How to perform a self-join in WebI?

Post Author: willgreenland
CA Forum: WebIntelligence Reporting
I want to perform a self-join on a table in WebI, in order to achieve the following result (of course, if there is another way of doing this I'd be glad to hear it):
I have a table that lists the department in which an employee is located at given dates in the past:
EMPLID    DEPT    DATE
123                Sales    2007...
I want to use this table to track migration between departments, in other words I want to produce the following output table, showing how in 2008, 5 employees moved from Sales to Marketing (etc):DEPT_A    DATE_A    DEPT_B    DATE_B    COUNT(EMPLID) Sales        2007          Mrkting      2008             5...
In order to do this in SQL, I would do the following:
SELECT a.DEPT, b.DEPT, count(distinct EMPLID)FROMEMPL_DEPT a, EMPL_DEPT b        // note the self-join hereWHERE( a.EMPLID = b.EMPLID AND a.DATE = '2007' AND b.DATE = '2008' )GROUP BY a.DEPT, b.DEPT;
Is there a way of doing this in WebI, ideally without resorting to manual SQL editing (I want this to be a report that other users can make sense of without necessarily getting into the SQL)?

Post Author: amr_foci
CA Forum: WebIntelligence Reporting
you cant do something like that in the WebI directly, you have to manager that at the unvinerse level first
good luck

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Performance Tuning - Self Join Issue

Hi,
The following query takes long time to execute. Is there any better way to
re-writing the query to reduce the time it takes to execute.
INSERT INTO TT_TEMP_MAINGUI_SP_PERCENT_MOV
(prev_prc_dt,asset_id,pricing_pt_id,price_dt)
SELECT max(tpm2.prc_dt),
tpm2.asset_id ,
tpm2.pricing_pt_id ,
tpm1.prc_dt
FROM t_prc_master tpm1,
t_prc_master tpm2
WHERE tpm1.prc_dt = '19-Dec-07'
AND tpm1.asset_id = tpm2.asset_id
AND tpm1.pricing_pt_id = tpm2.pricing_pt_id
AND tpm2.prc_dt < tpm1.prc_dt
AND tpm2.accept_flg = 'Y'
AND tpm1.accept_flg = 'Y'
AND EXISTS (SELECT 1 FROM t_temp_prcmov
WHERE pca_flg = 'P'
AND tpm1.pricing_pt_id = prc_pt_cntry_atyp)
GROUP BY tpm2.asset_id, tpm2.pricing_pt_id,tpm1.prc_dt;
select count(*) from t_prc_master
where prc_dt = '19-Dec-07'
COUNT(*)
784161
-- Here is the TKPROF Output
INSERT INTO TT_TEMP_MAINGUI_SP_PERCENT_MOV
(prev_prc_dt,asset_id,pricing_pt_id,price_dt)
SELECT max(tpm2.prc_dt),
tpm2.asset_id ,
tpm2.pricing_pt_id ,
tpm1.prc_dt
FROM t_prc_master tpm1,
t_prc_master tpm2
WHERE tpm1.prc_dt = '19-Dec-07'
AND tpm1.asset_id = tpm2.asset_id
AND tpm1.pricing_pt_id = tpm2.pricing_pt_id
AND tpm2.prc_dt < tpm1.prc_dt
AND tpm2.accept_flg = 'Y'
AND tpm1.accept_flg = 'Y'
AND EXISTS (SELECT 1 FROM t_temp_prcmov
WHERE pca_flg = 'P'
AND tpm1.pricing_pt_id = prc_pt_cntry_atyp)
GROUP BY tpm2.asset_id, tpm2.pricing_pt_id,tpm1.prc_dt
call count cpu elapsed disk query current rows
Parse 1 0.00 0.00 0 0 0 0
Execute 1 226.01 317.50 1980173 4915655 805927 780544
Fetch 0 0.00 0.00 0 0 0 0
total 2 226.01 317.51 1980173 4915655 805927 780544
Misses in library cache during parse: 1
Optimizer goal: CHOOSE
Parsing user id: 98 (PRSDBO)
Rows Row Source Operation
780544 SORT GROUP BY (cr=4915236 r=1980165 w=0 time=312751120 us)
40416453 NESTED LOOPS (cr=4915236 r=1980165 w=0 time=245408132 us)
783459 NESTED LOOPS (cr=956325 r=92781 w=0 time=17974163 us)
55 TABLE ACCESS FULL T_TEMP_PRCMOV (cr=3 r=0 w=0 time=406 us)
783459 TABLE ACCESS BY INDEX ROWID T_PRC_MASTER (cr=956322 r=92781 w=0 time=17782856 us)
784161 INDEX RANGE SCAN PRC_DT_ASSET_ID (cr=412062 r=69776 w=0 time=14136725 us)(object id 450059)
40416453 INDEX RANGE SCAN ASSET_DT_ACCEPT_FLG (cr=3958911 r=1887384 w=0 time=217215303 us)(object id 450055)
Rows Execution Plan
0 INSERT STATEMENT GOAL: CHOOSE
780544 SORT (GROUP BY)
40416453 NESTED LOOPS
783459 NESTED LOOPS
55 TABLE ACCESS GOAL: ANALYZED (FULL) OF 'T_TEMP_PRCMOV'
783459 TABLE ACCESS GOAL: ANALYZED (BY INDEX ROWID) OF
'T_PRC_MASTER'
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(NON-UNIQUE)
40416453 INDEX GOAL: ANALYZED (RANGE SCAN) OF 'ASSET_DT_ACCEPT_FLG'
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Could somebody help me in resolving the issue? It would be appreciated...

