest solution ever.
Tons of thanks

By: Mike

Mike — Tue, 03 Jan 2012 15:22:02 +0000

Some thing happened to the less-than symbol:

the second WHERE should be:

WHERE time <

By: Mike

Mike — Tue, 03 Jan 2012 15:15:09 +0000

SELECT id
FROM posts
WHERE time = (SELECT MIN(time)
FROM posts
WHERE time >
(SELECT time
FROM posts
WHERE id = $id))

By: Mike

Mike — Tue, 03 Jan 2012 15:14:25 +0000

With one query that returns three values (or two if its the last row): last, current and next. It only fails if the value of id is the first row. If you get an empty return value, just execute the following to get the id of the second row:

(see next post)

By: Mike

Mike — Tue, 03 Jan 2012 15:13:27 +0000

That chopped off the rest of the query. Here’s the rest:

ORDER BY time ASC
LIMIT 3

By: Mike

Mike — Tue, 03 Jan 2012 15:11:50 +0000

Here’s what I came up with for ordering by a separate field (time):

SELECT id
FROM posts
WHERE time >= (SELECT MAX(time)
FROM posts
WHERE time
(SELECT time
FROM posts
WHERE id = $id))

By: Mike

Mike — Tue, 03 Jan 2012 13:50:30 +0000

Unfortunately that’s not true. If you order by time, for instance, the id may be less than the given id while the time could be greater. I believe a subquery would be necessary.

By: Mohey

Mohey — Mon, 02 Jan 2012 13:54:33 +0000

thnx

By: Agustín Amenabar

Agustín Amenabar — Sun, 06 Nov 2011 20:59:38 +0000

BRRILLIANT!!! you sir saved me hours.

By: Bade Lal Verma

Bade Lal Verma — Tue, 27 Sep 2011 13:45:00 +0000

// Prev id
$sql2 = “SELECT * FROM user_login WHERE id 0) {
$prevrow = mysql_fetch_assoc($result2);
// echo ”. print_r($prevrow,true) . ”;
$previd=$prevrow['id'];
// echo “Prev = “.$previd.”";
}

// Next id
$sql1 = “SELECT * FROM user_login WHERE id > {$curid} LIMIT 1″;

$result1 = mysql_query($sql1);
if (mysql_num_rows($result1)>0) {
$nextrow = mysql_fetch_assoc($result1);
// echo ”. print_r($nextrow,true) . ”;
$nextid=$nextrow['id'];
// echo “Next = “.$nextid.”";
}

By: Bade Lal Verma

Bade Lal Verma — Tue, 27 Sep 2011 13:40:58 +0000

Following is a complete code for displaying Current Record With Previous, Next Record button

0) {

$info = mysql_fetch_assoc($result);
} else {
die(‘Not found’);
}

// Next id
$sql1 = “SELECT * FROM user_login WHERE id > {$curid} LIMIT 1″;

} else {
// No form has been submitted so use the lowest id and grab its info
$sql = “SELECT id,username,password FROM user_login WHERE id > 0″;

$result = mysql_query($sql);
if (mysql_num_rows($result)>0) {

$info = mysql_fetch_assoc($result);

$sql1 = “SELECT * FROM user_login WHERE id > {$info['id']} LIMIT 1″;

$result1 = mysql_query($sql1);
if (mysql_num_rows($result1)>0) {
$nextrow = mysql_fetch_assoc($result1);
$nextid=$nextrow['id'];
}
}
}
if (isset($info)) {
$content = ”.print_r($info,true).”;

} else {
$content = ‘Nothing in the db ‘;
}
?>

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