Order by before rownum
I am trying to select top 200 records from a really complex select query with order by. But Oracle does top 200 first then order by if I put rownum and order by in one select query, which will give me top 200 records redomly every time. I know a way to work around is doing following
select * from (select................ order by ......) where rownum<=200
but this will really take long time since the inner select query is big one. it joins 15 some tables to get all informations. I know in MS SQL, you can have select top(200)...... ordery by ...., it will do order by then top 200. This is making query running really fast.
Is there other ways to make this run faster in Oracle. Possiblely puting oder by and rownum<200 in one select query?
Thanks!
Edited by: user4916474 on Jan 14, 2011 8:24 AM
Hi,
See these threads for the information you need to post when you have a performace issue:
When your query takes too long ...
HOW TO: Post a SQL statement tuning request - template posting
If you have a complicated query involving 15 tables, the solution is likely to be complicated, too. For example, you might need to find the top 200 rows before joining all the tables, so just looking for an alternative to ROWNUM probably won't help all by itself, though it may be part of the overall solution.
One alternative to ROWNUM is the analytic ROW_NUMBER function:
SELECT *
FROM (
SELECT ...
, ROW_NUMBER () OVER (ORDER BY ...) AS r_num
FROM ...
WHERE r_num <= 200
;It might not be faster than ROWNUM, but it's probably not slower, either, and it can be adapted to other requirements (e.g., the top 200 for each department).
Similar Messages
-
WMS : How to Process Sales Order Released before Turning on WMS
Hello Gurus,
How to process sales orders released before WMS enable flag is turned on in the new WMS enviournment in Oracle 11.5.10 ?Helios,
Thanks for the document.
I m looking for how to perform Pick confirm transactions for already printed Pick slips before WMS enabled flag is turn on for the org.
One option is to close all the deliveries but if there is no on hand at that point the they will remain option.
Other option is to Back order those deliveries and re release them post wms enable flag is turned on... The only issue i see here is that if there are more new orders for one of the items and the orders are released then which orders will get allocated/reserved if there is limited on hand quantity to statisfy the SO need.
Let me know if you can think off some alternative solution.
Apprecite help !!
Thanks,
Sam -
Get purchase order number before saving
Hi All,
I am working on Purchase order Creation.
I want to know the purchase order number before it was saved.
I have used NUMBER_GET_NEXT function Module.But it is based on Number range.
I dont want to get based on Number Range.
I want to get the Get next number based on the Documnet TYpe.
Is there any possiablity to get that.If yes please let me know.
Thanks,
Swapna.Hi,
data : lv_ebeln type ebeln.
Select single MAX( EBELN ) from EKKO into LV_EBELN.
Next PO Number = LV_EBELN + 1.
Try this.
This will work if maintain only one number rage object for PO Number.
Thanks,
Durai.V -
Order phone before my upgrade?
My upgrade is available on November 18. I want the iPhone 6 64gb in space grey, and it says it should ship by Nov 21. Is there a way to order the phone before my upgrade is available, but still pay the upgrade price since I won't have it until after my upgrade, to make sure that I have it asap? My current phone is broken and I decided to wait for my upgrade so I could get the 6. Baiscally, I want to order it before my upgrade to make sure it still ships on the 21st and doesn't get pushed back further.
I am sorry to hear about your current device, bwolve. Do you have an alternate device to activate? Orders now for the iPhone 6 64GB Space Grey are shipping by 11/21 and you can choose overnight shipping option. This date is subject to change so can't be guaranteed your order would ship by that time.
Sincerely,
YaleK_VZW
Follow us on Twitter @VZWsupprt -
Order printout before realse and after relase
hi
all
order printout before realse and after relase
is this possibile
it gives message teco not done
my client wants in preparation and after relerase
though iknow no logic is there but they stick to this
thanks
manojhi
i think you can print the order after the releasing of order or at the time of put in process.
kindly refer the following [link|http://help.sap.com/saphelp_erp60_sp/helpdata/en/5b/ae36044b8611d182ba0000e829fbfe/content.htm]
regards
thyagarajan -
How to get sales order number before saving in VA01 by using parameter
Hi,
Please let me know how to get sales order number in transaction VA01 before saving it by using parameter in SU3.
I tried to set parameter in SU3 "AUN", but it is not working as required, means sales order number is not appearing before saving.
can you please suggest how to do it?
Thanks & Regards.
Rahul VerulkarHi,
In case of Support project, we get the high severity issues from users and needs to be closed withn 2 hours... so what we do we get the requirement from user and checking the same in production from our id, but we can not save the sales order as we are not authorized to do the same, so in such cases it is required to get the sales order number before saving... where we can guide the users.... but actuallly it is not getting saved in the table until and unless u save it manually. It works like a material master... when u create material master, the material number appears in advance in material number field "MATNR"
If it is possible can you please suggest step by step to work on parameter in SU3 for sales order number before saving.
