Number of rows returned by Rownum

Similar Questions

• How to limit the number of rows returned in a query

  Hi friends,
  I want to limit the number of rows returned by my request to some 10 lines. How to do this. When I try to make some 6 rows with the rownum < 10 its giving results for a particular Department and that too only... btw I'm bundling my table and includes much a table joins and will order the results of the table by a column... How to do this...

  Run it:

  select * from (your query goes here) where rownum < 10
  

  Nicolas.

• Count the number of rows returned from each view in USER_VIEWS

  For each USER_VIEWS view, I would return the name, creation date, last modified dateand the number of rows returned by this view.
  
  Here's what I have so far:
  

  col object_name format a20
  select 
  object_name, 
  created, 
  last_ddl_time
  from user_objects
  where object_type = 'VIEW'

  Returns:
  

  OBJECT_NAME          CREATED   LAST_DDL_TIME
  -------------------- --------- -------------
  AISLE_AVG            11-FEB-12 11-FEB-12     
  COURSE_AVG           11-FEB-12 20-FEB-12     
  EXE_12_VIEW          11-FEB-12 21-FEB-12     
  L1_P2                17-FEB-12 17-FEB-12     
  L1_P3                17-FEB-12 17-FEB-12     
  L1_P4                17-FEB-12 17-FEB-12     
  L1_P5A               17-FEB-12 17-FEB-12     
  L1_P5B               17-FEB-12 17-FEB-12     
  LAB3_1A              12-FEB-12 20-FEB-12     
  LAB3_1B              12-FEB-12 20-FEB-12     
  LAB3_2A              12-FEB-12 20-FEB-12     
  LAB3_2B              12-FEB-12 20-FEB-12     
  LAB5_1               19-FEB-12 19-FEB-12     
  LAB5_2               19-FEB-12 19-FEB-12     
  LAB5_3               19-FEB-12 19-FEB-12     
  LAB5_4               19-FEB-12 19-FEB-12     
  LAB5_5               19-FEB-12 19-FEB-12     
  LAB5_TIMES           19-FEB-12 19-FEB-12     
  LAB6_1               19-FEB-12 19-FEB-12     
  LAB7_VIEW            20-FEB-12 20-FEB-12     
  PROGRAMS             11-FEB-12 21-FEB-12     
  STUDENT_GPA          11-FEB-12 21-FEB-12     
  
   22 rows selected 

  How can I add a last column that counts the number of rows returned by this view?
  
  EDIT - here is a dump of my paintings, and here are my views.
  
  Edit2 - this is possible by using the DECODE function, by chance?

  The function...

  CREATE OR REPLACE FUNCTION view_row_count (view_name VARCHAR2)
  RETURN NUMBER
  AS
  retval NUMBER;
  BEGIN
  EXECUTE IMMEDIATE
  'select count(*) from '||view_name INTO retval;
  RETURN retval;
  END view_row_count;
  /
  

  And now the query...

  select
  object_name,
  created,
  last_ddl_time,
  view_row_count(object_name) as view_row_count
  from user_objects
  where object_type = 'VIEW'
  

• total number of rows returned, how to learn it

  Hello
  I think that in Oracle should be some simple var which contains the number of rows returned, can someone help me with this.
  I actually do it:
  INSERT INTO TT_1 SELECT * FROM TT_2 WHERE COND_01.
  
  Here so get the total number of rows populated without COUNT (*) extra.
  
  
  TX
  TR

  If you want to see in PL/SQL you can do it like this:

  SQL> set serveroutput on
  SQL> create table t1 as select * from all_tables where 1 = 0;
  
  Table created
  SQL> BEGIN
    2    INSERT INTO t1 SELECT * FROM all_tables;
    3    dbms_output.put_line('Rows inserted: ' || SQL%ROWCOUNT);
    4  END;
    5  /
  
  Rows inserted: 2238
  
  PL/SQL procedure successfully completed
  
  SQL> 
  

• How to write a function to estimate the number of rows returned SQL?

  How to write a function to estimate the number of rows returned SQL through SQL Execution Plan?
  My idea is
  Call dbms_sql.parse to create the SQL PLAN, then ask the PLAN for the number of estimated return lines.
  But how to get SQL plan through "id cursor?
  Thank you.

  You can use EXECUTE IMMEDIATE to explain plan statement. About the STATEMENT_ID generation, it could be anything. Even a SYSTIMESTAMP cast as TANK would work.