Well, it's a bit of a mess to read. Please use the pre or code tags enclosed in [] next time to preserve the formatting of the code.
First thing that looks 'bad' to me is
WHERE tpm1.prc_dt = '19-Dec-07'which should be (i assume you want 2007 and not 1907)
WHERE tpm1.prc_dt = TO_DATE('19-Dec-2007', 'DD-MON-YYYY');The next thing i'm very confused with is...why are you self joining the table? You should be able to just do this.....logically, it should produce the same results, though it's obviously not tested :D)
SELECT
   max(tpm2.prc_dt),
   tpm2.asset_id ,
   tpm2.pricing_pt_id ,
   TO_DATE('19-Dec-2007', 'DD-MON-YYYY') AS prc_dt
FROM t_prc_master tpm2
WHERE tpm2.prc_dt < TO_DATE('19-Dec-2007', 'DD-MON-YYYY')
AND   tpm2.accept_flg = 'Y'
AND   EXISTS   (
                  SELECT
                     NULL
                  FROM t_prc_master tpm1
                  WHERE tpm1.prc_dt          = TO_DATE('19-Dec-2007', 'DD-MON-YYYY')
                  AND   tpm1.asset_id        = tpm2.asset_id
                  AND   tpm1.pricing_pt_id   = tpm2.pricing_pt_id
                  AND   tpm1.accept_flg      = 'Y'
                  AND   tpm1.pricing_pt_id IN (SELECT tmov.prc_pt_cntry_atyp FROM t_temp_prcmov tmov WHERE tmov.pca_flg = 'P')
GROUP BY tpm2.asset_id, tpm2.pricing_pt_id, TO_DATE('19-Dec-2007', 'DD-MON-YYYY');Message was edited by:
Tubby

How to resolve Self Joins in OBIEE

Hi All
Could any one help how to resolve the Self Join relations in OBIEE (ex. "SCOTT.EMP" table has "EMPNO" column which is referenced by "MGR" column in the same table.
Request:
Need to drill down from the Top manager to his employees and so on
Another example can be applied for reporting the Organisation Chart

This is a great article that shows ho to do the Alias:
Adding an Alias table within the BI physical layer using Oracle BI Administration Tool
http://www.mandsconsulting.com/adding-an-alias-table-within-oracle-bi-administration-tool
Thanks
Subra

Self join using ABAP Query

Hello all,
How to create a self join using ABAP Query?
Say, I have this table EKBE with belnr (materials doc num) and lfbnr (reference material doc num). I have to pick the PO's from EKBE whose belnr doesnt have any lfbnr.
Regards
Madhumathi A

hi madhu,
tables : ekbe.
data itab like standard table of ekbe with header line.
select * from ekbe into table itab where belnr >< 0 and lfbnr = ' '.
loop at itab.
write :/ itab-belnr,itab-lfbnr.
endloop.
check this code this works to select the orders whose belnr doesnt have any lfbnr
reward points if useful.

