Count all values with a special WHERE clause in a select for a group?

Hello,
I have the following table1:
code, month, value
*1,1,40*
*1,2,50*
*1,3,0*
*1,4,0*
*1,5,20*
*1,6,30*
*1,7,30*
*1,8,30*
*1,9,20*
*1,10,20*
*1,11,0*
*1,12,0*
*2,1,10*
*2,2,10*
*2,3,20*
*2,4,20*
*2,5,20*
*2,6,30*
*2,7,40*
*2,8,50*
*2,9,20*
*2,10,20*
*2,11,20*
*2,12,20*
This is a table with 3 columns, first column is a code, second one is the number of month, third one is a value.
Now I want to select the records for each code. For example all records for code=1.
I want to count how much values=0 for this code=1. After this counting I want to update the value with this count of 0.
For my example:
For code 1 there are 4 fields with value 0. Therefore I want to update all values of code1 to 4.
For the second code=2 there are no value=0. Therefore I want to update the values of code2 to 0.
This should be the result:
code, month, value
*1,1,4*
*1,2,4*
*1,3,4*
*1,4,4*
*1,5,4*
*1,6,4*
*1,7,4*
*1,8,4*
*1,9,4*
*1,10,4*
*1,11,4*
*1,12,4*
*2,1,0*
*2,2,0*
*2,3,0*
*2,4,0*
*2,5,0*
*2,6,0*
*2,7,0*
*2,8,0*
*2,9,0*
*2,10,0*
*2,11,0*
*2,12,0*
My question is:
Is there any possibility in oracle to count in a select (or in a insert/update statement) all values=0 for one group (in this example named CODE) and do an update in the same statement for this group?
Hope anyone can give me a hint if this is possible?
Thanks a lot.
Best regards,
Tim

Here's the select:
SQL> select code, month
2        ,count(decode(value,0,1,null)) over (partition by code) ct
3 from   t
4 order by code, month
5 ;
                CODE                MONTH                   CT
                   1                    1                    4
                   1                    2                    4
                   1                    3                    4
                   1                    4                    4
                   1                    5                    4
                   1                    6                    4
                   1                    7                    4
                   1                    8                    4
                   1                    9                    4
                   1                   10                    4
                   1                   11                    4
                   1                   12                    4
                   2                    1                    0
                   2                    2                    0
                   2                    3                    0
                   2                    4                    0
                   2                    5                    0
                   2                    6                    0
                   2                    7                    0
                   2                    8                    0
                   2                    9                    0
                   2                   10                    0
                   2                   11                    0
                   2                   12                    0