• Determine the number of rows returned by a cursor

  I have a problem when I need to use slightly different logic based on whether or not a cursor returns a single line or multiple lines. I know you can use % ROWCOUNT to determine the number of rows returned far+, but it's not really help me because I need to know this information before I start to do any treatment.
  
  
  In other words. How can I know the number of rows returned by a cursor without actually iterate through the entire thing.
  
  I'm looking for something like this:
  

     Cursor ReqCursor(pi_cert_id IN Varchar2) Is
        SELECT course_id cid, grade g
          FROM requirements
         WHERE cert_id = pi_cert_id;
     c_ReqCursor ReqCursor%Rowtype;
  
  Open CertCursor(p_cert_num);
      Loop
          Fetch CertCursor
            INTO c_CertCursor;
          Exit When CertCursor%Notfound;
          
          If c_CertCursor%NumOfRows > 1 THEN
              Case A;
          Else
              Case B;
          End If 
     End Loop
  Close CertCursor;

  For your business add

   SELECT course_id cid, grade g, count(*) over() Tot_Rows
          FROM requirements
         WHERE cert_id = pi_cert_id;
  --"Fetch 1st row and you will know if the cursor has more than 1 row"
  

  HTH
  SS

• How to limit the number of rows returned in the PIF

  Hi friends...
  How to restrict the no of lines displayed from a few 10 rows for example... at the BEEP

  If its in RTF, you can use position to restrict.
  <><11]?>

  You can also restrict the it in your sql query using ROWNUM.

• Count the number of rows in a table (s)

  Hi all

  I have a TKT_PRIORITY_LK table that I want to count the number of rows returned by a priority level... say Low, Medium, High, critical. I want to be able to count how many of each created are they, instead returning ID instead, if making any sense... Can you please help with this.

  Example; Select count (*) in TKT_PRIORITY_LK

  PRIORITY group

  Kind regards

  Sandrine

  Try this

  Select a.PRIORITY, count (*) from TKT_PRIORITY_LK a, TKT_TICKET_MAIN b

  where a.id = b.PRIORITY_ID

  A.PRIORITY group

• Error creating a salary. ORA-01422: exact fetch returns more than the requested number of rows in the hr_maintain_proposal_swi procedure insert_salary_proposal package

  Hi all

  We try to add new proposal for a salary of some employees from form August 1, 2015 (the Date of the beginning of employee)

  There is no existing salary proposal doesn't exist for these employees.

  We get below error.

  
  

  ORA-01422: exact fetch returns more than the requested number of rows in the hr_maintain_proposal_swi procedure insert_salary_proposal package

  
  

  Help, please.

  Thank you

  Tarun

  Hi John,.

  If it helps, take a look at the following note:

  ORA-01422 exact Fetch returns more than number of lines requested in Hr_maintain_proposal_swi (Doc ID 1673527.1)

  Kind regards

  Rajen

• Limit the number of rows retrieved

  We have the need to limit the number of rows retrieved in a table for some users.
  
  We tried to put this by adding a policy that limits the number of rows. Here is the code:
  
  
  create or replace function
  usu01_access_policy
  (obj_schema varchar2, obj_name varchar2) return varchar2
  is
  d_predicate varchar2 (2000);
  Start
  If the user = "PEPE01" then
  d_predicate: =.
  "rownum < 11';
  on the other
  d_predicate: =.
  ' 1 = 1' ;
  end if;
  Return d_predicate;
  end;
  
  This code works well when you query the table like this:
  
  Select * from usu01;
  
  the number of rows retrieved is 10.
  
  But when we define a clause 'where' the query does clause 10 recovered lines before, getting only the lines of the first 10 with the condition 'where' = true.
  
  Is there a way to limit the number of retrieved rows from a table, but by first applying the 'where' clause to the whole table and later the ' rownum < limit ' condition?
  
  Thank you

  Why do you limit the number of lines of output? It is a customer number, not a database problem, I would say.
  Which should be resolved within the query itself. Using rownum without orderly subquery also return different results on each run.
  Take a look here for top - N query: http://www.oracle.com/technetwork/issue-archive/2007/07-jan/o17asktom-093877.html

  Nicolas.

• How to determine the number of rows in the database and save the result to a local variable?

  Hello

  I'm a newbie in the use of TestStand, databases and SQL, and now I've met difficulties. I use TestStand 2014 (32 bit).

  I have a need to know the number of rows in a database and save that number in a local variable. I tried to practice using the database of the Types of step provided with TS. I tried to use the following in a SQL statement:

  Locals.NumberOfRows = ("SELECT COUNT (*) FROM TEST_TABLE")

  It returns an error: specified value is not the expected type. My goal is possible in this way, or I'm doing this completely wrong?

  -RautSa

  Thank you for your response, Norbert. I have a database of who wins new values at random, and sometimes I need the exact number of rows in this table.

  I managed to achieve my goal by using the SQL statement: "SELECT COUNT (*) as Rowcount OF TEST_TABLE", followed by a data GET operation, which records that number of lines in a local variable.

  -RautSa

• Export of DataPump API - number of rows exported using

  Hello

  I'm working on the procedure to export data in the table before deleting the partition. It will be run by the Scheduler of the data, that's why I want to run the datapump job using the API.

  I wonder, if it is possible to get the number of rows exported. I would compare with the number of rows in a partition before you delete the partition.

  
  

  Thank you

  Krystian

  Hello

  Don't know exactly how you want the number of rows per partition that have been exported, but here are a few ideas:

  1. create a log file by using 'add_file ':

  -Add a log file

  dbms_datapump.add_file (h, ' DEPTJOB.log ', a', NULL,)

  dbms_datapump.Ku$ _file_type_log_file);

  It is also in my example included below.  Here is the content after the DEPTJOB.log workload (situated in Oracle Directory object would be "in my example):

  $ cat /tmp/DEPTJOB.log

  Departure 'SCOTT '. "" DEPTJOB ":

  Object type TABLE_EXPORT/TABLE/TABLE processing

  Processing object type TABLE_EXPORT/TABLE/TABLE_DATA

  . . "exported"SCOTT" DEPT': 'SYS_P1581' 5,929 KB 2 lines

  . . "exported"SCOTT" DEPT': 'SYS_P1582' 5,914 KB 1 lines

  . . "exported"SCOTT" DEPT': 'SYS_P1583' 5,906 KB 1 lines

  Table main 'SCOTT '. "' DEPTJOB ' properly load/unloaded

  ******************************************************************************

  Empty the files together for SCOTT. DEPTJOB is:

  /tmp/Dept.dmp

  Job 'SCOTT '. "" DEPTJOB "managed to 00:00

  You can then review or extract the information from the log file.

  2. save the master table and the query for the busy lines.

  Use the parameter "KEEP_MASTER":

  -Keep the main table to be deleted after employment ends

  dbms_datapump.set_parameter(h,'KEEP_MASTER',1);

  Here's my example, the request to the main table is at the end.

  $ sqlplus scott/tiger @deptapi

  SQL * more: version 12.2.0.0.2 Beta on Fri Jan 22 12:55:52 2016

  Copyright (c) 1982, 2015, Oracle.  All rights reserved.

  Last successful login time: Friday, January 22, 2016 12:55:05-08:00

  Connected to:

  Database Oracle 12 c Enterprise Edition Release 12.2.0.0.2 - 64-bit Beta

  With the options of partitioning, OLAP, advanced analytics and Real Application Testing

  Connected.

  SQL > SET FEEDBACK 1

  SQL > SET 10 NUMLARGEUR

  SQL > SET LINESIZE 2000

  SQL > SET TRIMSPOOL ON

  SQL > SET TAB OFF

  SQL > SET PAGESIZE 100

  SQL > SET SERVEROUTPUT ON

  SQL >

  SQL > Rem save on the old table of scott.dept

  SQL > dept and rename it dept_old.

  Renamed table.

  SQL >

  SQL > Rem re-create it with partitions

  SQL > CREATE TABLE dept (deptno NUMBER varchar (14) dname, loc varchar (13)) PARTITION INTO 3 PARTITIONS HASH (deptno)

  2.

  Table created.

  SQL >

  SQL > Rem fill the dept table

  SQL > insert into dept select * from dept_old;

  4 lines were created.

  SQL >

  SQL > Rem now create datapump job export SCOTT. DEPT. using the API

  SQL > DECLARE

  2: NUMBER;         -Handle Datapump

  3 jobState VARCHAR2 (30);   -To keep track of job status

  4 ind NUMBER;         -Index of the loop

  5 the ku$ _LogEntry;   -For error messages and work in PROGRESS

  6 js ku$ _JobStatus;  -The State of the work of get_status

  7 jd ku$ _JobDesc;    -The get_status job description

  8 m ku$ _Status;     -The status returned by get_status object

  9 sql_stmt VARCHAR2 (1024);

  nom_partition 10-VARCHAR2 (50);

  11 rows_completed NUMBER;

  12

  BEGIN 13

  14-

  15 run the Installer based on the operation to perform.

  16-

  17 h: = dbms_datapump.open ('EXPORT', 'TABLE', NULL, 'DEPTJOB', NULL);

  18 dbms_datapump.add_file (h, 'dept.dmp', 'd', NULL,

  dbms_datapump.Ku$ _file_type_dump_file 19, 1);

  20

  21    --- Add a logfile                                                         

  22 dbms_datapump.add_file (h, ' DEPTJOB.log ', a', NULL,)

  23 dbms_datapump.ku$ _file_type_log_file);

  24

  25 dbms_datapump.metadata_filter (h, 'SCHEMA_EXPR', ' IN ("SCOTT") ");

  26 dbms_datapump.metadata_filter (h, 'NAME_LIST', "'DEPT"');

  27

  28

  29-

  30 start work.

  31-

  32 dbms_datapump.set_parameter (h, 'SILENT', 'banner');

  33

  34 -keep the main table to be deleted after employment ends

  35 dbms_datapump.set_parameter(h,'KEEP_MASTER',1);

  36

  37 dbms_datapump.start_job (h);

  38

  39-

  40 - run to grabbing the output of the job and write in the output log.

  41-

  42 jobState: = "UNDEFINED";

  43 WHILE (jobState! = "COMPLETED") AND (jobState! = "STOPPED")

  44 LOOP

  45 dbms_datapump.get_status (h,

  dbms_datapump.Ku$ _status_job_error 46.

  dbms_datapump.Ku$ _status_wip 47, -1, jobState, m);

  48

  49      --

  50. If we received messages WIP or error for the work, display them.

  51      --

  52 IF (BITAND(sts.mask,dbms_datapump.ku$_status_wip)! = 0)

  53 THEN

  54: = sts.wip;

  55 ON THE OTHER

  56 IF (bitand(sts.mask,dbms_datapump.ku$_status_job_error)! = 0)

  57 THEN

  58: = sts.error;

  59 ON THE OTHER

  the 60: = NULL;

  61 END IF;

  62 END IF;

  63

  64 the IS NOT NULL IF

  65 THEN

  66 ind: = the. FIRST;

  67 then AS ind IS NOT NULL

  68 LOOP

  69 dbms_output.put_line ((ind). LogText);

  70 ind: = the. Next (IND);

  LOOP END 71;

  72 END IF;

  73 END LOOP;

  74

  75-

  76 - release work.

  77-

  78 dbms_datapump.detach (h);

  79

  80-

  81. all exceptions that spread at this point will be captured.

  82 - the details are extracted from get_status and displayed.

  83-

  EXCEPTION OF 84

  85, SO THAN OTHERS THEN

  BEGIN 86

  87 dbms_datapump.get_status (h,

  dbms_datapump.Ku$ _status_job_error, 0-88,.

  89 jobState, sts);

  90 IF (BITAND(sts.mask,dbms_datapump.ku$_status_job_error)! = 0)

  91 THEN

  the 92: = sts.error;

  93 the IS NOT NULL IF

  94 THEN

  95 ind: = the. FIRST;

  96 although ind IS NOT NULL

  LOOP OF 97

  98 dbms_output.put_line ((ind). LogText);

  99 ind: = the. Next (IND);

  100 END LOOP;

  101 END IF;

  102 END IF;

  103

  BEGIN 104

  105 DBMS_DATAPUMP. STOP_JOB (m, 1, 0, 0);

  EXCEPTION OF 106

  107. WHEN OTHER NULL THEN;

  END 108;

  109

  110 EXCEPTION

  111, SO THAN OTHERS THEN

  112 dbms_output.put_line ('ORA-00000: an unexpected exception during ' |)

  113 ' Manager of exceptions. ' ||

  114 ' sqlcode = ' | TO_CHAR (SQLCODE));

  END 115;

  END 116;

  117.

  Departure 'SCOTT '. "" DEPTJOB ":

  Object type TABLE_EXPORT/TABLE/TABLE processing

  Processing object type TABLE_EXPORT/TABLE/TABLE_DATA

  . . "exported"SCOTT" DEPT': 'SYS_P1581' 5,929 KB 2 lines

  . . "exported"SCOTT" DEPT': 'SYS_P1582' 5,914 KB 1 lines

  . . "exported"SCOTT" DEPT': 'SYS_P1583' 5,906 KB 1 lines

  Table main 'SCOTT '. "' DEPTJOB ' properly load/unloaded

  ******************************************************************************

  Empty the files together for SCOTT. DEPTJOB is:

  /tmp/Dept.dmp

  Job 'SCOTT '. "" DEPTJOB "managed to 00:00

  PL/SQL procedure successfully completed.