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parent child name
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1     3     A3
how to achieve the hierarchy model using self join. this can be easily achieved using "connect by prior". but how to achieve the same using self join?

Hi,
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Inner Join. How to improve the performance of inner join query.
Query is :
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Treat this is very urgent.

Hi Shyamal,
In your program , you are using "into corresponding fields of ".
Try not to use this addition in your select query.
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As an example,
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So try not to give "into corresponding fields" in your query.
Regards,
SP.

How to re-write this self join update using a CTE

I would like to improve my performance on this update statement and would like to try re-writing using a CTE:
UPDATE "usr_sessions" "a" SET "is_ended_at_trustable" = 't'
WHERE (
EXISTS (
SELECT 1
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AND "a"."usr_space_id" = "b"."usr_space_id"
AND "a"."account_id" = "b"."account_id"
) ) AND "a"."is_ended_at_trustable" IS NULL
Any help is greatly appreciated! Open to other suggestions as well if there is a better way!

If I understood your description correctly, here's a way to accomplish the same thing, while dodging the need for the self join. The update itself won't be any faster, but the overall query leading to the update will likely be faster sans self-join.
(If my interpretation wasn't exactly what you meant, tweak the "partition by" clause).
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Setup_Example_Data:
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UNION ALL Select 5, 50, NULL, 'E1', 'E2'
UNION ALL Select 5, 51, NULL, 'E3', 'E3'
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UNION ALL Select 6, 62, 't', 'F3', 'F3'
UNION ALL Select 6, 62, 'f', 'F4', 'F4'
Select 'Before', * from @Usr_Sessions
OP_Query:
BEGIN TRAN
UPDATE A SET is_ended_at_trustable = 't' from @usr_Sessions A-- Select * from @Usr_Sessions "a" --
WHERE (
EXISTS (
SELECT 1
FROM @usr_sessions "b"
WHERE "a"."ended_at" = "b"."started_at"
AND "a"."usr_space_id" = "b"."usr_space_id"
AND "a"."account_id" = "b"."account_id"
) ) AND "a"."is_ended_at_trustable" IS NULL
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over(partition by account_id, usr_space_id) as Updatable
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How to write self join in sql?

Hi,
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now i need to write query with self join, to include above concept. can any one please help me .
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I just want to re write
Please provide DDL+DML + expected output!
and short explanation what is it that we all ask you for:
DDL = Data Definition Language. In our case that is, CREATE TABLE statements for your tables and other definitions that are needed to understand your tables structure and there for let us to test and reproduce the problem in our server. Without DDL no one
can execute any query.
How to get DDL: Right click on the table in Object Explorer and select script table as CREATE. Post these create table scripts here.
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How is performance of Appache Web Server + Tomcat?

I am wondering how the performance of Appache web server + Tomcat => Java enabled web server is ?
such as handling multiple users, heavy web traffic, JSP-JavaBean performance...in a real industrial setting?
If "Appache web server + Tomcat" is an excellent choice, why companies still spend big bucks on things like WebLogic, JRun, etc?
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How to Avoid Self Join

Hi
Assume I have following table
Id Code
1 aa
1 bb
1 cc
2 bb
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Is it possible to obtain the desired result in a single query without using Self join?
Regards
~Pravin

This is a little clumsy....Anyway try it:
WITH t AS
(SELECT 1 id,'aa' code FROM dual
UNION ALL
SELECT 1,'bb' FROM dual
UNION ALL
SELECT 1,'cc' FROM dual
UNION ALL
SELECT 2,'bb' FROM dual
UNION ALL
SELECT 2,'cc' FROM dual)
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WHERE code IN('aa', 'bb')
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Recursive Self Join

