And btw does group by works in hive because the same wuery i am running in mysql and its working fine but its failing in hive
select name from users_info group by country; in mysql its working but whn i try to run it in hive its telling hive> select name from users_info group by country; FAILED: Error in semantic analysis: Line 1:7 Expression not in GROUP BY key 'name' I wanna know why is it failing On Wed, Jun 27, 2012 at 10:19 AM, Soham Sardar <sohamsardart...@gmail.com> wrote: > See Bejoy and Everyone , > I have two tables > one users_info and one users_audit > in hive .. > > hive> desc users_audit; > OK > id int > userid int > logtime string > > hive> desc users_info; > OK > id int > name string > age int > country string > gender string > bday string > > now i have given the description of the tables in hive > > my goal is to find: > the maximum number of users loging - in at between a certain time > frame say 1PM to 2PM- belonging to a specific country > > for example > in between 1PM to 2PM there are 10000 users loging into and 5500 are > from africa , then i need to print the names of all the users who are > logged in between the time stamp and who are from africa .. > the logtime in the users_audit table gives the login time and the > names and country are from the users_info table . > > Can someone help me out with this . I am a new user in hive so would > like some ones help !!!!!! > Thanks in advance!! :) > > > > On Tue, Jun 26, 2012 at 6:53 PM, Bejoy Ks <bejoy...@yahoo.com> wrote: >> >> >> Hi Soham >> >> Hive Supports pretty much all the primitive data types including INT. For a >> detaild list please refer >> https://cwiki.apache.org/confluence/display/Hive/Tutorial#Tutorial-PrimitiveTypes >> >> The only draw back as in common is when you have the data type as String you >> cannot use it directly on Mathematical functions. >> >> Your requirement can easily be satisfied with a few date functions on String >> data itself. >> >> Regards >> Bejoy KS >> >> >> ________________________________ >> From: Soham Sardar <sohamsardart...@gmail.com> >> To: user@hive.apache.org; user <u...@sqoop.apache.org> >> Sent: Tuesday, June 26, 2012 2:23 PM >> Subject: date datatype in hive >> >> I have a native data type in mysql and i just imported it into hive >> and the data type of the column has now become string .. >> Now i would like to know if there is any native data type in hive and >> What are the pros and cons of using string type in hive rather than >> (int)(thats what i expect ) type >> >> And with the string type can i just run any type of queries like >> print the names of the person which has the maximum number of users >> between 1 PM and 3 PM >> >> and the table should have just name int(5) and login time (datetime ) >> {as per the mysql syntax}