Thanks & regards,
Rahul Verulkar -
Modify purchase order item before to save
Hi all,
I'm trying to modify EKPO-RETPO field from purchase order item before save it.
I've done it in the user exit: EXIT_SAPMM06E_013, but I've seen it coudl be use for update customer fields.
Anybody knows which user exit can I use to do that?
Thanks in advance.
Pat.Hello,
You can use the BADI *MEPROCESS_PO_CUST* to suffice the requirement.
In this structure IM_ITEM has field RETPO. Please pass value to it
Hope this will help.
Thanks
Eswar -
How to block order confirmation, before issue of raw materials?
Dear Frndz,
My client would like to block order confirmation, before issue of raw materials.Also, they do not want to use backflush concept.Pls help me out with the step by step process.
Regards,
SriniSrinivasan,
You can think of using available user exits which are listed below,
CONFPP01 PP order conf.: Determine customer specific default values
CONFPP02 PP order conf.: Customer specific input checks 1
CONFPP03 PP order conf.: Cust. specific check after op. selection
CONFPP04 PP order conf.: Customer specific input checks 2
CONFPP05 PP order conf.: Customer specific enhancements when saving
CONFPP06 PP Order Confirmations: Actual Data Transfer
CONFPP07 Single Screen Entry: Inclusion of User-Defined Subscreens
Please take help from your ABAP consultant.
Hope this helps you.
SmanS -
Order by, cursor, rownum
i want to select 10 database entires
from an 8i database with the selector variable and sort the entries by a date
column.
but the problem is that my sql statement
(see below) selects first the entries
and then the entries get ordered.
what i need is first the entries ordered
and then the select. otherwise it is possible
that i get on the next page with the next
10 entries that this entries may be with a date that should be on the prev. page.
has anyone an idea?
thx
SELECT *
FROM (SELECT col1,
col2
FROM table
WHERE ROWNUM < (selector + 10)
MINUS
SELECT col1,
col2
FROM table
WHERE ROWNUM < selector)
ORDER BY TO_DATE (col2, 'DD.MM.YYYY HH24:MI');In Oracle 8i, the general format for this sort of "top-n" analysis is:
SELECT column1, column2, ROWNUM
FROM (SELECT column1, column2
FROM table_name
ORDER BY top_n_column DESC)
WHERE ROWNUM <= number_of_rows;
Applying that to this situation, the query would be something like:
SELECT col1, col2, ROWNUM
FROM (SELECT col1, col2
FROM table
ORDER BY TO_DATE(col2, 'DD.MM.YYYY HH24:MI') DESC)
WHERE ROWNUM <= 10;
When you put the ORDER BY clause in a sub-query as above, the ORDER BY is applied before the numbering of the rows, so the pseudo-column ROWNUM has some meaning and usefulness.
However, for those of us who are still using versions prior to Oracle 8i, we can't have an ORDER BY clause in a sub-query; It will generate a somewhat confusing error about a missing parenthesis. Therefore, the pseudo-column ROWNUM has no meaning or usefulness. So, prior to Oracle 8i, for "top-n" analysis, the general format is something like this (It will also still work in 8i):
SELECT outer.column1, outer.column2
FROM table_name outer
WHERE number_of_rows >=
(SELECT COUNT (*) + 1
FROM table_name inner
WHERE inner.top_n_column > outer.top_n_column)
ORDER BY outer.top_n_column DESC;
Applying that to this situation, the query would be something like:
SELECT outer.col1, outer.col2
FROM table outer
WHERE 10 >=
(SELECT COUNT (*) + 1
FROM table inner
WHERE TO_DATE(inner.col2,'DD.MM.YYYY HH24:MI') > TO_DATE(outer..col2,'DD.MM.YYYY HH24:MI'))
ORDER BY TO_DATE(outer.col2,'DD.MM.YYYY HH24:MI') DESC;
A lot of people keep asking for queries to select the first few or last few rows entered in a table, without ordering by a specific column (for what purpose I am not sure). It is a common mistake to attempt to use ROWNUM for this purpose. However, ROWID is assigned an incremental value upon input, not upon ordering or retrieval, like ROWNUM. Therefore, the pseudo-column ROWID can be used as a comparison column for the same sort of "top-n" analysis like this:
For the first n rows:
SELECT outer.column1, outer.column2, ROWID
FROM table_name outer
WHERE n >=
(SELECT COUNT (*) + 1
FROM table_name inner
WHERE inner.ROWID < outer.ROWID)
ORDER BY ROWID;
For the last n rows:
SELECT outer.column1, outer.column2, ROWID
FROM table_name outer
WHERE n >=
(SELECT COUNT (*) + 1
FROM table_name inner
WHERE inner.ROWID > outer.ROWID)
ORDER BY ROWID DESC;
If you are only attempting to retrieve one row, with or without a comparison column, then you can use things like MIN, MAX, NOT IN, NOT EXISTS, and set operators to find that one row.
I have seen a lot of confusion on this topic and I hope this explanation was thorough enough to help clarify it for some.
null -
Hello,
My query has an Order By statement (order by tblA.Name) .
When the query runs this is the order the records come out:
1) All records that have a space in the first byte of their Name field.
2) All records whos name begins with a special character like: #1 Italian Restuarant.
3) All records whos name begins with a numeric like: 21 Club
4) and finally all Alpha records....A - Z.
Now if I only want to select the first 300 rows, (still using the same Order By). In my Where clause I put (oracle):
and RowNum < 300.
When the query runs I get this order:
1st) Alpha records....A - Z.
Can anyone explain what to do about this?
Thanks for your time!Hi,
In any single query, ROWNUM is assigned before ORDER BY is applied.
If you want just the opposite, do the ORDER BY in a sub-query and the ROWNUM in its super-query:
WITH ordered_rows AS
SELECT * -- or whatever
FROM tbla
ORDER BY name
SELECT *
FROM ordered_rows
WHERE ROWNUM <= 300; -
Third Party Sale order Billing Before Before MM Billing
Hi,
In our company case . we are not dependent for MM billing . Our Sale order billing is independent and it's on the daily bases.
i have done following changes
item category to TAS
VoV7 'TAS' Billing Relevance to 'B' Relevant for order-related billing - status according to order quantity
VTFA (Order,to,bill,copying,control)
But when i am doing SD Billing VF01
error messages:
Message no. VF17 Document 15000962 does not contain any items with open quantities
Message no VF147 1015000962 000010 No open billing quantity has been determined
plz resolve this problem
regard
khurramwe don't want to Depend upon MM. Because, we have to update our customers ledger with creation of Sale order and PR.
What does it mean by don't want to depend upon MM?
How the vendor delivery the goods if you create only PR ? with ref to PR vendor delivery the goods?
PR is not a legal document unlike PO which is legal document, in standard with ref to PO , MIGO MIRO are created.
Also you mentioned
note: Vender send us hard copy of desptaches after one week. so with that we invocie our PO.
After one week how does the PO comes into picture will you create PO with ref to PR after dispatch notification comes to you after one week by vendor then you do MIGO and MRIO?
Please note : In 3rd party sales we have two kinds of process.
1. 3rd party sales with out shipping notification( this is SAP standard, settings already available no need any changes)
Here we do the customer invoice after vendor payment only...
2. 3rd party sales with shipping notification(here we need to do small changes as i mentioned above)
in the process you need not to wait till the vendor payment(MIRO), as per your requirement you can bill the customer before vendor payment(MIRO)...But here MIGO is mandatory.However it is dummy MIGO( no inventory updates).
Actualy , we don't want to Depend upon MM. Because, we have to update our customers ledger with creation of Sale order and PR.
Beacuse we want to update our customer ledger on daily bases.
Let us assume you are creating customer invoice with ref to sales order and in your case you mentioned you won't do MIGO or MIRO before customer invoice creation so in this case for how much qty you bill the customer on daily basis?
If the vendor delivery goods lesser qty than order qty then how do you manage with out doing MIGO or MIRO?
Please answer the above questions?
You may able to create customer invoice with ref to order with out MIGO or MIRO by changing some copy control but you can't bill the exact qty to the customer if you don't do MIGO or MIGO.
So i suggest you to go with 3rd party sales with shipping notifications .
Here sale order( VA01)
PO (with ref PR).
MIGO( dummy MIGO)
VF01( customer invoice)
MIRO( vendor payment)
thanks,
Srinu. -
Using order by and rownum in massive tables
Hi,
I need to retreive paginated and ordered data from a big table.
I know some different tips using rownum or the RANK() function and subqueries, these tips work well for small amount of data, but I need to get the data from a table with 200.000 entries (not under my control), and with all those methods is necessary to order first the data and then select your range, so performance is extremely poor.
Anybody knows a better solution? it doesn't matter if is plain SQL(better) or PL/SQL.
Thanks in advancebut I was looking for something like the LIMIT in MySQL or TOP in msSQL where all the sorting is made internally and it's really fast If the data needs sorting, I do not think Oracle would take any longer to do that than the others mentioned, unless the other DBs mentioned, only sort the rows that are actually being returned.
