How to show a fixed number of rows in JTable

Hi,
I have to show only a fixed number of rows in the table .
After scrolling number of rows must not be changed.

I don't understand the question.
The number of visible rows is dependent on the size of the scroll pane.
Scrolling does not change the number of rows that are visible.

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How to display a fixed number of rows in a page when using CL_GUI_ALV_GRID

Hy experts
How to display a fixed number of rows in a page when using CL_GUI_ALV_GRID?? lets say 500 ?? because my display table it may contain in some cases 10.000 and evidently I can t see all of them..
I have a button in my toolbar witch triggers this event
(display 500 records ) but I don t have the logic to do this only with methods of CL_GUI_ALV_GRID.
can you tell me a standard method of CL_GUI_ALV_GRID witch can help me do this?? any hint will be good..
Till now I was used to add a column to my structure witch represents a flag that is a number corresponding to every 500 records (a batch containing 500 records )
first       500 - flag -> 1
second 500 - flag -> 2
etc..but I m convinced that exists a way of doing this more easy..without damaging my structure..
thanx in advance..don t be shy..reply if you have any hints..

Hi,
if method SET_FILTER_CRITERIA doesn´t help, I think that you must work with 2 internal tables, a counter and a loop for filtering the records to be displayed:
case counter.
when 1.
     loop at int_table1 from 1 to 500.      "<-- your table with all records
       move int_table1 to int_table2
    endloop.
when 2.
     loop at int_table1 from 501 to 1000.
       move int_table1 to int_table2
    endloop.
etc, etc.
Call grid-->SET_TABLE_FOR_FIRST_DISPLAY
   exporting
     IT_OUTTAB = int_table2                "<-- instead of your currently table int_table1

3 queries, how to make it fixed number of rows

Hi. I have the 3 queries with the following structure. Q1 customer, Q2 sales order, Q3 lines in the sales orders
Q1
Q2
Q3
Q3
Q2
Q1
I followed the one suggested in thread: Can you limit returned rows in a loop?
regarding value for each text form field as follows
text1 = <xsl:variable name="lpp" select="number(5)"/>
text2 = <?for-each@section:LIST?> <xsl:variable xdofo:ctx="incontext" name="group" select=".//LINES"/>
<?for-each:$group?><?if:(position()-1) mod $lpp=0?><xsl:variable name="start" xdofo:ctx="incontext" select="position()"/>
text3 = <?for-each:$group?><?if:position()>=$start and position()<$start+$lpp?>
text4 = <?LINE?>
text5 = <?end if?><?end for-each?>
text6 = <?sum($group[(position()>=$start) and (position()<($start+$lpp))]/LINE)?>
text7 = <?if:not(count($group) mod $lpp=0) and ($start+$lpp>count($group))?>
text8 = <?end if?><?end for-each?><?end if?>
text9 = <?if:count($group)<$start+$lpp?>
text10 = <?end if?>
text11 = <xsl:if xdofo:ctx="inblock" test="$start+$lpp<=count($group)"><xsl:attribute name="break-before">page</xsl:attribute></xsl:if>
text12 = <?end if?><?end for-each?><?end for-each?>
and it worked for me if i have only 2 queries. but now when im using it in 3 queries. how to apply the said format in involving 3 queries?
Thanks.

Hi,
if method SET_FILTER_CRITERIA doesn´t help, I think that you must work with 2 internal tables, a counter and a loop for filtering the records to be displayed:
case counter.
when 1.
     loop at int_table1 from 1 to 500.      "<-- your table with all records
       move int_table1 to int_table2
    endloop.
when 2.
     loop at int_table1 from 501 to 1000.
       move int_table1 to int_table2
    endloop.
etc, etc.
Call grid-->SET_TABLE_FOR_FIRST_DISPLAY
   exporting
     IT_OUTTAB = int_table2                "<-- instead of your currently table int_table1

Fixed number of rows in ADF table

Can we specify fixed number of rows for ADF table so even no rows displayed it will still show 10 empty rows.

the rangesize property determines how many rows will be displayed and controls paging. If there are no rows to begin with (if I understand the question correctly) rangesize won't have any effect.

