To fetch highest row in table

SELECT * FROM `bids` as b where
amount = (select max( amount) from bids where userid = b.userid) and
timestamp = (select max( timestamp) from bids where userid = b.userid)
group by userid

For examples

id userid timestamp amount
1 101 1122334 223
2 102 1222334 323
3 101 1322334 523
4 102 1522334 723
5 101 1622334 283
6 102 1722334 293
7 102 1822334 233
8 102 2222334 203

id userid timestamp amount
1 101 1622334 283
2 102 2222334 203

Comments

SQL_CALC_FOUND_ROWS command fetch row count without limit

select SQL_CALC_FOUND_ROWS from <tablename> where flag = 1 limit 10 and then select found_rows();

Splitting Comma-Separated Values In MySQL

CREATE TABLE numbers (n INT); INSERT INTO numbers VALUES (1), (2), (3), (4), (5), (6), (7), (8), (9), select id, substring_index( substring_index(email_recipients, ',', n), ',', -1 ) as email from dashboards join numbers on char_length(email_recipients) - char_length(replace(email_recipients, ',', '')) >= n - 1 Reference Site : https://www.sisense.com/blog/splitting-comma-separated-values-in-mysql/

Custom Sorting Array List in PHP

<?php $order = array("Z","Srilanka","34", "Canada", "India", "USA"); $array = array( array('id' => 7867867, 'title' => 'USA'), array('id' => 3452342, 'title' => 'India'), array('id' => 1231233, 'title' => 'Srilanka'), array('id' => 5867867, 'title' => 'Z'), ); usort($array, function ($a, $b) use ($order) { $pos_a = array_search($a['title'], $order); $pos_b = array_search($b['title'], $order); return $pos_a - $pos_b; }); print_r($array); ?>

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