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I have a problem with the performance of the following query:
select /*+ index_asc(omschact oma_index1) */ knr, projnr, actnr from omschact where ((knr = 100 and actnr > 30) or knr > 100)
and rownum = 1;
(rownum used only for test purpose)
index:
create index on omschact (knr, projnr);
Execution plan:
Id Operation
0 SELECT STATEMENT
1 COUNT STOPKEY
2 TABLE ACCESS BY INDEX ROWID
3 INDEX FULL SCAN
If I'm correct, the 'OR' in the 'WHERE' clause is responsible for the INDEX FULL SCAN, what makes the query slow.
A solution would be then to separate the 'WHERE' clause in 2 separate select's (1 with 'knr = 100 and actnr > 30' and 1 with 'knr > 100' and combine the results with a UNION ALL.
Since it's necessary to have all rows in ascending order (oma_index1) I still have to use an ORDER BY to make sure the order of the rows is correct. This results again in a (too) low performance.
Another solution that does the trick is to create an index with the 2 fields (knr, projnr) concatenated and to use the same in the 'WHERE' clause:
create index oma_index2 on omschact (knr || projnr);
select /*+ index_asc(omschact oma_index2) */ knr, projnr, actnr from omschact where (knr || projnr) > 10030;
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padders,
I'll give the real data instead of the example. The index I really use consists of 4 fields. In this table the fields are just numbers, but in other tables I need to use char-fields in indexes, so that's why I concatenate instead of using formula's (allthough I would prefer the latter).
SQL> desc omschact
Name Null? Type
KNR NOT NULL NUMBER(8)
PROJNR NOT NULL NUMBER(8)
ACTNR NOT NULL NUMBER(8)
REGELNR NOT NULL NUMBER(3)
REGEL CHAR(60)
first methode:
SQL> create index oma_key_001(knr,projnr,actnr,regelnr);
Index created.
SQL> select /*+ index_asc(omschact oma_key_001) */ * from omschact where
2 (knr > 100 or
3 (knr = 100 and projnr > 30) or
4 (knr = 100 and projnr = 30 and actnr > 100000) or
5 (knr = 100 and projnr = 30 and actnr = 100000 and regelnr >= 0));
Execution Plan
Plan hash value: 1117430516
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 11M| 822M| 192K (1)| 00:38:26 |
| 1 | TABLE ACCESS BY INDEX ROWID| OMSCHACT | 11M| 822M| 192K (1)| 00:38:26 |
|* 2 | INDEX FULL SCAN | OMA_KEY_001 | 11M| | 34030 (1)| 00:06:49 |
Predicate Information (identified by operation id):
2 - filter("KNR">100 OR "KNR"=100 AND "PROJNR">30 OR "KNR"=100 AND "PROJNR"=30
AND "ACTNR">100000 OR "ACTNR"=100000 AND "KNR"=100 AND "PROJNR"=30 AND
"REGELNR">=0)
second method (same index):
SQL> select * from (
2 select /*+ index_asc(omschact oma_key_001) */ * from omschact where knr > 100
3 union all
4 select /*+ index_asc(omschact oma_key_001) */ * from omschact where knr = 100 and projnr > 30
5 union all
6 select /*+ index_asc(omschact oma_key_001) */ * from omschact where knr = 100 and projnr = 30 and actnr > 100000
7 union all
8 select /*+ index_asc(omschact oma_key_001) */ * from omschact where knr = 100 and projnr = 30 and actnr = 100000 and regelnr > 0)
9 order by knr, projnr, actnr, regelnr;
Execution Plan
Plan hash value: 292918786
| Id | Operation | Name | Rows | Bytes |TempSpc| Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 11M| 1203M| | 477K (1)| 01:35:31 |
| 1 | SORT ORDER BY | | 11M| 1203M| 2745M| 477K (1)| 01:35:31 |
| 2 | VIEW | | 11M| 1203M| | 192K (1)| 00:38:29 |
| 3 | UNION-ALL | | | | | | |
| 4 | TABLE ACCESS BY INDEX ROWID| OMSCHACT | 11M| 822M| | 192K (1)| 00:38:26 |
|* 5 | INDEX RANGE SCAN | OMA_KEY_001 | 11M| | | 33966 (1)| 00:06:48 |
| 6 | TABLE ACCESS BY INDEX ROWID| OMSCHACT | 16705 | 1272K| | 294 (1)| 00:00:04 |
|* 7 | INDEX RANGE SCAN | OMA_KEY_001 | 16705 | | | 54 (0)| 00:00:01 |
| 8 | TABLE ACCESS BY INDEX ROWID| OMSCHACT | 47 | 3666 | | 4 (0)| 00:00:01 |
|* 9 | INDEX RANGE SCAN | OMA_KEY_001 | 47 | | | 3 (0)| 00:00:01 |
| 10 | TABLE ACCESS BY INDEX ROWID| OMSCHACT | 1 | 78 | | 4 (0)| 00:00:01 |
|* 11 | INDEX RANGE SCAN | OMA_KEY_001 | 1 | | | 3 (0)| 00:00:01 |
Predicate Information (identified by operation id):
5 - access("KNR">100)
7 - access("KNR"=100 AND "PROJNR">30)
9 - access("KNR"=100 AND "PROJNR"=30 AND "ACTNR">100000)
11 - access("KNR"=100 AND "PROJNR"=30 AND "ACTNR"=100000 AND "REGELNR">0)
third method:
SQL> create index oma_test(to_char(knr,'00000000')||to_char(projnr,'00000000')||to_char(actnr,'00000000')||to_char(regelnr,'000'));
Index created.
SQL> select /*+ index_asc(omschact oma_test) */ * from omschact where
2 (to_char(knr,'00000000')||to_char(projnr,'00000000')||
3 to_char(actnr,'00000000')||to_char(regelnr,'000')) >=
4 (to_char(100,'00000000')||to_char(30,'00000000')||
5* to_char(100000,'00000000')||to_char(0,'000'))
Execution Plan
Plan hash value: 424961364
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
| 0 | SELECT STATEMENT | | 553K| 55M| 1712 (1)| 00:00:21 |
| 1 | TABLE ACCESS BY INDEX ROWID| OMSCHACT | 553K| 55M| 1712 (1)| 00:00:21 |
|* 2 | INDEX RANGE SCAN | OMA_TEST | 99543 | | 605 (1)| 00:00:08 |
Predicate Information (identified by operation id):
2 - access(TO_CHAR("KNR",'00000000')||TO_CHAR("PROJNR",'00000000')||TO_CHAR("
ACTNR",'00000000')||TO_CHAR("REGELNR",'000')>=TO_CHAR(100,'00000000')||TO_CHAR(3
0,'00000000')||TO_CHAR(100000,'00000000')||TO_CHAR(0,'000'))

