Please help to solve the problem with Incerements
Hi all, hope you can help.Basically I have a stored procedure that adds the someones preferences of room on a table.
The PK of tables is the (ck_Application_no, ck_preference_no) together.
Depending on how preferences a person chooses, ck_preferenceno is assumed to start at 1 and increment by 1 then. So, here is a typical example of a State of people.
CK_APPLICATION_NO - CK_PREFERENCE_NO - FK_BED_SPACE
7942------------------------------10--------------------------------HOWLES
7942------------------------------11--------------------------------TUDSTE
7942------------------------------12---------------------------------PARSPE
7942------------------------------13--------------------------------CLESPE
7942------------------------------14--------------------------------HOWSPE
7944------------------------------1-----------------------------------PARSPE
7944------------------------------2-----------------------------------CLESPE
10---------------------------------1------------------------------------BINSTA
10---------------------------------2------------------------------------MMASTE
10---------------------------------3------------------------------------MMASTE
This process worked without problem for a year, but all of a suddon sometimes strange, the CK_PREFERENCE_NO has not increment properly (as you can see for CK_APPLICATION_NO 7944 and 10) are accurate.
but 7942 began with 10 for some reason any? :-/
Cleaning this error!
I need to focus on the issue, but I need first to clean these erros like there aren't has more than 1,000 files on 200 separate requests with the incorrect increment.
Can I run some kind of LOOP to browse this table and change the ck_PREFERENCE_NO under each separate APPLICATION (ck_application_no)) to start at 1 e.t.c.
Thus, for example, the above table I want to look like this:
CK_APPLICATION_NO - CK_PREFERENCE_NO - FK_BED_SPACE
7942------------------------------1--------------------------------HOWLES
7942------------------------------2--------------------------------TUDSTE
7942------------------------------3--------------------------------PARSPE
7942------------------------------4--------------------------------CLESPE
7942------------------------------5---------------------------------HOWSPE
7944------------------------------1--------------------------------PARSPE
7944------------------------------2--------------------------------CLESPE
10----------------------------------1--------------------------------BINSTA
10----------------------------------2--------------------------------MMASTE
10----------------------------------3--------------------------------MMASTE
Any help would be amazing.
Hello
It is surprising that you have spent any amount of time without problems. It is very difficult to keep a column like ck_preference_no updated. Many people woudn't even try; they simply have a unique constraint on (ck_application_no, ck_preference_no), and, when they need to convert these numbers consectuive integers (1, 2, 3,...) use ROW_NUMBER.
If you really want to update the table, you can use ROW_NUMBER in the same way. For example:
MERGE INTO table_x dst
USING (
SELECT ROWID AS r_id
, ROW_NUMBER () OVER ( PARTITION BY ck_application_no
ORDER BY ck_preference_no
) AS new_preference_no
FROM table_x
-- WHERE ... -- if wanted
) src
ON (src.r_id = dst.r_id)
WHEN MATCHED
THEN UPDATE
SET dst.ck_preference_no = src.new_preference_no
;
I hope that answers your question.
If this isn't the case, post a small example of data (CREATE TABLE and only relevant columns, INSERT statements) for the table such that it exists today, with the ck_preferrence_nos bad and also poster the expected result of these data, words, the contents of the table after it is corrected.
Explain, using specific examples, how you get these results from these data.
Always tell what version of Oracle you are using.
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< SireRegistryNo > 43199794 < / SireRegistryNo >
< NameofDam > LANGFORDS LADY 2206 AND < / NameofDam >
< DamRegistryNo > 43315143 < / DamRegistryNo >
< > 4107 tattoo < / tattoo >
< SecondaryTattoo / >
< UniversalIDNumber > 1194F018 < / UniversalIDNumber >
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< Secondary_Tattoo_Location / >
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< ValidationComment / >
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< > 18475 DocumentID < / DocumentID >
< ClubName > Perrin FFA < / ClubName >
Hamman < name > < / LastName >
< FirstName > Charles < / name >
< email > [email protected] < / email >
< setting > hammam, Charles < / Exhibitor >
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< UniversalIDNumber > 1194F015 < / UniversalIDNumber >
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< Secondary_Tattoo_Location > TATTOO - right ear < / Secondary_Tattoo_Location >
< OracleBreedID > 6389 < / OracleBreedID >
< JrValidationBreedName > Polled Hereford < / JrValidationBreedName >
< ValidationDate > 2014 - 12-01 T 11: 56:00 - 06:00 < / ValidationDate >
Hannah < ValidatedBy > < / ValidatedBy >
< ValidationComment / >
< / JrShowCustomerHeifers >
< / DocumentElement >
< / diffgr:diffgram >
< / DataTable >
user12021633 wrote:
Regarding your suggestion, I've never used the syntax of FLWOR. I'll try to implement if I can make it work.
"FLWOR is the abbreviation of ' for Let's where Order by Return" and refers to the full form of an XQuery query expression.
Do you think it would be faster than the way I have the values?
You have used a FLWOR expression (the 'for' + 'return' part of it) in this post: Re: Please help to read the XML with XMLTable
And I have already said: do not use in this case.
Faster or slower isn't the point. Oracle will evaluate the expression in the same way.
But from a maintenance point of view, it's obviously much easier to use a simple XPath expression like this:
/DT:GetJrShowCustomerHeifersResponse / dt:GetJrShowCustomerHeifersResult / dg:diffgram/DocumentElement/JrShowCustomerHeifers
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