Fitching a specific number of rows

hi all
i want to fitch a specific number of rows in my query
not all matches (SQL2000 Server )
what command in my sql query can be placed to do so
thanks

set rowcount n

Similar Messages

Select a specific number of rows in query

How can a specific number of rows be selected in a query? For example, a query retrieves 30,000 records and I want to retrieve the output by groups of 5,000. I want the query to retrieve the first 5,000 records, then the next 5,000 records etc. I tried rownum but that does not work.
Thanks,
PANY

Not AGAIN. Please...........
Do you know how to Google? Search forum?
Why do you ask this boring FAQ AGAIN?
Sybrand Bakker
Senior Oracle DBA
Experts: Those who know how to search.

Getting a specific number of rows

Hi,
I would like to know how to get a specific number of rows. For example, I want to page data in my web application, so I'd like to be able to retrieve just 25 rows in my SELECT statement. I searched and I couldn't see anything under the obvious keywords of LIMIT and TOP (as used by other database vendors) so I'm wondering if possible, what do I need to do - a pointer to the relevant documentation would be helpful also.

You can achieve this with rownum
http://download-uk.oracle.com/docs/cd/B19306_01/server.102/b14200/pseudocolumns009.htm#i1006297
Best regards
Maxim

Return specific number of rows depending on the data in a column in table

Hi,
I have a table named orders which has column orderid and noofbookstoorder in addition to other columns.
I want to query the orders table and depending on the value of the 'noofbookstoorder' value return that number of rows.
Eg
Orderid noofbookstoorder
1 1
2 3
3 2
when I query the above data saying
select * from orders where orderid=2;
since it has noofbookstoorders value as 3 the query should return 3 rows and when I query
select * from orders where orderid=3;
it should return 2 rows and
select * from orders where orderid=1;
should return 1 row.
Is it possible to achieve this. If yes, then how do I write my query.
Thanks in advance.

with t as (
           select 1 Orderid,1 noofbookstoorder from dual union all
           select 2,3 from dual union all
           select 3,2 from dual
select t.*
from t,
        table(cast(multiset(select 1 from dual connect by level <= noofbookstoorder) as sys.OdciNumberList))
where Orderid = <order-id>
/For example:
SQL> with t as (
2             select 1 Orderid,1 noofbookstoorder from dual union all
3             select 2,3 from dual union all
4             select 3,2 from dual
5            )
6 select t.*
7    from t,
8          table(cast(multiset(select 1 from dual connect by level <= noofbookstoorder) as sys.OdciNumberList))
9    where Orderid = 2
10 /
   ORDERID NOOFBOOKSTOORDER
         2                3
         2                3
         2                3
SQL> with t as (
2             select 1 Orderid,1 noofbookstoorder from dual union all
3             select 2,3 from dual union all
4             select 3,2 from dual
5            )
6 select t.*
7    from t,
8          table(cast(multiset(select 1 from dual connect by level <= noofbookstoorder) as sys.OdciNumberList))
9    where Orderid = 3
10 /
   ORDERID NOOFBOOKSTOORDER
         3                2
         3                2
SQL> with t as (
2             select 1 Orderid,1 noofbookstoorder from dual union all
3             select 2,3 from dual union all
4             select 3,2 from dual
5            )
6 select t.*
7    from t,
8          table(cast(multiset(select 1 from dual connect by level <= noofbookstoorder) as sys.Odc
iNumberList))
9    where Orderid = 1
10 /
   ORDERID NOOFBOOKSTOORDER
         1                1
SQL> -- And if you want to select multiple orders
SQL> with t as (
2             select 1 Orderid,1 noofbookstoorder from dual union all
3             select 2,3 from dual union all
4             select 3,2 from dual
5            )
6 select t.*
7    from t,
8          table(cast(multiset(select 1 from dual connect by level <= noofbookstoorder) as sys.Odc
iNumberList))
9    where Orderid in (2,3)
10 /
   ORDERID NOOFBOOKSTOORDER
         2                3
         2                3
         2                3
         3                2
         3                2
SQL> SY.
Edited by: Solomon Yakobson on Oct 26, 2009 7:36 AM

