Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
2.4k views
in Technique[技术] by (71.8m points)

can i use aggregation function (LAST) in mysql?

can i use aggregation function (LAST) in mysql??
if yes then why give me error for following query::

SELECT `user_id`,last(`value`)
FROM `My_TABLE`
group by `user_id`

ERROR:: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '(value) FROM My_TABLE group by user_id' at line 1

EDIT:: I got answer "last" is not used in MySql. then How to perform it in MySql??

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

No, There is nothing called LAST in mysql

See the list of aggregated function

EDIT

You can perform the same something like this

select f.user_id, f.value
from (
   select  MAX(value) as maxval
   from my_table group by user_id
) as x inner join my_table as f on f.value = x.maxval

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...