How to set UP a QUERY (improvement)
Hello everyone, I'm a few oracle classes I found a delicate question in one of the slides...? Create a query to view the total number of employees, and of this total, the number of employees hired in 1995, 1996, 1997 and 1998. Create column headings appropriate?
I fact as shown below...
SELECT DISTINCT
(select count (to_char (hire_date, "YYYY")) of employee where to_char (hire_date, "YYYY") AS '1995') such as '1995 ',.
(select count (to_char (hire_date, "YYYY")) of employee where to_char (hire_date, "YYYY") AS "1996") as "1996", he said.
(select count (to_char (hire_date, "YYYY")) of employee where to_char (hire_date, "YYYY") AS '1997') as '1997 ',.
(SELECT COUNT (TO_CHAR (HIRE_DATE, "YYYY")) OF EMPLOYEE WHERE TO_CHAR (HIRE_DATE, "YYYY") AS "1998") AS "1998".
employee where to_char (hire_date, "YYYY") IN ('1995', '1996', '1997', ' 1998') group to_char (hire_date, "YYYY");
I know theres another way to do with DECODE or CASE, or any other means... but I tried a lot, and it's one that I found to do...
Will you help me get a better selection please...
THX
select count(*) total,
count(case to_char(hire_date, 'YYYY') when '1995' then 1 end) as "1995",
count(case to_char(hire_date, 'YYYY') when '1996' then 1 end) as "1996",
count(case to_char(hire_date, 'YYYY') when '1997' then 1 end) as "1997",
count(case to_char(hire_date, 'YYYY') when '1998' then 1 end) as "1997"
from employees
/
TOTAL 1995 1996 1997 1997
---------- ---------- ---------- ---------- ----------
107 4 10 28 23
SQL>
SY.
Tags: Database
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access("T786"."DATE_KEY"="T1830"."DATE_KEY") 9 - access("T786"."PERFORMANCE_KEY"="T2158"."PERFORMANCE_KEY") 13 - access("T160"."FLUIDE_KEY"="T210"."FLUIDE_KEY") 15 - access("T160"."TYP_PDC_KEY"="T217"."TYP_PDC_KEY") 19 - access("T122"."OFFRE_KEY"="T298"."OFFRE_KEY") 21 - access("T24"."CONTRAT_KEY"="T298"."CONTRAT_KEY" AND "T17"."CONTRACTANT_KEY"="T298"."CONTRACTANT_KEY") 24 - filter("T24"."NOM_CONTRAT"='COMMUNAY ET REGION (SIE)') 25 - access("T17"."CONTRACTANT_KEY"="T24"."CONTRACTANT_KEY") 26 - filter("T17"."NOM_CONTRACTANT"='ER Rhône Alpes Auvergne') 28 - access("T160"."SERVICE_POINT_KEY"="T298"."SERVICE_POINT_KEY") 31 - filter("T786"."REPORTING_DATE"=TO_DATE(' 2013-02-09 00:00:00', 'syyyy-mm-dd hh24:mi:ss')) 32 - access("T160"."SERVICE_POINT_KEY"="T786"."SERVICE_POINT_KEY") 34 - access("T786"."DIAGNOSYS_KEY"="T2186"."DIAGNOSYS_KEY") 37 - access("T786"."RADIO_MODULE_KEY"="T949"."RADIO_MODULE_KEY") 39 - access("T786"."METER_MODULE_KEY"="T1191"."METER_MODULE_KEY") 41 - access("T786"."CUSTOMER_KEY"="T2098"."CUSTOMER_KEY") 42 - 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(1) for a significant query, it is rare that the optimizer obtains all right cardinalities
(2) but normally, it is not really necessary, in most cases just to be in the right ballpark (1-2 orders of magnitude)
(3) as others already said, the optimizer in your case does that 1 error - in step 1, when evaluating a cardinality of a hash of several columns, the steps join upward simply reproduce this error over and over
(4) rethink the cardinality of the join is always difficult, and especially when it comes to columns multiple joins because you have several possibilities made a mistake in the selectivity of unique columns, but also because there is a chance that there is a correlation between the columns attached; also, the optimizer uses many settings, called 'mental health controls', which does not make things more simple
(5) you can try to create statistics on a column in the joined columns group for a more accurate forecast of join cardinality
(6) there again, get all the cardinalities right does not guarantee that you will get a good plan - for example, you may be limited by the lack of an appropriate index
(7) sometimes, and more feedback of cardinality (or even instead) it is better to tackle the problem from a different angle: see what operations are ineffective (e.g. rejection lines after spending a lot of e/s on their acquisition), see http://savvinov.com/2013/01/28/efficiency-based-sql-tuning/
(8) in your case, you have noticed that you: step|* 31 | TABLE ACCESS BY LOCAL INDEX ROWID| FAC_DAILY_TRANS_PERFORM | 8758 | 1 | 8631 |00:02:33.18 | 80816 | 37669 | 0 | | | |is the biggest problem for this plan, even if the cardinality estimate of it's very precise
(9) you can fix the problem by extending the IDX3_FAC_DAY_TRAN_PERF index to the REPORTING_DATE column: If you do this, then you won't need to 63 k logical reads to return lines k 103 just to reject 90% of them - you will reject them at an earlier stage (INDEX RANGE SCAN) and only need to at most 8 k readings to acquire the filtered lines by table rowidBest regards
Nikolai -
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Denes Kubicek
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http://Apex.Oracle.com/pls/Apex/f?p=31517:1
http://www.Amazon.de/Oracle-Apex-XE-Praxis/DP/3826655494
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After reading the stories, I am unable to find how to get the execution of the query, but not sure about re writing the query plan. This is the execution plan.
Please help me by rewriting the query and guide me some ground rules for rewriting where needed.
203 rows selected. Execution Plan ---------------------------------------------------------- 0 SELECT STATEMENT Optimizer=ALL_ROWS (Cost=5745 Card=1 Bytes= 222) 1 0 SORT (GROUP BY NOSORT) (Cost=5570 Card=1 Bytes=12) 2 1 TABLE ACCESS (FULL) OF 'FAMIS_REQ' (TABLE) (Cost=5570 Ca rd=1 Bytes=12) 3 0 SORT (GROUP BY NOSORT) (Cost=5563 Card=1 Bytes=8) 4 3 TABLE ACCESS (FULL) OF 'FAMIS_REQ' (TABLE) (Cost=5563 Ca rd=1 Bytes=8) 5 0 NESTED LOOPS (OUTER) (Cost=5745 Card=1 Bytes=222) 6 5 FILTER 7 6 NESTED LOOPS (OUTER) (Cost=5743 Card=1 Bytes=198) 8 7 NESTED LOOPS (OUTER) (Cost=5742 Card=1 Bytes=163) 9 8 HASH JOIN (Cost=5739 Card=1 Bytes=140) 10 9 NESTED LOOPS 11 10 NESTED LOOPS (Cost=5567 Card=1 Bytes=98) 12 11 TABLE ACCESS (FULL) OF 'FAMIS_REQ' (TABLE) ( Cost=5565 Card=1 Bytes=90) 13 11 INDEX (RANGE SCAN) OF 'FAMIS_REQUESTOR1' (IN DEX) (Cost=1 Card=1) 14 10 TABLE ACCESS (BY INDEX ROWID) OF 'FAMIS_REQUES TOR' (TABLE) (Cost=2 Card=1 Bytes=8) 15 9 TABLE ACCESS (FULL) OF 'FAM_PERSON' (TABLE) (Cos t=172 Card=1074 Bytes=45108) 16 8 TABLE ACCESS (BY INDEX ROWID) OF 'LEASE_CONTACT' ( TABLE) (Cost=3 Card=1 Bytes=23) 17 16 INDEX (RANGE SCAN) OF 'FK_LEASECONTACT_CONTACT' (INDEX) (Cost=1 Card=1) 18 7 TABLE ACCESS (BY INDEX ROWID) OF 'LEASE' (TABLE) (Co st=1 Card=1 Bytes=35) 19 18 INDEX (UNIQUE SCAN) OF 'PK_LEASE' (INDEX (UNIQUE)) (Cost=0 Card=1) 20 5 TABLE ACCESS (BY INDEX ROWID) OF 'FAMIS_LEASE_LOCATION' (TABLE) (Cost=2 Card=1 Bytes=24) 21 20 INDEX (RANGE SCAN) OF 'FAMIS_LEASE_LOC_LEASE_FK' (INDE X) (Cost=1 Card=1) Statistics ---------------------------------------------------------- 0 recursive calls 0 db block gets 8484854 consistent gets 0 physical reads 0 redo size 34190 bytes sent via SQL*Net to client 9592 bytes received via SQL*Net from client 15 SQL*Net roundtrips to/from client 0 sorts (memory) 0 sorts (disk) 203 rows processed SQL>
Apologies for any inconvenience in the reading of the application. This is the query.
SELECT a.req_number, a.req_status, a.wo_number, a.wo_status, a.description, a.requestor, a.req_date, a.enter_date, a.pl_number, a.site, a.building, a.room, a.attribute2, b.emp_id, c.custom09, c.custom13, c.custom11, c.custom16 + 1 AS family_no, c.active_flag, e.leaseid, e.commdate, e.enddate, e.functional_status, f.site_code, CASE WHEN c.custom09 = 'Married' THEN 10 ELSE 0 END AS married, CASE WHEN (CASE WHEN (c.custom16 + 1) > 4 THEN 10 ELSE (c.custom16 + 1) * 2 END ) IS NULL THEN 0 ELSE (CASE WHEN (c.custom16 + 1) > 4 THEN 10 ELSE (c.custom16 + 1) * 2 END) END AS family, CASE WHEN c.custom11 = 'Canadian Management' THEN 8 ELSE 0 END AS job, CASE WHEN ( CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY') ) > 36 THEN 6 ELSE 0 END + CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY') ) > 36 THEN ( MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) - 36 ) / 24 ELSE MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) / 24 END ) IS NULL THEN 0 ELSE ( CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY') ) > 36 THEN 6 ELSE 0 END + CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY') ) > 36 THEN ( MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) - 36 ) / 24 ELSE MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) / 24 END ) END AS hire, CASE WHEN MONTHS_BETWEEN (SYSDATE, a.req_date) * 4 > 10 THEN 10 ELSE MONTHS_BETWEEN (SYSDATE, a.req_date) * 4 END AS entered, CASE WHEN c.custom09 = 'Married' THEN 10 ELSE 0 END + CASE WHEN (CASE WHEN (c.custom16 + 1) > 4 THEN 10 ELSE (c.custom16 + 1) * 2 END ) IS NULL THEN 0 ELSE (CASE WHEN (c.custom16 + 1) > 4 THEN 10 ELSE (c.custom16 + 1) * 2 END ) END + CASE WHEN c.custom11 = 'Canadian Management' THEN 8 ELSE 0 END + CASE WHEN ( CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) > 36 THEN 6 ELSE 0 END + CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) > 36 THEN ( MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) - 36 ) / 24 ELSE MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) / 24 END ) IS NULL THEN 0 ELSE ( CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) > 36 THEN 6 ELSE 0 END + CASE WHEN MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) > 36 THEN ( MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) - 36 ) / 24 ELSE MONTHS_BETWEEN (SYSDATE, TO_DATE (c.custom13, 'MM/DD/YYYY' ) ) / 24 END ) END + CASE WHEN MONTHS_BETWEEN (SYSDATE, a.req_date) * 4 > 10 THEN 10 ELSE MONTHS_BETWEEN (SYSDATE, a.req_date) * 4 END + CASE WHEN a.attribute2 IS NULL THEN '0' ELSE a.attribute2 END AS total, CASE WHEN f.site_code IN ('AJ1', 'AJ2', 'AJ3', 'RG1') THEN f.building_code ELSE f.space_code END AS SPACE, CASE WHEN a.site IN ('AJ1', 'AJ2', 'AJ3', 'RG1') THEN a.building ELSE a.room END AS space_req, CASE WHEN a.pl_number = '002002001' THEN 'Villa to Villa' ELSE (CASE WHEN a.pl_number = '002002002' THEN 'Apartment to Villa' ELSE (CASE WHEN a.pl_number = '002002003' THEN 'Apartment to Apartment' ELSE 'Villa to Apartment' END ) END ) END AS TYPE, (SELECT MAX (g.req_date) FROM famis_req g WHERE g.req_date < a.req_date AND g.requestor_id = a.requestor_id AND g.pl_number IN ('002002001', '002002002', '002002003', '002002004') AND g.wo_status = 'CLOSED' GROUP BY g.requestor_id) AS last_move, (SELECT COUNT (g.req_number) FROM famis_req g WHERE g.req_date <> a.req_date AND g.requestor_id = a.requestor_id AND g.pl_number IN ('002002001', '002002002', '002002003', '002002004') AND g.req_status NOT IN ('REJECTED', 'CANCELED') GROUP BY g.requestor_id) AS requests FROM famis_req a JOIN famis_requestor b ON a.requestor_id = b.requestor_id JOIN fam_person c ON b.emp_id = c.person_code LEFT JOIN lease_contact d ON c.person_code = d.contact_id LEFT JOIN lease e ON d.leaseid = e.leaseid LEFT JOIN famis_lease_location f ON e.leaseid = f.lease_code WHERE site <> 'CNAQ1' AND pl_number IN ('002002001', '002002002', '002002003', '002002004') AND (a.enter_date < e.enddate OR e.enddate IS NULL) AND (e.functional_status = 'OCCUPIED' OR e.functional_status IS NULL)Thank you.
It is difficult to read anything not formatted output of the explain plan.
In any case, there is a hughe number of becomes coherent.
I'm just guessing that the reason might be the two groups of subqueries.
You can try to replace them with
1 Inline views or subquery (with article) plants which are connected to the result set
or
2 analysis functions
Here is an example of the latter approach. You can try if this changes something (after make sure you that they lead to correct results).
, max (case when a.wo_status = 'CLOSED' then a.req_date any other purpose) over (partition by a.requestor_id of a.req_date order
range between unbounded preceding and interval "0.1"(seconde précédant) as last_move "."
, count (case when not in a.req_status ('DENIED', 'CANCELLED') then a.req_number any other purpose))
a.requestor_id partition)
-count (case when not in a.req_status ('DENIED', 'CANCELLED') then a.req_number any other purpose))
partition a.requestor_id, a.req_date) as applications
Note that I assume that req_date is of date data type. If it is of type timestamp, the interval should be adapted.
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How to set the content of the website of different size and resolution
I want to know, how to set my Internet site content to display correctly from different sizes and screen resulation.
Please send me an ideal emergency solution please... @
Post edited by: Catherine Rollet
Normally a combination of methods are used to achieve this goal, but media queries are always part of the solution. The basic idea of a media query is:
If the screen is less than 600px wide:
To do this
If the screen is larger 600px, but under 800px wide:
Do something else
If the screen is more than 800 px wide:
Do this thing
Here is an introduction to the media:
http://www.Adobe.com/devnet/archive/Dreamweaver/articles/introducing-media-queries.html
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[ADF, JDev12.1.3] How to set a variable to bind a VO (where clause) in a managed bean?
Hallo,
I have a request based on VO.
The query contains a where clause clause and a bindi variable.
In a managed bean I would like to access the iterator of VO setting the value of the bind variable and read the result.
I found this code it is good start, but I do not know how to set the variable binding.
BindingContext bctx = BindingContext.getCurrent(); BindingContainer bindings = bctx.getCurrentBindingsEntry(); DCIteratorBinding iter = (DCIteratorBinding ) bindings.get("MyVO1Iterator"); iter.execute();You kindly help me?
Also, I would like to know if it is generally advisable to use VO directly in controlled beans or whether it would be best to create in the AppModuleImpl methods that do this and return the result.
In my case for example of the VO will return max 1 plug so I'm in doubt, if the creation of a method in the AM that returns a custom class, which attributes contain values of the line of VO.
Sorry if these questions may seem artificial, but I am a beginner, I have many doubts and so I would be happy to receive some tips regarding best practices.
Thank you
Federico
You can use:
iter.getViewObject().setNamedWhereClauseParam("yourBindVar", value);Note that this approach is used if you have bind variable in the where clause.
To set variables bind to ViewCriteria, you must use VarableValueManager.
This post may be useful for you: binary: how to set the Bind variable values at run time?
Also, I would like to know if it is generally advisable to use VO directly in controlled beans or whether it would be best to create in the AppModuleImpl methods that do this and return the result.
You must set "use VO directly.
For example, from the point of architecture, is probably best to use the method in the model project which will set the bind variable and execute the query.
Or you can use the ExecuteWithParams operation in your the view layer.
In my case for example of the VO will return max 1 plug so I'm in doubt, if the creation of a method in the AM that returns a custom class, which attributes contain values of the line of VO.
Not to complicate your life
All VO lines are represented as ViewRowImpl class if you already have "custom class".
Finally, you can generate your own ViewRowImpl class if it is necessary for this.
Dario
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How to set the attribute in the request of adf defalut search form
I use the default search engine in Jdeveloper 11.1.2.3 with Table query.
I followed this blog to replace the query by default: https://blogs.oracle.com/jdevotnharvest/entry/how-to_tell_the_viewcriteria_a_user_chose_in_an_afquery_component
Question is how to set the value of an attribute in the request. The user will add what ever he wants those who are caught queryEvent I want to add to the value of an attribute that is not displayed to the user and the search engine and it is necessary for the application to run correctly.