As for the LIMIT clause, Oracle already has that clause available when FETCHing from a CURSOR:
SQL> DECLARE
2 CURSOR emp_cur IS
3 SELECT * FROM scott.emp;
4 TYPE emp_rec_table IS TABLE OF emp_cur%ROWTYPE INDEX BY BINARY_INTEGER;
5 emp_tbl emp_rec_table;
6 BEGIN
7 OPEN emp_cur;
8 LOOP
9 emp_tbl.DELETE;
10 FETCH emp_cur BULK COLLECT
11 INTO emp_tbl LIMIT 5;
12 EXIT WHEN emp_tbl.COUNT <= 0;
13 dbms_output.put_line(emp_tbl.COUNT || ' rows fetched using LIMIT clause.');
14 END LOOP;
15 CLOSE emp_cur;
16 END;
17 /
5 rows fetched using LIMIT clause.
5 rows fetched using LIMIT clause.
4 rows fetched using LIMIT clause.
PL/SQL procedure successfully completed.
SQL> disconnect
Disconnected from Oracle9i Enterprise Edition Release 9.2.0.3.0 - Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.3.0 - Production
SQL> -
Order BY with ROWNUM in Select List
Hi,
I have query like bellow for Oracle 11g:
create table em_c (vl_s_ec int,id_em_em int,id_empcre_ecr int, id_em_ec int);
create table em (id_em_em int)
Select e.id_em_em
, NVL(
(SELECT * FROM(SELECT a.vl_s_ec FROM em_c a WHERE a.id_em_em = ec.id_em_em
AND a.id_empcre_ecr < ec.id_em_ec order by a.id_em_ec DESC) WHERE ROWNUM <= 1) ,0) AS col2
FROM em_c ec
INNER JOIN em e on ec.id_em_em = e.id_em_em
WHERE 1 = 1;
But inner subselect doesn't see table "em_c ec" from outer FROM clause. That's why following error occurs:
SQL Error: ORA-00904: "EC"."ID_EM_EC": invalid identifier
Please help me to make it work.
Edited by: user11290901 on Dec 17, 2010 2:11 AMCorrelation names only go one level deep. It's a bit tough to decipher your query so if you want a better response please post the following:
1. Oracle version (SELECT * FROM V$VERSION)
2. Sample data in the form of CREATE / INSERT statements.
3. Expected output
4. Explanation of expected output (A.K.A. "business logic")
5. Use \ tags for #2 and #3. See FAQ (Link on top right side) for details. -
[urgent]Planned Order generated before Purchase Order
hello to all,
Good day.
I currently have an issue with Planned order being generated before a Purchase Order.This is visible via MD04. Can you explain why this is happening? Normally the Planned Order should be generated after a Purchase Order.
Thanks.Hi Vishal,
I think you did not get my point.
There was a PO created today - this PO will be on January 2008 (example). Then after the MRP runs, a planned order was created having to be executed on December of 2007. How is this possible? And into MD04, I can see Exception number 30 for the Planned Order entry.
Thanks. -
Order by AND rownum in a function?
I have a table with articles sorted by an id. In the table is also a date field to tell when the article is written.
I want a query that returns the 20 latest articles, and this is what i have come up with:
SELECT * FROM (
SELECT articleid,writtendate
FROM articles
ORDER BY writtendate desc)
WHERE ROWNUM < 21;
This works alright, BUT I want it in a function! There it doesnt compile!!! Anyone got any suggestions?
I have tried to separate the stuff, like first sorting the records in a view and then selecting the top 20 after that. I could try a cursor and fetching out of that, but havent suceeded with that either.
Bye!ok, the sql statement works perfectly in an sql editor, but wont compile in a function.
FUNCTION fnc_getLatest20 (
cur IN OUT pkg_cursor.refcur
)RETURN pkg_exception.return_type IS
BEGIN
OPEN cur FOR
SELECT * FROM (
SELECT articleid,writtendate
FROM articles
ORDER BY writtendate DESC)
WHERE ROWNUM < 21;
RETURN pkg_exception.err_none;
END;
The best I have is that either the rows returned in the cursor is all rows, ordered correctly or the top twenty in some other order.
I most be on the wrong track here, there has to be some easier way of doing this...
BTW, thanks for the help so far.
Maybe you are looking for
-
Webi report on top of dervied tables
Hi Team, We are going to work on a migration work from Discoverer to BO 4.1. As per my understanding in discoverer each tab in a report has a SQL query (We have oracle as DB) which will be used to build that tab. Same for the next tab, it will have i
-
Installing Windows 8.1 on Macbook pro retina
can i install winodws 8.1 on macbook pro retina with superdrive?is it works?
-
I am unable to create an Action to Export from .ai to .psd. The steps in the Action such as Open and Export seem inextricably linked to the file from which the original Action was recorded. The steps in the Action do not seem to be generalized comman
-
This excuse that consumes a lot of battery unconvincing, until the android supports flash.
-
Quark 6.5 crashes when opening existing files on iMac Intel Core Duo
I just switched from a G4 titanium laptop to an Intel iMac and Quark works fine except when I try to open a file that I created on the laptop (same Quark 6.5). It crashes. I talked to Quark and they said that I need to open the files on a PC and resa