Select specific number of rows

i'm listing all data entries in a database.
for that i want to select the 1st ten entires, then the next ten and so on ordered
by date_column.
how can i do that? is it possible with rownum?
in mysql/php i did it with limit
$query = "select * from article where parent_id=0 order by date desc, time desc limit $select, 10";
please email me.
thanks for help
chris

but what about rownum if i want the
records from 10-20?
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by Chen Zhao ([email protected]):
If you are using Oracle 8i, you can use ROWNUM to specify the specific number of records. You can see the ROWNUM by querying:
SELECT *
FROM (SELECT column_name FROM table_name ORDER BY column_name)
WHERE ROWNUM<10
CHEN<HR></BLOCKQUOTE>
null

Specific number of rows within field(s)

I'd like to get Top-N of Amt within Name&Loc as shown below.
Is there a way to reset either COUNT or ROWNUM to get this result?
Name---Loc--(ROWNUM)--Amt
James--abc--------1--1000
James--abc--------2---900
James--abc--------3---750
James--def--------1---500
James--def--------2---300
Jill---abc--------1---400
Jill---abc--------2---150
Jack---xyz--------1--2000
Jack---xyz--------2--1800
Thank you in advance for your help.

try this,
select rownum as rank,ename,sal from ( select ename,sal from emp order by sal desc) where rownum<6
This query works on EMP table of SCOTT user.
If you change "desc" to "asc" it will start from lower to higher values. You can also play with the condition ( rownum < 6 ) to fetch ur desired no. of rows.
Hope this helps,
Kalpen.
<BLOCKQUOTE><font size="1" face="Verdana, Arial, Helvetica">quote:</font><HR>Originally posted by Danielle:
Thanks for the reply, but that's not what I'm looking for.
Is there a way to get the Top-N (top 10,top20...)records within a group of fields (e.g. Name & Loc )?<HR></BLOCKQUOTE>
null

Setting a specific number of rows visiable in a JTable

Hi there,
I am implementing the Master-Detail pattern by using a using a JSplitPane to devide a JPanel into two.
In the upper split-pane I show a JTable as the Master View.
In the lower split-pane I show a JTable as the Detail View.
My problem is that I just want to show 2 (two) rows and the Header in the Detail-View.
The default behavier is that my SplitPane shows 1 and a half row and the tableHeader.
How can I tell the SplitPane that I (only) want two rows and the Header ?

table.setPreferredSize(...);Hi again,
thanks for input !
I tried your suggestion but it did not help me.
    int rowHeight = detailCompareTable.getRowHeight();
    Dimension headerSize = detailCompareTable.getTableHeader().getPreferredSize();
    d = new Dimension ((int) d.getWidth(), (int) (2 * rowHeight + headerSize.getHeight()));
    detailCompareTable.setPreferredSize(d);
   masterDetailSplitPane.resetToPreferredSizes();What am I gettig wrong ?

JTextArea - set specific amount of rows, or characters...

I'm working on a Applet which handles text according to given parameters. One of these parameters sets a JTextArea to the horizontal size of, lets say: 5 rows. What i want is that once this TextArea is set to a specific number of rows no text beyond those rows can be inserted. 5 rows, or a specific amount of characters are allowed.
My problem is that the TextArea wont stop allowing text vertically. The TextArea is visibly set to 5 rows, which doesnt change. But how can i stop text from being inserted beyond row 5?
We have tried a number of different approaches, from trying to set TextArea's size with invisible scrollbars to overriding invalidate()...

I never understand why people want to limit the number of rows in a JTextArea. Add the text area to a scroll pane and scroll bars will appear when the number of rows exceed the display area. The point of using a text area is to allow the user to enter data in a flexible format. If the format is not flexible then maybe you should be using another component or combination of combination of components.
Setting a maximum character size is valid if you intend to store the data on a database with a fixed size field. It is easy to do this by using a custom Document with you JTextArea. Read this section from the Swing tutorial on "General Rules for Using Text Components" for example code on how to do this:
http://java.sun.com/docs/books/tutorial/uiswing/components/generaltext.html
Note, if you really want to limit the text area to 5 lines then count the number of new line characters in the document and don't allow them to enter more than 4.

How to limit the number of rows in a report

I have several reports with a number of parameters - date ranges etc.
Depending on the parameter values selected by the user the reports can return thousands of rows.
I would like to limit the number of rows returned to, say, 500. If more than 500 rows are returned by the query then display an error message requesting that the user enter more specific parameters.
Ideally for performance reasons it would be good to catch the error before the datafile is generated, but I don't know if this is possible. Alternatively a check in the template might do the job - using COUNT on the group?.