How do I limit the number of rows retrieved at a time using RefCursor?

I have a PL/SQL package in use, that returns a REF CURSOR. This is currently being used in a Forms 6i application. Now I want to develop an ASP.NET web application that displays exactly the same information as my Forms 6i module. In fact those two applications will be used concurrently for a while.
I looked at the sample code provided on otn.oracle.com and decided to use the OracleDataAdapter.Fill()-method to fill a dataset and bind that dataset to a pageable GridView. Now I wonder, whether this method retrieves ALL records of the query at once and how I can limit the number of rows fetched? The Select statement retrieves up to 10000 rows at a time. Most of the time, a user is only interested in the first 20-30 rows. Forms 6i fetches more rows as the user scrolls down, how can I implement the same behavior in ODP.NET?
- Markus

Excuse me, but the reply does not quite answer my question. Maybe I did not explain my concerns clear enough:
I understand the use of the two properties (RowSize and FetchSize) to reduce the amount of round trips needed to transfer the data - not the number of rows fetched in total. This would still lead to a situation where all rows are transferred, when I am using the OracleDataAdapter.Fill()-Method. Is this correct or did I misunderstand the function of this method?
I quote the otherwise really helpful article you send me:
Of course, there is a cost if the fetch size is arbitrarily large. More client-side memory and processor cycles will be needed to store and manage a larger amount of data. The goal is to find a high-performing balance between the number of round trips and the amount of data retrieved per trip.
My RowSize is for sure a bit larger than the one in the given example. The query will probably be used by up to 100 users at a time, so I would like to limit the resource-costs not only on the network by the number of round trips, but also on the web-server which is storing all these records in it's memory per user-request.

How can I limit the number of rows returned by a select stat

How can I limit the number of rows returned by a select
statement. I have a query where I return the number of stores
that are located in a given area.. I only want to return the
first twenty-five stores. In some instances there may be over
200 stores in a given location.
I know is SQL 7 that I can set the pagesize to be 25....
Anything similiar in Oracle 8i?
null

Debbie (guest) wrote:
: Chad Nale (guest) wrote:
: : How can I limit the number of rows returned by a select
: : statement. I have a query where I return the number of
: stores
: : that are located in a given area.. I only want to return the
: : first twenty-five stores. In some instances there may be
: over
: : 200 stores in a given location.
: : I know is SQL 7 that I can set the pagesize to be 25....
: : Anything similiar in Oracle 8i?
: If you are in Sql*Plus, you could add the statement
: WHERE rownum <= 25
: Used together with an appropriate ORDER BY you
: could get the first 25 stores.
Watch out. ROWNUM is run before ORDER BY so this would only
order the 25 selected
null

How can I limit the number of rows in Oracle?

Hi All,
I am using very complex query where I join 6 table to fetch data from database.
I have requirement like fetching a first 10000 row and then fetching another records after 10000 and so on.
I just want to know how to fetch a limited number of rows using sql query. Moreover, I also want to know how to calculate the total number of row (alternative of count method because I don't want to query the database twice because its affect the performance).
Thanks in advance.
Regards,
Sunny

sunny@oimnewbie wrote:
Hi All,
I am using very complex query where I join 6 table to fetch data from database.
I have requirement like fetching a first 10000 row and then fetching another records after 10000 and so on.
I just want to know how to fetch a limited number of rows using sql query. Moreover, I also want to know how to calculate the total number of row (alternative of count method because I don't want to query the database twice because its affect the performance).
Thanks in advance.
Regards,
SunnyThis smells like a very fishy requirement based on a fundamental misunderstanding of how Oracle works. Could you explain why you want to arbitrarily limit the result set to 1000 rows? What will happen between that and getting the "next" 1000? What triggers getting the "next" 1000? and how do you define "next", since there is no ordering in a heap table.
I suspect we can make that requirement go away be presenting a better approach to the real issue.