  SQL >

  SQL > table main query Rem for number of lines completed

  SQL > column nom_partition format a10

  SQL > format 9999 column lines

  SQL > SELECT nom_partition, COMPLETED_ROWS FROM SCOTT . DEPTJOB WHERE BASE_OBJECT_NAME = "DEPT";

  PARTITION_ COMPLETED_ROWS

  ---------- --------------

  SYS_P1581 2

  SYS_P1583 1

  SYS_P1582 1

  3 selected lines.

  SQL >

  SQL > "EXIT";

  3. you might even extract information of the call from the command line:

  $ sqlplus scott/tiger @deptapi.sql | grep 'exported ' | AWK ' {print "Table:" $4, 'charge' $7, $8} '

  Table: 'SCOTT '. "" DEPT ":"SYS_P1581"loaded 2 rows

  Table: 'SCOTT '. "' DEPT ': 'SYS_P1583' loaded 1 lines

  Table: 'SCOTT '. "' DEPT ': 'SYS_P1582' loaded 1 lines

• number of rows in the table

  Hi master,

  I have a requirement. During the passage of a table, I need to get the number of rows in this table. Sometimes, when I spend 2 or more table names, I need to get the same count of result of lines. I got the below function. but it shows all the rows in the table. I want pariticular tabels only. How I can I get it.

  Select table_name, num_rows from all_tables where table_name in ('EMP', 'Department');  I tried.  I need to a procedure or function. who will pass the name of the table as a parameter and 1 or more than the name of a table if I pass, I need to display information from table name and number of lines.

  CREATE OR REPLACE

  TYPE t1_obj AS OBJECT)

  table-name VARCHAR2 (30),

  CNT NUMBER

  )

  /

  CREATE OR REPLACE

  TYPE t1_obj_tbl AS THE t1_obj TABLE

  /

  CREATE OR REPLACE

  FUNCTION (f1)

  p_schema_name VARCHAR2

  )

  RETURN t1_obj_tbl

  PIPELINED

  IS

  v_retval t1_obj: = t1_obj (null, null);

  BEGIN

  FOR v_rec IN (SELECT table_name FROM dba_tables where owner = upper (p_schema_name) and nvl (iot_type, 'X')! = "IOT_OVERFLOW") LOOP

  v_retval.table_name: = v_rec.table_name;

  RUN IMMEDIATELY "SELECT COUNT (*) FROM" | p_schema_name | '.' || v_rec.table_name

  IN v_retval.cnt;

  PIPE ROW (v_retval);

  END LOOP;

  RETURN;

  END;

  Select * from table (f1 ('scott'));

  The above function returns information from the table in SCOTT scheama. I need only perticular table info.

  Please notify.

  AR.

  Hi Sven,

  Front end people ask me the requirement. They wanted a proc or function as I want.

  Please help me.

  Concerning

  AR

• Get the number of rows in the oracle table

  Hi all
  I want to get the total number of rows in the sql to the appmodule table.
  After you apply the criteria to view some on the view object. If he try with getallrowsinrange the number of rows found within the viewobject was but I want a total number of rows in the sql table.
  
  How can I get that
  
  I use jdev 11.1.1.5
  
  Thanks in advance

  I threw something together, quick and dirty, don't hesitate to optimize.

  Assuming you want the County table, I put the code in a subclass of EntityDefImpl since it is representing a table in the middle tier.

  public class EmpDefImpl
        extends EntityDefImpl {
    /**
     * This is the default constructor (do not remove).
     */
    public EmpDefImpl( ) {}
  
    //~ Methods ****************************************************************************
  
    public long getTableRowCount( DBTransaction transaction ) {
      String query = getQuery( );
      String countQuery = String.format( "SELECT COUNT(*) FROM (%s)", query );
      long count = 0;
  
      ViewObject vo = transaction.createViewObjectFromQueryStmt( countQuery );
  
      try {
        vo.executeQuery( );
  
        Row row = vo.first( );
        Number number = (Number)row.getAttribute( 0 );
        count = number.longValue( );
      } finally {
        vo.remove( );
      }
  
      return count;
    }
  }
  

  Depending on your card type, you may not get an oracle.jbo.domain.Number, but something else, so the cast may need correction.

