SQL Select，每分钟只有一条记录

Question

I have SQL select in PHP like this one:

$sql_GATE  = $conn->query("SELECT  * FROM GATE WHERE st='ff0000' and dataGate between '2018-06-27 00:00:0' and '2018-06-27 23:59:0' order by id desc ");

this code return to me aboute 120000 record like example:

1-ff0000-->2018-06-27 18:28:51<br>
2-ff0000-->2018-06-27 18:28:51<br>
3-ff0000-->2018-06-27 18:28:51<br>
13-ff0000-->2018-06-27 18:28:49 .......

How to write SQL request to return only one record per every 1 minutes or 2 minutes? because in one second is aboute 3 records

Answer 1

Here we have syntax and example:

SELECT col1, col2, col3, colN, MAX(TimeAndDateColumn)
FROM table
GROUP BY DATE(TameAndDateColumn), HOUR(TimeAndDateColumn), Minute(TimeAndDateColumn)

Example:

SELECT id, latitute, longitude, speed, MAX(`time`)
FROM YourTableName
GROUP BY DATE(`time`), HOUR(`time`), Minute(`time`)