Hi Hugh,
In your query, you got to add rowum < 500 or some sort of DB specific limit to the row being returned,
this will help to stop the report to get more than 500 records and the report template wont have any restriction.
or
you can do that in template too, but i would not recommend.
In these both cases or in any case, you cannot give any meaningful error if it exceeds N rows,there is no option like this till now.

Different number of rows for different columns in JTable

hi
I need to create a JTable with different number of rows for different columns...
Also the rowheight should be different in each column...
say there is a JTable with 2 columns... Col1 having 5 rows and column 2 having 2 rows...
The rowHeight in Col2 should be an integer multiple of Rowheight in Col1
how do I do this ??
can anybody send me some sample code ?????
thanx in advance

How about nesting JTables with 1 row and many columns in a JTable with 1 column and many rows.
Or you could leave the extra columns null/blank.
You could use a GridBagLayout and put a panel in each group of cells and not use JTable at all.
It would help if you were more specific about how you wanted it to appear and behave.

How to Efficiently Sample a Fixed Number of Rows

Good afternoon. I need to select a specific number of random rows from a table, and while I believe my logic is right it's taking too long, 30 minutes for a routine data size. Hopefully someone here can show me a more efficient query. I've seen the SAMPLE function, but it just randomly selects rows on a one-by-one basis, without a guaranteed total count.
This is the idea:
INSERT INTO Tmp_Table (Value, Sequence) SELECT Value FROM Perm_Table, DBMS_RANDOM.VALUE;
SELECT Value FROM Tmp_Table WHERE ROWNUM <= 1234 ORDER BY Sequence;I'd need to put the ORDER BY in a subselect for ROWNUM to work correctly, but anyway that's just an illustration. My actual need is a little more complicated. I have many sets of data; each set has many rows; and for each set I need to return a specific (different) number of rows. Perhaps project A has three rows in this table, and I want to keep two of them; project B has two rows, and I want to keep one of them. So I need to identify, for each row, whether it's valid for that project. This is what my data looks like:
Project Person Sequence Position Keeper
A       Bill    1234     1        Yes
A       Fred    5678     3        No
A       George 1927     2        Yes
B       April   5784     2        No
B       Janice 2691     1        YesI populate Sequence with random values, then calculate the position of each person within their project, and finally discard people who's Position is greater than Max_Targets for the Project. Fred and April have the highest random numbers, so they're cut. It's not the case that I'm just trimming one person from each project; the actual percentage kept will range from zero to 100.
Populating the list with random values is not time-consuming, but calculating Position is. This is my code:
UPDATE Tmp_Targets T1
SET Position =
SELECT
   COUNT(*)
FROM
   Perm_Targets PT1
   INNER JOIN Perm_Targets PT2 ON PT1.Project = PT2.Project
   INNER JOIN Tmp_Targets T2 ON PT2.Target = T2.Target
WHERE
       T1.Target = PT1.Target
   AND T2.Sequence <= T1.Sequence
);The Target fields are PKs, and the Project and Sequence fields are indexed. Is there a better way to approach this? I could write a cursor that pulls out project codes and performs the above operations for each project in turn; that would be logically simpler and possibly faster. Has anyone here addressed a similar problem before? I'd appreciate any ideas.
This is on 9.2, in case it matters. Thank you,
Jonathan

You've not given any indication of how max targets for a given project is determined, so for my example I'm using the ceiling of 1/2 of the number of records in each project which gives the same number of yes and no responses per project as you had:
with dta as (
select 'A' project, 'Bill' person from dual union all
select 'A', 'Fred' from dual union all
select 'A', 'George' from dual union all
select 'B', 'April' from dual union all
select 'B', 'Janice' from dual
), t1 as (
select project
       , person
       , row_number() over (partition by project order by dbms_random.value) ord
       , count(*) over (partition by project) cnt
       , rownum rn
    from dta
select project
     , person
     , ord
     , cnt
     , case when ord <= ceil(cnt/2) then 'Yes' else 'No' end keep
from t1
order by rn
PROJECT PERSON ORD                    CNT                    KEEP
A       Bill   2                      3                      Yes
A       Fred   3                      3                      No
A       George 1                      3                      Yes
B       April 1                      2                      Yes
B       Janice 2                      2                      No
5 rows selectedIn this example I use an analytic function to assign a random ordering for each record within a project in the middle query, in the final output query I am determining the yes no status based on the order within a project and the count of records in the project. If you had a table of projects indicating the thresh hold you could join to that and use the thresh hold in place of the ceil(cnt/2) portion of my inequality in the case statement.

