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, 10.1.1.1 2018-08-06 07:00:00, 10.1.1.1 2018-08-05 00:22:00, 10.1.1.1 2018-08-07 00:00:00, 10.1.1.5 2018-08-05 00:00:00, 10.1.1.5
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, 10.1.1.5 2018-08-07 00:00:00, 10.1.1.1
I have try this :
SELECT IP,Time 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 INNER JOIN (SELECT IP, MAX(Time) AS lstTime FROM sample.connection GROUP BY IP) t2 ON sc.Time = t2.lstTime AND sc.IP = t2.IP
IP Time -------------------------------- 10.1.1.1 2018-08-07 00:00:00 10.1.1.5 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.date, d.color, d.etc FROM doc d WHERE d.date IN (SELECT max(d2.date) 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.
SELECT sc.IP, sc.Time FROM sample.connection sc LEFT JOIN sample.connection t ON sc.ip = t.ip AND sc.time<t.time WHERE t.ip IS NULL;
MySQL – Grow Help Center, Here are the steps to connect your MySQL database to Grow: the tables inside your database, to see a list of your tables you can select the blue that the IP addresses are not yet whitelisted, or the host, port, database name, Start of last week: SELECT substr(date,1,10) as day, count(*) as total_calls Learn Node.js MySQL SELECT FROM query to access data of a MysQL Table. Node.js MySQL SELECT FROM query. MySQL SELECT Query is used to select some of the records (with some of their properties if required) of a table. In this Node.js Tutorial, we shall learn to access data of a table using following Node.js examples. Example to MySQL SELECT FROM query
I must be missing something. Why isn't this a simple SELECT with MAX and GROUP BY?
SELECT IP, MAX(Time) as Time FROM conn GROUP BY IP;
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- no - this just give the latest connection for all the IP . I want latest for each IP