Hi. I need to query the database of a document management system.   Documents are logically stored in folders in a tree structure and may be nested to arbitrary depth. The FOLDER table lists the names and metadata of folders.
Ultimately, I want to join the FOLDER table ("f") to the DOCUMENT table ("d") to get a list of documents by folder. The main thing I need help with is to build folder paths. I don't necessarily even
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2                    1
3                    1
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etc.
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See Itzik Ben-Gan examples dealing with such queries.
CREATE TABLE Employees
empid int NOT NULL,
mgrid int NULL,
empname varchar(25) NOT NULL,
salary money NOT NULL,
CONSTRAINT PK_Employees PRIMARY KEY(empid),
CONSTRAINT FK_Employees_mgrid_empid
FOREIGN KEY(mgrid)
REFERENCES Employees(empid)
CREATE INDEX idx_nci_mgrid ON Employees(mgrid)
SET NOCOUNT ON
INSERT INTO Employees VALUES(1 , NULL, 'Nancy' , $10000.00)
INSERT INTO Employees VALUES(2 , 1 , 'Andrew' , $5000.00)
INSERT INTO Employees VALUES(3 , 1 , 'Janet' , $5000.00)
INSERT INTO Employees VALUES(4 , 1 , 'Margaret', $5000.00)
INSERT INTO Employees VALUES(5 , 2 , 'Steven' , $2500.00)
INSERT INTO Employees VALUES(6 , 2 , 'Michael' , $2500.00)
INSERT INTO Employees VALUES(7 , 3 , 'Robert' , $2500.00)
INSERT INTO Employees VALUES(8 , 3 , 'Laura' , $2500.00)
INSERT INTO Employees VALUES(9 , 3 , 'Ann' , $2500.00)
INSERT INTO Employees VALUES(10, 4 , 'Ina' , $2500.00)
INSERT INTO Employees VALUES(11, 7 , 'David' , $2000.00)
INSERT INTO Employees VALUES(12, 7 , 'Ron' , $2000.00)
INSERT INTO Employees VALUES(13, 7 , 'Dan' , $2000.00)
INSERT INTO Employees VALUES(14, 11 , 'James' , $1500.00)
The first request is probably the most common one:
returning an employee (for example, Robert whose empid=7)
and his/her subordinates in all levels.
The following CTE provides a solution to this request:
WITH EmpCTE(empid, empname, mgrid, lvl)
AS
-- Anchor Member (AM)
SELECT empid, empname, mgrid, 0
FROM Employees
WHERE empid = 7
UNION ALL
-- Recursive Member (RM)
SELECT E.empid, E.empname, E.mgrid, M.lvl+1
FROM Employees AS E
JOIN EmpCTE AS M
ON E.mgrid = M.empid
SELECT * FROM EmpCTE
Using this level counter you can limit the number of iterations
in the recursion. For example, the following CTE is used to return
all employees who are two levels below Janet:
WITH EmpCTEJanet(empid, empname, mgrid, lvl)
AS
SELECT empid, empname, mgrid, 0
FROM Employees
WHERE empid = 3
UNION ALL
SELECT E.empid, E.empname, E.mgrid, M.lvl+1
FROM Employees as E
JOIN EmpCTEJanet as M
ON E.mgrid = M.empid
WHERE lvl < 2
SELECT empid, empname
FROM EmpCTEJanet
WHERE lvl = 2
As mentioned earlier, CTEs can refer to
local variables that are defined within the same batch.
For example, to make the query more generic, you can use
variables instead of constants for employee ID and level:
DECLARE @empid AS INT, @lvl AS INT
SET @empid = 3 -- Janet
SET @lvl = 2 -- two levels
WITH EmpCTE(empid, empname, mgrid, lvl)
AS
SELECT empid, empname, mgrid, 0
FROM Employees
WHERE empid = @empid
UNION ALL
SELECT E.empid, E.empname, E.mgrid, M.lvl+1
FROM Employees as E
JOIN EmpCTE as M
ON E.mgrid = M.empid
WHERE lvl < @lvl
SELECT empid, empname
FROM EmpCTE
WHERE lvl = @lvl
Results generated thus far might be returned (but are not guaranteed to be),
and error 530 is generated. You might think of using the MAXRECURSION option
to implement the request to return employees who are two levels below
Janet using the MAXRECURSION hint instead of the filter in the recursive member
WITH EmpCTE(empid, empname, mgrid, lvl)
AS
SELECT empid, empname, mgrid, 0
FROM Employees
WHERE empid = 1
UNION ALL
SELECT E.empid, E.empname, E.mgrid, M.lvl+1
FROM Employees as E
JOIN EmpCTE as M
ON E.mgrid = M.empid
SELECT * FROM EmpCTE
OPTION (MAXRECURSION 2)
WITH EmpCTE(empid, empname, mgrid, lvl, sortcol)
AS
SELECT empid, empname, mgrid, 0,
CAST(empid AS VARBINARY(900))
FROM Employees
WHERE empid = 1
UNION ALL
SELECT E.empid, E.empname, E.mgrid, M.lvl+1,
CAST(sortcol + CAST(E.empid AS BINARY(4)) AS VARBINARY(900))
FROM Employees AS E
JOIN EmpCTE AS M
ON E.mgrid = M.empid
SELECT
REPLICATE(' | ', lvl)
+ '(' + (CAST(empid AS VARCHAR(10))) + ') '
+ empname AS empname
FROM EmpCTE
ORDER BY sortcol
(1) Nancy
| (2) Andrew
| | (5) Steven
| | (6) Michael
| (3) Janet
| | (7) Robert
| | | (11) David
| | | | (14) James
| | | (12) Ron
| | | (13) Dan
| | (8) Laura
| | (9) Ann
| (4) Margaret
| | (10) Ina
Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
MS SQL optimization: MS SQL Development and Optimization
MS SQL Consulting:
Large scale of database and data cleansing
Remote DBA Services:
Improves MS SQL Database Performance
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Business Intelligence

Set operator Vs Self join

hi all,
i have a main table and a corresponding history table.
Like employee and h_employee both has primary key as emp_id.
now i want a query which should only retrieve the common values among these two table.
I have an idea of doing this in two way 1.self join 2. set operator
1.select emp_id
from emp e,h_emp h
using (emp_id)
2. select emp_id from emp
intersect
select emp_id from h_emp
now guide me which gives better performance? how to evaluate the performance in PL/SQL Developer client?
is there any keyword to trace the timing of the each query?
Please advice.
Regards,
Slu

Set operators combines the output of 2 or more queries into single output....
Internally its doing sorting the two tables
Join is just matching the records based on the where condition ....
use Explain plan to the cost of the query
SQL> Explain plan for select emp_id
from emp e,h_emp h
using (emp_id)
and use
SQL > select * from plan_table
to see the cost...
Edited by: LPS on Jul 12, 2011 12:08 AM

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END;
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DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST1_IDX1');
DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST2_IDX2');
DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST1_IDX2');
DBMS_STATS.gather_index_stats(ownname => 'PHASE30DEV',indname => 'RTEST2_IDX1');
END; Pls suggest !!!!!!! How can I tune the Joins with "OR" Clause.
Regards
RJ

I don't like it, but you could use a hint:
SQL>r
1 SELECT A.ID, B.VMONTH
2 FROM RTEST1 A , RTEST2 B
3 WHERE A.ID = B.ID
4* AND ( (A.ID = B.VMONTH) OR ( B.ID = A.VMONTH ) )
Execution Plan
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=94 Card=2 Bytes=28)
   1    0   TABLE ACCESS (BY INDEX ROWID) OF 'RTEST2' (Cost=94 Card=1 Bytes=7)
   2    1     NESTED LOOPS (Cost=94 Card=2 Bytes=28)
   3    2       TABLE ACCESS (FULL) OF 'RTEST1' (Cost=20 Card=100000 Bytes=700000)
   4    2       BITMAP CONVERSION (TO ROWIDS)
   5    4         BITMAP AND
   6    5           BITMAP CONVERSION (FROM ROWIDS)
   7    6             INDEX (RANGE SCAN) OF 'RTEST2_PK' (UNIQUE)
   8    5           BITMAP OR
   9    8             BITMAP CONVERSION (FROM ROWIDS)
10    9               INDEX (RANGE SCAN) OF 'RTEST2_IDX1' (NON-UNIQUE)
11    8             BITMAP CONVERSION (FROM ROWIDS)
12   11               INDEX (RANGE SCAN) OF 'RTEST2_PK' (UNIQUE)
Statistics
          0 recursive calls
          0 db block gets
     300332 consistent gets
          0 physical reads
          0 redo size
        252 bytes sent via SQL*Net to client
        235 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
          0 sorts (memory)
          0 sorts (disk)
          2 rows processed
SQL>SELECT /*+ ordered use_hash(b) */ A.ID, B.VMONTH
2    FROM RTEST1 A, RTEST2 B
3   WHERE A.ID = B.ID AND(A.ID = B.VMONTH OR B.ID = A.VMONTH)
4 ;
Execution Plan
   0      SELECT STATEMENT Optimizer=CHOOSE (Cost=175 Card=2 Bytes=28)
   1    0   HASH JOIN (Cost=175 Card=2 Bytes=28)
   2    1     TABLE ACCESS (FULL) OF 'RTEST1' (Cost=20 Card=100000 Bytes=700000)
   3    1     TABLE ACCESS (FULL) OF 'RTEST2' (Cost=20 Card=100000 Bytes=700000)
Statistics
          9 recursive calls
          0 db block gets
        256 consistent gets
        156 physical reads
          0 redo size
        252 bytes sent via SQL*Net to client
        235 bytes received via SQL*Net from client
          2 SQL*Net roundtrips to/from client
          0 sorts (memory)
          0 sorts (disk)
          2 rows processed

When (or how) is a job available as a web service?

We've created a web client application which is able to launch a job from web services. So I create a job with Data Services, but I can't tell how I'm supposed to make the job available to the client.
If I call the job right directly after I create it, then I get a message that the job isn't known. But if I open the Management Console and open the Web Services Configuration tab, then I see my new job and I can call it. If I then create a new job in the Designer, I have to simply perform a refresh on the Web Services Configuration tab in order to be able to call the job.
It seems that the simple act of opening the Web Services Configuration tab enables the job, but I kind of think this means that I'm not doing something right. Perhaps I'm missing a call in the client? Can anyone point me in the right direction (like specific section of a specific document)? All I can find is information on how to generate the WDSL, but I don't think I need that.
I'd really like to eliminate any need to do manual steps between creating the job and calling it.
BTW, we changed the generated code to be more generic so that we wouldn't have to generate it every time we wanted to add a job to web services. So instead of calling the hard-coded get<job-name>_GlobalVariables(), we completely re-wrote the serializer and build the global variables string dynamically.
Thanks for your help.
Edited by: Kim Wykoff on Sep 11, 2008 3:52 PM

So you are saying that for any new job you create in the repository, it is added automatically in the Management Console as a webservice ? That's very weird and definitely not what I'm seeing in my environment...
Could this be linked to changes you made ? I didn't fully understand what you mean with your quote below - did you make changes to the Data Services code in the Management Console (???) or just changed the generated WSDL ?
>
Kim Wykoff wrote:
> BTW, we changed the generated code to be more generic so that we wouldn't have to generate it every time we wanted to add a job to web services. So instead of calling the hard-coded get<job-name>_GlobalVariables(), we completely re-wrote the serializer and build the global variables string dynamically.
>
Let's provide some background information on why we need the additional step of enabling a job in the Management Console and not expose any job in the repo as a web service.
We require this additional step for security reasons. We want an administrator to enable only those jobs that can be consumed by external applications. This gives some level of control on which jobs can be executed (so not jobs currently in dev or jobs that load sensitive data, ...).
We've made an enhancement however in the upcoming Data Services XI 3.1 release (available one of the next weeks) to make this more flexible. And I think this is exactly what you were trying to accomplish with the WSDL modifications. A new generic webservice is provided that can launch any enabled job, together with an operation to get a list of all enabled jobs. So you no longer need to hardcode all the operations for each job in the client application. Additionally we've also added a webservice operation to retrieve the input schema for a real-time job.

How to perform a self-join in WebI?

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