ORA-01422 exact fetch returns more than requested number of rows on invoice

Hello developer,
Current I m facing problem ORA-01422 exact fetch returns more than requested number of rows in Invoce Standard form when we select PO_Default invoice type for some specific PO Number not for all. I m not able to handle the error bcoz im new in oracle apps. it's urgent for user requirement. Plz guide me how to take approch to handle the situation.........
select Po_Default invoice type=>enter po number=>press ok button=>got error ORA-01422
I got query from POST_QUERY TRIGEER like
function get_po_number (l_po_number varchar2,l_vendor_id OUT number) return number is
l_po_header_id number;
--Bug fix:1096002
--Removed the function call UPPER from the WHERE clause so that the query
--becomes case sensitive.
-- BUG 2519682 vendor_id added in the Select statement and futher in the fetch statement
cursor po_number_cursor is
SELECT po_header_id,vendor_id
FROM po_headers
WHERE type_lookup_code IN ('STANDARD', 'BLANKET', 'PLANNED')
AND approved_flag = 'Y'
AND segment1 = l_po_number
-- Bug 2289727. Enhanced Matching Controls to Finally Closed POs
AND (NVL(closed_code, 'X') <> 'FINALLY CLOSED'
OR :parameter.show_final_closed_po_flag = 'Y')
AND PCARD_ID IS NULL; --bug4627502
/* Commented out since this is not relevant even if executed.
AND (segment1 LIKE SUBSTR(l_po_number, 1, 2) || '%' OR
segment1 LIKE SUBSTR(l_po_number, 1, 1) ||
SUBSTR(l_po_number, 2, 1) || '%' OR
segment1 LIKE SUBSTR(l_po_number, 1, 1) ||
SUBSTR(l_po_number, 2, 1) || '%' OR
segment1 LIKE SUBSTR(l_po_number, 1, 2) || '%' );
begin
open po_number_cursor;
fetch po_number_cursor INTO l_po_header_id,l_vendor_id;
close po_number_cursor;
return(l_po_header_id);
end get_po_number;
plz help me how to resolved this issue it's urgent.
thanks in advance.........

This bug is documented in the following note on metalink.oracle.com
APXINWKB - Creating PO Default Invoice Errors with ORA-01422 Exact Fetch Returns More Than Requested Number Of Rows [ID 946578.1]
The solution is to apply patch 8765847.
Hope this answers your question,
Sandeep Gandhi

Number of Rows in a Tree

I think this should have a fairly simple answer, but I can't find it for the life of me. Is there somehow I can obtain the total number of rows in a tree control? With a listbox you can use the Property node "ItemNames" and just use an Array Size, but Tree Controls don't seem to have anything similair. Any ideas? Am I missing something simple?
Michael

Hi miguelc,
If nothing else miguel, this forum specifically answered how to get tree structure sizes. Happy programming.
Brian K.

How can I get a fixed number of rows on a SELECT?

I'm interested on get the last xx records of one specific query that returns an higher number of rows than xx. How can I do this?

you can use "where rownum < xx" if you
write "select * from (select ... from ... order by ...) where rownum < 10"
but you can't write "rownum > 10" because no record will be returned.
therefor you have to do like this:
select * from (select ..., rownum as nummer from (select ... from ... order by ...)) where nummer > 10
~
pascal

Need to limit number of rows returned by a query

Hi. Is there a way to limit the rowsets returned to me in a query? I need to get the first 100, then the next hundred, etc until there are no more rows left to retrieve. Someone told me that I should use a cursor to do this. Does anyone have a specific example? Can this be done with a combination of SQL/JDBC?
Thanks in advance...bbetta
null

if you are talking about limiting the number of rows to be returned to the calling program to a managable number of rowa ...
for example the result set size would be 5000 rows and you want to get them in batches of 50 or 100 ..
see the attached link :
JDBC Code Templates
http://technet.oracle.com/sample_code/tech/java/sqlj_jdbc/htdocs/templates.htm#BatchSize
if you want the server side transaction to only return the first 50 or 100 rows even though the result set has more ... then
another approach is required -- possibly as suggested above ...

Fitching a specific number of rows

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