MySql select from list the latest connection date for each IP?

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I have a DB that save each login to my server according to the user IP

2018-08-07 00:00:00,

2018-08-06 07:00:00,

2018-08-05 00:22:00,

2018-08-07 00:00:00,

2018-08-05 00:00:00,

and so on.....

I want to know when was the latest connection according to each IP so in the end I see :

2018-08-07 00:00:00,

2018-08-07 00:00:00,

I have try this :

FROM sample.connection
WHERE Time in (SELECT MAX(Time) from sample.connection GROUP BY IP);

but it doesn't work - I don't see the latest connection for all the IP (only some of them)

my IP is varcahr(45)

Time is Datetime

what is wrong ?

Try below query, you need a subquery and join:

SELECT sc.IP,sc.Time
FROM sample.connection sc
    (SELECT IP, MAX(Time) AS lstTime 
     FROM sample.connection 
     GROUP BY IP) t2 ON sc.Time = t2.lstTime AND sc.IP = t2.IP!9/8f1e51/2

IP          Time
--------------------------------    2018-08-07 00:00:00    2018-08-07 00:00:00

Select last record mysql on left join, I have a table that stores all users connections ( date & ip ) and i want to retrieve with a single query all the users data (nickname , avatar ) + the  SELECT d.model,, d.color, d.etc FROM doc d WHERE IN (SELECT max( FROM doc d2 WHERE d2.model=d.model) MySQL 8.0 and newer supports the OVER clause, producing the same results a bit faster for larger data sets.!9/8f1e51/1

SELECT sc.IP, sc.Time
FROM sample.connection sc
LEFT JOIN sample.connection t
ON sc.ip = t.ip
   AND sc.time<t.time

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I must be missing something. Why isn't this a simple SELECT with MAX and GROUP BY?


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  • no - this just give the latest connection for all the IP . I want latest for each IP