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

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.

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

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

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

Getting a specified number of rows froma query

How can I get the minimum 3 row from a query after a order by in the select
Eg;
SELECT ROWNUM,ROWID, connection_id, GROUP_ID
FROM prov_pending_commands
ORDER BY group_id
4     AAAZWTAAYAAANMiAAA     680932     32702947
3      AAAZWTAAYAAANMgAAB     644610     32703643
2 AAAZWTAAYAAANLrAAB     51925942 32704602
1 AAAZWTAAYAAANLrAAA     61247803 32704613
I need to get only the group ids 32702947,32703643, 32704602 for some other processing.
I checked by getting rownum or row id, but after ordering it gives wrong data
Please need help

Hi,
Try this,
select * from (select name, row_number() over (order by name) as row_num from test) row_num
where row_num <= 3
If you are looking for something else explain us more with sample output.
Thanks!
M T

How to get the total number of rows in result set?

Using JDBC and mysql

There is no method to directly obtain the count of the resultset.
int count = 0;
while( rs.next() )
count++;
}Another way,
Use a [Scrollable ResultSet|http://java.sun.com/j2se/1.4.2/docs/api/java/sql/ResultSet.html]
stmt = conn.createStatement(ResultSet.TYPE_SCROLL_INSENSITIVE, ResultSet.CONCUR_READ_ONLY);
//Get the resultset
rs.last();
rs.getRow();

Getting a fixed number of rows from various items

Hello,
I am new to Oracle and I am having a hard time resolving this problem. I will try to explain as best as possible.
The application requires that I build a list of items that have been shipped. As they may have various shipping companies, there may be various tracking numbers for each item shipped. The application requires that I get a list of the items that have been shipped that meet certain criteria, then for each item, list the first three tracking numbers that are found. If the shipped item has more than three tracking numbers, the others beyond the third are ignored. I built a SELECT statement using the rownum "column" to limit my result set to a maximum of three. My intention was to build a list of
item ids, then pass those to a stored procedure, then loop for each item id, getting the first three tracking numbers. The tracking numbers returned would be appended to a cursor, which would return the entire set of tracking numbers for the list of item ids.
Any recommendations as to how to approach this requirement would be greatly appreciated. I have gotten through the SELECT that returns the list of item ids. I am having trouble finding the correct approach to getting the three tracking numbers for each item id. One solution was to have the application cycle through each
item id, but I am hoping that this can be done within the stored procedure so that it is called only once for the returned list of item ids.
I wish to thank you in advance. This is all the information I can provide, as I don't have any DDL statements. I hope it will suffice.
Salvador
null

Please see if you can use something like this:
SELECT a.item, a.tracking_number
FROM table_name a
WHERE 3 >=
(SELECT COUNT (*) + 1
FROM table_name b
WHERE a.item = b.item
AND b.ROWID < a.ROWID
AND b.criteria = 'whatever')
AND a.criteria = 'whatever'
ORDER BY a.item, a.tracking_number
For example, if you have a table named items_shipped that has columns named item, tracking_num, and shipped, and you want all the items that meet the criteria that shipped = 'Y' and the first three tracking_nums for those items, then your query would look something like this:
SELECT a.item, a.tracking_num
FROM items_shipped a
WHERE 3 >=
(SELECT COUNT (*) + 1
FROM items_shipped b
WHERE a.item = b.item
AND b.ROWID < a.ROWID
AND b.shipped = 'Y')
AND a.shipped = 'Y'
ORDER BY a.item, a.tracking_num
You have given very limited information. If the above suggestions are not sufficient, please provide your table structure, including table names, column names, data types and lengths, some sample data, what criteria must be met, and a sample of what you would like the output to be.
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 ?

Get number of rows in ResultSet object

Can anybody guide me on how to get the total number of rows in a result set object without iterating through all rows? Thanks.

Hi Soon,
You mention that you want to get the row count without iterating through the "ResultSet". I don't know what database you are using, but I want to inform you that with my Oracle 8i (8.1.7.4) database, using JDK 1.3.1 and the matching JDBC (thin) driver, the implementation of the "last()" method (that others have recommended that you use), actually iterates through the whole "ResultSet".
What I do is first execute a "SELECT COUNT(1)" query (using a literal "1") to get the number of rows -- this is much faster than executing the "last()" method.
Then I execute my actual query.
Hope this helps you.
Good Luck,
Avi.

How to determine the number of rows of data in a datatable?

I have a datatable that I fill from an SQL query. I do not know exactly how many rows of data it will return (due to my selection criteria) but will be somewhere between 100 and 300 rows. I send this data into a report but need to determine the length of the report (panel height data member) programatically based on how much data the query has returned. So, I need a way to count how many rows are filled in the data table.
I tried doing a nested "if" statement checking the value of each cell but when I tested the expression at 59 "if" statements (will need 300+) I got a parser error in lookout when I tried to accept the connection. I also tried a type of loop by assigning cursor.2 either to its own value (circular) or to its own value plus one depending on the value of the cell at cursor.2. It was close but overshot by one row or more (much more sometimes).
Any clever ideas? Perhaps I have just been looking at this problem too long. Thanks, in advance, for your help.

Since the datatable gets the data from the SQL query, you can also use the SQL statement to count the number of rows in the query result.
For example, in datatable you do "select localtime, trace1 from intdata where xxx". You can get the count by "select count(trace1) from intdata where xxx". Use the same condition in order to get the same number of rows.
Maybe another SQLExec object is needed to do the count.
Whenever the datatable executes the SQL, the SQLExec executes and return the count.
Ryan Shi
National Instruments

Webi report - save as .csv is bringing double the number of rows.

Hello all,
I am running a webi report and then saving it as .csv file to my desktop but when I save the file it is giving me double the number of rows. In my report I have employee, employee key, attributes and Org unit and some measures.
The .csv file has one additional column at the end which does not have any header and that column has "1" in the rows which should be legitimate and "0" in the rows which are so called duplicates, in these duplicate rows there is all data except it is missing the employee key and org unit key.
If I save as excel I get the right number of rows.
has any one seen this issue before?
Thanks in advance,

Exporting to csv is different from exporting to csv.
If you have any filter on your crosstab or table and you export it to excel it will show you your data according to this filter. Let's say in your table you have amount 0 and 1 and you filter that column so it will show only those records where amount = 1. If you export it to excel you'll get what you see in your WebI report, that's only records with amount = 1.
But if you export to csv the same Webi report with the same crosstab or table filtered by amount=1, the csv export will ignore this filter and your csv will include amount 0 and amount 1 records.
I don't know if that's a WebI's bug, but that's what has happened to me.
A workaround could be adding your filter directly in the query pane, not filtering your table columns.
Also check your query pane to see what object is bringing that extra column in your table.

Number of rows in last fetch when array festching?

Hi!
I know it must be somewhere, but I'm unable to find it in the documentation:
In OCI 8.1 how can I get the actual number of rows fetched in the last call to OCIStmtFetch() when array fetching?
E. g. when I have a buffer that can hold 100 column values and the select statement returns 140 rows, the second call to OCIStmtFetch() will only fill 40 items into the buffer. So the code processing the fetched rows should only iterate to 40 and not to 100. Is there a way to get this number with OCIGetAttr()?

here's an example -
orc = OCIAttrGet((dvoid *) stmthp_cur, (ub4) OCI_HTYPE_STMT,
(dvoid *) &rows, (ub4 *) &sizep, (ub4)OCI_ATTR_ROWS_FETCHED,m_errhp);

Getting a specific number of rows

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