Home | About | Sematext search-lucene.com search-hadoop.com
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB
 Search Hadoop and all its subprojects:

Switch to Threaded View
Hive >> mail # user >> Something wrong with my query to get TOP 3?


Copy link to this message
-
Re: Something wrong with my query to get TOP 3?
Remove pid,time from DISTRIBUTE BY.

On Thu, Jul 19, 2012 at 1:45 PM, comptech geeky <[EMAIL PROTECTED]>wrote:

> Modified Query that I wrote and its not working as expected output is.
>
> *
> *
> *SELECT bid, pid, rank(bid), time, UNIX_TIMESTAMP(time)*
> *FROM (*
> *    SELECT bid, pid, time*
> *    FROM table1*
> * where to_date(from_unixtime(cast(UNIX_TIMESTAMP(time) as int))) > '2012-07-09'*
> *    DISTRIBUTE BY bid,pid,time*
> *    SORT BY bid, time desc*
> *) a*
> *WHERE rank(bid) < 3;*
>
>
>
>
>
> On Thu, Jul 19, 2012 at 1:41 PM, comptech geeky <[EMAIL PROTECTED]>wrote:
>
>> I wrote this query after modifying it-
>>
>> *SELECT buyer_id, item_id, rank(buyer_id), created_time,
>> UNIX_TIMESTAMP(created_time)*
>> *FROM (*
>> *    SELECT buyer_id, item_id, created_time*
>> *    FROM testingtable1*
>> * where to_date(from_unixtime(cast(UNIX_TIMESTAMP(created_time) as
>> int))) = '2012-07-09'*
>> *    DISTRIBUTE BY buyer_id,item_id*
>> *    SORT BY buyer_id, created_time desc*
>> *) a*
>> *WHERE rank(buyer_id) < 3;*
>>
>> And the output I got is which is sligtly wrong as it is missing two rows-
>>
>> *1345653    330760137950       2012-07-09 21:43:29*
>> *1345653    330760137950       2012-07-09 21:42:29*
>> *1345653    330760137950       2012-07-09 21:41:29*
>>
>> These two rows are missing-
>>
>> 1345653    110909316904       2012-07-09 21:29:06
>> 1345653    221065796761       2012-07-09 19:31:48
>>
>>  So full output should be like this-
>>
>> *1345653    330760137950       2012-07-09 21:43:29*
>> *1345653    330760137950       2012-07-09 21:42:29*
>> *1345653    330760137950       2012-07-09 21:41:29*
>> 1345653    110909316904       2012-07-09 21:29:06
>> 1345653    221065796761       2012-07-09 19:31:48
>>
>>
>> On Thu, Jul 19, 2012 at 1:29 PM, comptech geeky <[EMAIL PROTECTED]>wrote:
>>
>>> Can you show me the exact query that I need to do for this particular
>>> problem consideing my scenario? It will be of great help to me. As I am new
>>> to HiveQL.
>>>
>>> I need TOP 3 for those if BID and PID gets matched but with different
>>> timestamp.
>>>
>>>
>>>
>>> On Thu, Jul 19, 2012 at 1:15 PM, Philip Tromans <
>>> [EMAIL PROTECTED]> wrote:
>>>
>>>> Your rank() is being evaluated map side. Put your distribute by and
>>>> sort by in an inner query, and then evaluate your rank() in an outer query.
>>>>
>>>> Phil.
>>>> On Jul 19, 2012 9:00 PM, "comptech geeky" <[EMAIL PROTECTED]>
>>>> wrote:
>>>>
>>>>> This is the below data in my Table1
>>>>>
>>>>>
>>>>> BID       PID                       TIME
>>>>>
>>>>> --------------+-------------------------+--------------------------------
>>>>> 1345653   330760137950       2012-07-09 21:42:29
>>>>> 1345653   330760137950       2012-07-09 21:43:29
>>>>> 1345653   330760137950       2012-07-09 21:40:29
>>>>> 1345653   330760137950       2012-07-09 21:41:29
>>>>> 1345653   110909316904       2012-07-09 21:29:06
>>>>> 1345653   221065796761       2012-07-09 19:31:48
>>>>>
>>>>> So If I need to clarify the above scenario- I have data in above table
>>>>> like this-
>>>>> For USER *`1345653` *I have this PID `*330760137950` *four times but
>>>>> with different timestamps in red color. So I need the output something like
>>>>> this-
>>>>>
>>>>> Output that I need:-
>>>>>
>>>>> *1345653    330760137950       2012-07-09 21:43:29 *
>>>>> *1345653    330760137950       2012-07-09 21:42:29 *
>>>>> *1345653    330760137950       2012-07-09 21:41:29*
>>>>> 1345653    110909316904       2012-07-09 21:29:06
>>>>> 1345653    221065796761       2012-07-09 19:31:48
>>>>>
>>>>> So Basically If BID and PID are same but with different timestamps,
>>>>> then I need TOP 3 sorted with TIME in descending order
>>>>>
>>>>> And for this I created rank UDF (User Defined Function). And I wrote
>>>>> the below query but its not working for me. Can anyone help me on this?
>>>>> *
>>>>> *
>>>>> *
>>>>> *
>>>>> *SELECT buyer_id, item_id, created_time*
>>>>> *    FROM table1*
>>>>> * where to_date(from_unixtime(cast(UNIX_TIMESTAMP(created_time) as
NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB