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Schareina
Starting Member

4 Posts
Posted - 01/21/2013 :  08:44:24  Show Profile  Reply with Quote
Hello everyone, I'm again with one for spectacular statemten.

I must connect two or more search result in three combinations:
  • First combination is each search-term in one whole projekt.
  • Second combination is each search-term by one worker.
  • Third combination is any searchterm.


The second combination is very hard to combine for me.


INPUT: two or more result tables.

Table: searchTag2 AS t2
project_id				worker_id				s_time
-------------------------------------------------------------------------------------------
0xc80a7036cda94f6498b6d17e45fab3dd	0x857f3f4f9e0142309125fdb6de13651a	16.0
0xe47fd99d0abb45c5b636e4745a1fcd0c	0x857f3f4f9e0142309125fdb6de13651a	24.0
0xe47fd99d0abb45c5b636e4745a1fcd0c	0x857f3f4f9e0142309125fdb6de13651a	24.0
0x84034a9b157a4b538712331e772e881b	0x857f3f4f9e0142309125fdb6de13651a	8.4
0xe47fd99d0abb45c5b636e4745a1fcd0c	0x857f3f4f9e0142309125fdb6de13651a	5.0
0xe47fd99d0abb45c5b636e4745a1fcd0c	0x857f3f4f9e0142309125fdb6de13651a	5.0
0xe47fd99d0abb45c5b636e4745a1fcd0c	0x857f3f4f9e0142309125fdb6de13651a	5.0
0x59dce970d30247b2806e0a68921c302f	0x857f3f4f9e0142309125fdb6de13651a	1.0
0x59dce970d30247b2806e0a68921c302f	0x857f3f4f9e0142309125fdb6de13651a	1.0


Table: searchTag1 AS t1
project_id				worker_id				s_time
-------------------------------------------------------------------------------------------
0x2885ba10a8cc499fa2f22d2c0b1968ea	0xf6559dd8d13f44f8951b831a0f075790	5.0
0x3f8c12411fdb4a03b6e3d7b5bfb3af02	0xf6559dd8d13f44f8951b831a0f075790	5.0
0xc80a7036cda94f6498b6d17e45fab3dd	0x857f3f4f9e0142309125fdb6de13651a	16.0
0xe47fd99d0abb45c5b636e4745a1fcd0c	0x857f3f4f9e0142309125fdb6de13651a	24.0
0x84034a9b157a4b538712331e772e881b	0x857f3f4f9e0142309125fdb6de13651a	8.4
0x928a3fb11e2e46d89f0bb755bc5c1bee	0x857f3f4f9e0142309125fdb6de13651a	5.0
0x8ae8d231375343f39f267f548b8df64e	0x857f3f4f9e0142309125fdb6de13651a	1.0
0x59dce970d30247b2806e0a68921c302f	0x857f3f4f9e0142309125fdb6de13651a	1.0




OUTPUT: The timespan sum without double rows (like distinct), but from both tables. The worker_id = '0xf6559dd8d13f44f8951b831a0f075790' should't appear in the result table - cause he isn't in bothe tables.
Table: resultVector1 AS rv1
worker_id				s_time_span
----------------------------------------------------

0xf6559dd8d13f44f8951b831a0f075790	10.0
0x857f3f4f9e0142309125fdb6de13651a	60.4



If one entry is not present in (t1 and t2) result - then don't care about in rv1.


My idea was: Do a full join with T1 and T2 
ON (t1.worker_id = t2.worker_id) WHERE ((t1.project_id IS NULL) OR (t2.project_id IS NULL))
Then combine 
UNION
the JOIN with t1 and t2 
ON (t1.worker_id = t2.worker_id)
To get the the double results just once.


But then he compute the worng sum. Why
Help me, please.
------
Schareina

bitsmed
Constraint Violating Yak Guru

482 Posts
Posted - 01/21/2013 :  13:14:59  Show Profile  Reply with Quote
This might work for you:

select t4.worker_id
      ,sum(t4.s_time)
  from (select t3.worker_id
              ,t3.s_time
          from (select t1.worker_id
                      ,t1.project_id
                      ,t1.s_time
                  from searchtag1 as t1
                 where exists (select *
                                 from searchtag2 as t2
                                where t2.worker_id=t1.worker_id
                              )
                union all
                select t2.worker_id
                      ,t2.project_id
                      ,t2.s_time
                  from searchtag2 as t2
                 where exists (select *
                                 from searchtag1 as t1
                                where t1.worker_id=t2.worker_id
                              )
               ) as t3
         group by t3.worker_id
                 ,t3.project_id
       ) as t4
 group by t4.worker_id

Maybe we can cut away one subselect, like this:

select distinct t3.worker_id
      ,sum(t3.s_time)
  from (select t1.worker_id
              ,t1.project_id
              ,t1.s_time
          from searchtag1 as t1
         where exists (select *
                         from searchtag2 as t2
                        where t2.worker_id=t1.worker_id
                      )
        union all
        select t2.worker_id
              ,t2.project_id
              ,t2.s_time
          from searchtag2 as t2
         where exists (select *
                         from searchtag1 as t1
                        where t1.worker_id=t2.worker_id
                      )
       ) as t3
 group by t3.worker_id
         ,t3.project_id

ps.: syntax error might occur, as my only developement tool right now is notepad :-D
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Schareina
Starting Member

4 Posts
Posted - 01/23/2013 :  06:05:21  Show Profile  Reply with Quote
bitsmed, thank you.

I correct your statement for me and it works perfectly. Yes - one subselect is to much. Pretty cool

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