How do you set the number of rows in a spreadsheet, so that even when you drag data in, in writes over those rows instead of adding a new row?

How do you set the number of rows you want in a spreadsheet, so that even when you drag data in, in writes over those rows instead of adding a new row?

After the discovery reported above, I filed this report :
Bug ID# 10073038
Summary:
When Numbers is used on a system with decimal comma a csv file may be good AND wrong
Steps to Reproduce:
With Numbers v2, you introduced an interesting enhancement.
In system using the comma as decimal separator, Numbers requires csv files using the semi-colon as values delimiter.
In fact it’s true if we OPEN the document dragging its icon on Numbers one or thru the open dialog.
This said.
(1) Drag and drop a csv built with the 'semi-colon' standard on a table or on a sheet
(2) Drag and drop a csv built with the 'comma' standard on a table or on a sheet
Expected Results:
Every normally constituted user assume that in
case (1) he will get a perfectly built table
case (2) he will get every cells of a row in a single cell
Actual Results:
In fact you forgot the drag and drop way of use and in
case (1) every values separated by semi-colon are inserted in a single cell
case (2) values separated by comma are correctly spread in a table
isn’t it ridiculous ?
Regression:
Except looking in QuickView to see which is exactly the structure of the file to decide the way we will insert it in a Numbers document, we may use an applescript fair enough to replace the semi-colons by TAB characters
or
to replace the commas by TABs and the decimal periods by commas
Notes:
While I am on this subject, I wish to make two proposals:
(1) It would be fine to format the date according to the ISO format year-mm-dd when you export a Numbers doc to csv.
Doing that, dates would be imported correctly in every countries.
At this time, on an English system, you export as mm/dd/year.
If the doc is open on a system using the format dd/mm/year, the results will be odd.
On a system using the format dd/mm/year, you export this way and so, if the doc is open on a system using the format mm/dd/year the results are odd too.
As every localized versions accept the ISO format (at least on entry), using it in the export scheme would give a correct behavior everywhere.
(2) It would be fine to add the format Tab Separated Values in the Export pane.
TSV + ISO date format would give documents opening flawlessly everywhere.
Yvan KOENIG (VALLAURIS, France) dimanche 4 septembre 2011 21:27:41
iMac 21”5, i7, 2.8 GHz, 4 Gbytes, 1 Tbytes, mac OS X 10.6.8 and 10.7.0
My iDisk is : <http://public.me.com/koenigyvan>
Please : Search for questions similar to your own before submitting them to the community

Create spreadsheet file with a fixed number of rows

What is the most straight forward way to create a series of spreadsheet files each with a new file name and fixed number of rows. We have a data acquisition process that creates a new 1D array every 2 seconds. We'd like to build a series of spreadsheet files each having two hours or 3600 rows of data. Is there a best way to do this in LV9?
john

Use the low-level FileI/O Vis with Write to Text File.vi where you open a new file with every N iteration like this:
You just have to convert your 1D Array to string before.
If you would like to have a new file every N hours you should create a FGV which checks the elapsed time using Get Date/Time in Seconds.vi, which is more appropriate for longtime applications.
Christian

How do you return the number of Rows in a ResultSet??

How do you return the number of Rows in a ResultSet? It's easy enough to do in the SQL query using COUNT(*) but surely JDBC provides a method to return the number of rows.
The ResultSetMetaData interface provides a method for counting the number of columns but nothing for the rows.
Thanks

No good way before JDBC2.0. u can use JDBC2.0 CachedRowSet.size() to retrieve the number of rows got by a ResultSet.

