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How to get the latest entry in each group

I am trying to get data from my table using a group. using the group works correctly, but I only need to grab the last inserted element of each group, but it doesn't work. my query always returns the first element of each group.

my request

SELECT id,type,userId,performDate,eventId FROM
`user_marker` where  `eventId`='842' and DATE_FORMAT(from_unixtime(performDate),'%Y%c%d')
=DATE_FORMAT(now(),'%Y%c%d') 
 and `visibility`='1'GROUP BY type ORDER BY id DESC
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2 answers


Try



SELECT a.* FROM ( SELECT id,type,userId,performDate,eventId FROM 
`user_marker` where  `eventId`='842' and DATE_FORMAT(from_unixtime(performDate),'%Y%c%d')
=DATE_FORMAT(now(),'%Y%c%d') and `visibility`='1' ORDER BY id DESC ) as a GROUP BY a.type
0


source


You can try as shown below -



SELECT b.id,b.type,b.userId,b.performDate,b.eventId 
FROM user_marker b 
JOIN (SELECT `type`,MAX(performDate) 
FROM user_marker 
WHERE  `eventId`='842' AND DATE(FROM_UNIXTIME(performDate))=CURDATE() AND `visibility`='1' 
GROUP BY `type`) a ON a.type=b.type AND a.performDate=b.performDate 
ORDER BY b.`type`;
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