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(select status, country, count(*) cnt01 from tmp tmp1 group by status, country) v1
JOIN
(select status, country, count(*) cntIncluding0 from tmp tmp2 where substatus=0 group by status, country) v2
on v1.status=v2.status and v1.country=v2.country;

totalnewby wrote:
Do I need to use these two inner views to show results by group by as one line? Can I achieve the same result without typing the same select statement two times since these two SELECT statements differ only in where clause. This query is a simulation. My actual query is longer. My expectation is to make this query shorter (without inner views).
with tmp as (
select 'COMPLETE' status, 'GERMANY' country, 0 substatus FROM dual UNION ALL
select 'COMPLETE' status, 'GERMANY' country, 1 substatus FROM dual UNION ALL
select 'COMPLETE' status, 'GERMANY' country, 0 substatus FROM dual)
select v1.status, v1.country, v1.cnt01, v2.cntIncluding0 from
(select status, country, count(*) cnt01 from tmp tmp1 group by status, country) v1
JOIN
(select status, country, count(*) cntIncluding0 from tmp tmp2 where substatus=0 group by status, country) v2
on v1.status=v2.status and v1.country=v2.country;
SQL> with tmp as
2 (
3 select 'COMPLETE' status, 'GERMANY' country, 0 substatus FROM dual UNION ALL
4 select 'COMPLETE' status, 'GERMANY' country, 1 substatus FROM dual UNION ALL
5 select 'COMPLETE' status, 'GERMANY' country, 0 substatus FROM dual
6 )
7 select status,
8         country,
9         count(substatus) cnt01,
10         sum(decode(substatus, 0, 1, 0)) cntincluding0
11    from tmp
12   group by status, country
13 ;
STATUS   COUNTRY      CNT01 CNTINCLUDING0
COMPLETE GERMANY          3             2

Pagination after executequery with a dynamic where clause

Hi all,
I have a problem with pagination after setting a where clause dynamically and performing an executequery in ViewObjectImpl.java.
As a result of this, the amount of records are decreased returned by the viewobject, however the pagination is not changed. It still reflects the previous amount. It changes only if you have selected the last range of the changed recordset
Does anybody know how to get the pagination to refect the correct amount of the updated recordset of the viewobject?
Jdeveloper version 10.1.3.4 / Jheadstart 10.1.3.3.81
Thanks in advance, Erwin

Hi,
I would not add this to the VO query. Instead I would create a View Criteria that uses a bind variable. Then in the Application Module Data Model, you select the VO instance and choose edit (button on top) to permanently associate the view criteria)
Advantages of this approach
- The VO definition can be used elsewhere without the restriction
- the bind variable is not mandatory and yu can set it such that if no value is provided a full query is executed
Frank

Count all values with a special WHERE clause in a select for a group?

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