How can i now the number of rows afected by the last query?

how can i now the number of rows afected by the last query?
For example:
i made this update :
update trl_trial set status = 1 /* Validation */
where trial_id = cobject_id
and status = 0; /* Initial */
if NUMBERS_OF_ROWS = 0 then
end if;
how can i do this?
thank u!!!!

how can i now the number of rows afected by the last query?
For example:
i made this update :
update trl_trial set status = 1 /* Validation */
where trial_id = cobject_id
and status = 0; /* Initial */
if NUMBERS_OF_ROWS = 0 then
end if;
how can i do this?
thank u!!!! Do the following :
update trl_trial set status = 1 /* Validation */
where trial_id = cobject_id
and status = 0; /* Initial */
if(SQL%ROWCOUNT = 0 ) then
else
end if;
you can also declare a variable and do
myvar := SQL%ROWCOUNT;
SQL%ROWCOUNT returna the # of rows afected by any sql
statement, like DELETE, UPDATE

Urgent******how can i get the number of rows enterd by the user in a table

Hi Frndz..
As per my requirement i need to do the validations for the multipple rows in a table that was enterd by the user,
               T
          The prob is how can i get that number of rows that enterd by user,
       WDMessageManager msg = wdComponentAPI.getMessageManager();
     String col1= "";
     String col2= "";
     double col3= 0;
     double col4= 0;
     double amount= 0;
     int nodesize = wdContext.nodeTest().size();
     try
     for(int i=0; i<=2 ; i++)
               col1 = wdContext.nodeTest().getTestElementAt(i).getCol1();
             //msg.reportSuccess("col1 size is :"+col1);
               col2 = wdContext.nodeTest().getTestElementAt(i).getCol2();
               col3 = wdContext.nodeTest().getTestElementAt(i).getCol3();
               col4 = wdContext.nodeTest().getTestElementAt(i).getCol4();
                amount = wdContext.nodeTest().getTestElementAt(i).getAmount();
          if(col1 == "" )
                    msg.reportException("Plz fil the col1 for line:",true);
               break;
          else
          if(col2 == "" )
                              msg.reportException("Plz fil the col2 for line:",true);
                         break;
                    else
          if(col3 <= 0)
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               break;
          else
               if(col4 <= 0)
               msg.reportException("Plz fil the col4:",true);
               break;
          msg.reportSuccess("skvgjhdfgasdfgsjkafguisafisenvtvyeriy");
                                                   wdThis.test();
     catch (Exception e)
               msg.reportException("strMessage in catch block",true);
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Regards
Rajesh

Hi,
   You can try this:
* Let's say the table's datasource is a node called Table and it has two attributes first & second.
* You want to check if any of these attributes has been changed by the user or not. If they have been
* changed then you want to do some validations against them.
int sizeOfTable = wdContext.nodeTable().size();
for(int i = 0; i < sizeOfTable; i++){
     IPrivate<view name>.ITableElement ele = wdContext.nodeTable().getTableElementAt(i);
     if(ele.isChangedByClient(ITableElement.<attribute name>)){
        //value has been changed, do some validation. You can get the row index using ele.index().
Regards,
Satyajit.

How do you limit the number of rows return from query?

How do you limit the number of rows return from query? Do all databases support this kind of feature?

i think the standard is limit
to get the top 30
select * from mytable LIMIT 30;returns the first 30 rows
also if you want a range
select * from mytable LIMIT 10,30;returns 30 rows starting from 10
this last one is useful for displaying ranges... something similar happens in these forums when viewing topics and messages

How do find out the number of rows

how to find out the number of rows of as all tables in a schema with one sql statement

Hi,
What u can try doing is...
declare
numrows number;
begin
for i in (select tname from tab)
loop
execute immideate 'select count(1) into numrows from ' | | i.tname ;
dbms_output.put_line(numrows);
end loop;
end;
Hope this helps. This works only in 8i. So if u need to do the same in 8.0 u have to use dbms_sql pkg.
The logic is same but the way u open ands execute the code is a bit diff.
Best Of Luck.
Regards,
Ganesh R

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.

How to show a fixed number of rows in JTable

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