Hello
If you went on the blog that I posted, you could get the ViewCriteriaRow of the queryEvent and then you can add the attribute that you want to the ViewCriteriaRow, and then run the query accordingly.
Arun-
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How to set options to generate as Postgresql SQL Analytics
Q: I need to know how to set options in web analytics or the driver BI so that web analytics will be limited to the Postgresql type commands.
Environment: Web analytical running in Windows Exporer. Driver of BI of Oracle running on Windows XP. Tunneling via PuTTY on our own server non-Oracle database.
I heard that somewhere in Oracle BI there is the possibility to activate and disable several features SQL so that Oracle users can capture their SQL generating tools (such as web analytics) to match other DB standards.
Can someone tell me if this is true? If Yes, where can I access these options?Hello
I'm sorry if I could not you, but I understand that you would like to BI Server to build queries depending on the your DB traits.
If this is the case, you can then follow the steps below
1. open .rpd
2. navigate to the physical layer
3. among the different databases, choose the one you want to resolve.
4. right click, choose Properties-> features.
5. here, you can see a number of features of DB that you could try to turn it OFF / ON.
6. you can also perform a DBMS for "query" that will interview your DB.
Hope this is what you are looking for.
Thank you
Diakité -
How authorized optional in the query?
Hello
Database is disconnected during the race under request sparql (query with 9 optional conditions).
I tested the application with 5 in option, its working fine, but his does not work for more than 5 in option.
How authorized optional in the query?
Please advice me for this problem.
Details of error: ORA-03113: end of file on communication channel
SELECT bi, OWNER, name, use, notes, icto, app, ssd, ssdname, ssdid, sdname, sdarchitect, hourly
TABLE (sem_match('{)
? RDF: type bi di: Bulk_Interface.
? BI di: hasBulkInterfaceItOwner? OWNER.
? BI di: hasBulkInterfaceName? name.
? BI di: hasBulkInterfaceRecipientApplicationArea? use.
? BI di: hasBulkInterfaceRecipientFeederType? notes.
? BI di: hasBulkInterfaceSupplierApplicationId? ICTO.
? DS:hasConceptualSourceApplicationIctoId app? ICTO.
? DS:hasConceptualSourceApplication ssd? app.
? DS:hasConceptualSourceSubdomainName ssd? ssdname.
? DS:hasConceptualSourceSubdomainIctoId ssd? ssdid.
? DS:hasConceptualSourceSubdomain sd? SSD.
? DS:hasConceptualSourceDomainName sd? sdname.
? DS:hasConceptualSourceDomainArchitect sd? sdarchitect.
? BI di: hasBulkInterfaceDeliverySchedule? Annex
Optional {? bi di: hasBulkInterfaceRecSet1AverageStorageRequirements? avgsize}
Optional {? bi di: hasBulkInterfaceWorstStorageRequirements? maxsize}
Optional {? bi di: hasBulkInterfaceRecSet1AverageNumberOfRecords? avgrec}
Optional {? bi di: hasBulkInterfaceAverageNumberOfRecords? avgrec}
Optional {? bi di: hasBulkInterfaceRecSet1WorstNumberOfRecords? maxrec}
Optional {? bi di: hasBulkInterfaceWorstNumberOfRecords? maxrec}
Optional {? bi di: hasBulkInterfaceTransferMethodJob? job}
Optional {? bi di: hasBulkInterfaceDataFileAvailability? post}
Optional {? bi di: hasBulkInterfaceBusinessDescription? descr}
}
',
sem_models ('IFM_CURR', 'SRC_CURR'),
SEM_Rulebases ('OWLPRIME'),
sem_aliases (SEM_ALIAS ('di', 'http://www.cse.com/sbip/dwh/mdm/data_interface#'),
SEM_ALIAS ('ds', 'http://www.cse.com/sbip/dwh/mdm/data_sources#'))
NULL));
Let me know if you need further details.
Kind regards
Kouadio.
Published by: 789259 on August 3, 2011 02:01If possible, I would suggest that you upgrade to the latest version: 11.2.0.2.0. It has many bug fixes and improvements.
There is no limit on the number of options by request. I think that the use of the same new variables (? avgrec and? maxrec) in the optional clauses parallel is the reason you see the error in this case special. If you use different variable names the error disappears? If necessary, you can use one coalesce in the external SQL SELECT statement to get the same behavior as before (for example COALESCE them (avgrec1, avgrec2) as avgrec).
Thank you
Matt
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