  Usage example:

  public class EmpEditViewImpl extends ViewObjectImpl {
    public EmpEditViewImpl() {
    }
  
    protected void executeQueryForCollection( Object object, Object[] object2, int i ) {
      super.executeQueryForCollection( object, object2, i );
  
      EmpDefImpl def = ( EmpDefImpl )getEntityDef( 0 );
      long tableRowCount = def.getTableRowCount( getDBTransaction() ) );
  
      // Do something with it
    }
  }
  

  As you can see, the code is fairly generic. Also, you might be able to put this in a base extension ADF class.

  Sascha

  Published by: Sascha Herrmann on June 7, 2012 14:39

• [8i] way to add a specific number of rows based on a column value?

  I know that the version of Oracle is old:
  Oracle8i Enterprise Edition Release 8.1.7.2.0 - Production
  PL/SQL Release 8.1.7.2.0 - Production
  CORE 8.1.7.0.0-Production
  AMT for HP - UX: 8.1.7.2.0 - Production Version
  NLSRTL Version 3.4.1.0.0 - Production
  
  I'm trying to get an old database data in a specific format, and this should be run several times during the next year, until we can phase out the old database. Unfortunately, it is not particularly useful for formatting the data after he is questioned, so if a SQL solution can be found, it would probably be best.
  
  Some examples of data:
  

  CREATE TABLE     testabc
  (     item     CHAR(25)
  ,     qty     NUMBER(13,4)
  );
  
  INSERT INTO     testabc
  VALUES ('Item1',1);
  INSERT INTO     testabc
  VALUES ('Item2',3);
  INSERT INTO     testabc
  VALUES ('Item3',1);
  INSERT INTO     testabc
  VALUES ('Item4',2);

  I want to get these results:

  ITEM                                  QTY
  ------------------------- ---------------
  Item1                               1.000
  Item2                               3.000
  --blank row
  --blank row
  Item3                               1.000
  Item4                               2.000
  --blank row
  
  OR
  
  ITEM                                  QTY
  ------------------------- ---------------
  Item1                               1.000
  Item2                               1.000
  Item2                               1.000
  Item2                               1.000
  Item3                               1.000
  Item4                               1.000
  Item4                               1.000

  Either format would be acceptable. The key is to have the same number of rows for an article as its quantity.
  
  Any help on this would be appreciated. I wasn't sure if maybe that this would require a CONNECT BY statement. With my luck, it requires one of the functions which did not become available until 9i...
  
  I tried this:

  SELECT     CASE
            WHEN     LAG(qty)     OVER(PARTITION BY item ORDER BY item, qty DESC)     = 1
            THEN     item
       END                    AS item
  ,     CASE
            WHEN     LAG(qty)     OVER(PARTITION BY item ORDER BY item, qty DESC)     > 1
            THEN     LAG(qty)     OVER(PARTITION BY item ORDER BY item, qty DESC) - 1
       END                    AS qty
  FROM     testabc
  ;

  but he gave me a bunch of empty lines.
  
  Thank you!

  Hello

  Here's a way to do it in Oracle 8.1

  SELECT       CASE  c.n
            WHEN 1  THEN  t.item
         END          AS item_col
  ,       CASE  c.n
             WHEN 1  THEN  t.qty
         END          AS qty
  FROM       testabc  t
  ,       (
            SELECT     ROWNUM     AS n
            FROM     all_objects
            WHERE     ROWNUM     <= 10     -- If you know an upper bound
         )          c
  WHERE       c.n     <= t.qty
  ORDER BY  t.item
  ,            c.n
  ;
  

  This assumes that this quantity is never more than the number of lines in object (usually at least 5000). If you need more lines, you can cross join object to itself, with the result a limit of 25 million lines or more.
  The WHERE clause in the subquery c is not absolutely necessary, but it will make things faster.

  Published by: Frank Kulash, December 19, 2011 15:33

  The solution above is for the first set of results, with blank lines.
  For the results of the second, with lines no NULL duplicate, just lose the CASE expressions in the FROM clause:

  SELECT       t.item
  ,       t.qty
  FROM       testabc  t
  ,       (
            SELECT     ROWNUM     AS n
            FROM     all_objects
            WHERE     ROWNUM     <= 10     -- If you know an upper bound
         )          c
  WHERE       c.n     <= t.qty
  ORDER BY  t.item
  ,            c.n
  ;