Select first row from every set

id num dtl sdate udate
4 4JQ010907 MO601159736142323333 09-NOV-03
4 4JQ010907 MO601159736142323333 09-NOV-03 08-DEC-03
4 4JQ010907 MO601159736142323333 09-NOV-03 08-NOV-04
4 4JQ010907 MO601159736142323333 09-NOV-03 09-DEC-03
4 4JQ014529 W436-5902-285308-17-00 30-JAN-04
4 4JQ014529 W436-5902-285308-17-00 30-JAN-04 02-FEB-04
4 4JQ014529 W436-5902-285308-17-00 30-JAN-04 08-NOV-04
For each record having the same num, i want only one record picked, and that one should not have udate blank.
How can I do this using ROWNUM?

...but there is a pitfall when the columns in selection list are not the same to
columns in order by. Here unique can't help (while row_number() will
also return one row (another question is it wnat you need or not):
Compare:
SQL> select ename, deptno,sal from emp_1 order by 2,1;
ENAME          DEPTNO        SAL
CLARK              10       1225
CLARK              10       2450
KING               10       2500
KING               10       5000
MILLER             10        650
MILLER             10       1300
ADAMS              20        550
ADAMS              20       1100
FORD               20       1500
FORD               20       3000
JONES              20     1487,5
JONES              20       2975
SCOTT              20       1500
SCOTT              20       3000
SMITH              20        500
SMITH              20       1000
ALLEN              30        900
ALLEN              30       1800
BLAKE              30       1425
BLAKE              30       2850
JAMES              30        560
JAMES              30       1120
MARTIN             30        625
MARTIN             30       1250
TURNER             30        750
TURNER             30       1500
WARD               30        725
WARD               30       1450
28 rows selected.
SQL> select ename, deptno, sal from
2 (select ename, deptno, sal,
3 dense_rank() over(partition by deptno order by ename) rn
4 from emp_1) where rn = 1
5 /
ENAME          DEPTNO        SAL
CLARK              10       1225
CLARK              10       2450
ADAMS              20        550
ADAMS              20       1100
ALLEN              30        900
ALLEN              30       1800
6 rows selected.
SQL> select unique ename, deptno, sal from
2 (select ename, deptno, sal,
3 dense_rank() over(partition by deptno order by ename) rn
4 from emp_1) where rn = 1
5 /
ENAME          DEPTNO        SAL
CLARK              10       1225
CLARK              10       2450
ADAMS              20        550
ADAMS              20       1100
ALLEN              30        900
ALLEN              30       1800
6 rows selected.
SQL> select ename, deptno, sal from
2 (select ename, deptno, sal,
3 row_number() over(partition by deptno order by ename) rn
4 from emp_1) where rn = 1
5 /
ENAME          DEPTNO        SAL
CLARK              10       1225
ADAMS              20        550
ALLEN              30        900Rgds.

Similar Messages

How to select a row from duplicate set of records?

I want to select a row from a duplicate set of records.
below is the explanation of my requirement.
select * from test_dup;
COL_BILL     COL_SERV     COL_SYS
b1     s1     c
b1     s1     g
b1     s2     c
b1     s2     g
b2     s2     g
b2     s3     c
b2     s3     g
b3     s3     c
Here what I want is, for a distinct col_sys if col_bill and col_serv is same then I need the row where col_sys='c'
from the above result set I need the following:
b1     s1     c
b1     s2     c
b2     s3     c
I am using the following SQL query which is giving me the correct result set. But it will hamper the performance because there are total 45 columns in the table and total volume is around 50 million.
select * from test_dup where col_bill||col_serv in (
select col_bill||col_serv from (
select col_bill,col_serv,count(*) from test_dup
where col_sys in ('c','g')
group by col_bill,col_serv having count(*) >1)) and
col_sys='c';
Can anyone please provide me the optimize SQL query for the same.

Hi,
Another way,
SQL> with test_dup
as
     select 'b1' col_bill, 's1' col_serv, 'c' col_sys from dual union all
     select 'b1', 's1', 'g' from dual union all
     select 'b1', 's2', 'c' from dual union all
     select 'b1', 's2', 'g' from dual union all
     select 'b2', 's2', 'g' from dual union all
     select 'b2', 's3', 'c' from dual union all
     select 'b2', 's3', 'g' from dual union all
     select 'b3', 's3', 'c' from dual
select col_bill, col_serv, min(col_sys) col_sys
    from test_dup
   where col_sys in ('c', 'g')
group by col_bill, col_serv
having count( * ) > 1
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CO CO C
b1 s1 c
b2 s3 c
b1 s2 c
3 rows selected.Regards
Peter
Edited by: Peter on Feb 18, 2009 1:10 AM
- Added test data, thanks Karthick

Getting every odd-numbered row from result set

select *
from mytable
where MOD(rownum,2) = 1;
Why does this not give me every odd-numbered row from result set? It returns just 1 row....
Thank u

When you say MOD(ROWNUM,2)=1 it will list only the first row with rowid which is devisible by 2 and gives a reminder 1.
Just tweak your query with a GROUP BY:
SQL> select rownum from your_table group by rownum having mod(rownum,2) =1;
    ROWNUM
         1
         3
         5
         7
         9
        11
        13
        15
        17
        19
        21
    ROWNUM
        23
        25
        27
        29
        31
        33
        35
        37
        39
        41
        43
etc...
[pre]
Jithendra

How to get first row from View Object cache.

hi,
I am using Jdeveloper 11.1.1.6
can we get first row from View Object cache??
Thanks in Advance.
Best
Shashidhar

Hi Frank,
Thanks for reply!!
My case is:
I have a Query based ViewObject.
One of the field is LOV and remaining fields are in ADF table. the LOV field is out side ADF table when i insert first record in ADF table and i choose LOV filed the value is selected.
when i create second row LOV value got refreshed because both are in same VO.
I need to get the LOV value of first row and set same value to second Row.
Shashidhar

Af:inputListOfValues popup : selecting first row

Hi,
Is there a way to select first row inside lov popup, the by default behaviour is it selects the rowHeader rather than row itself.
When the lov popup is opened , there is no focus on table resides in the popup
- to focus on table, user has to press down arrow key - which will just focus on rowHeader and not the actual row itself
- to focus row for currently selected rowHeader user has to press right arrow key which will then select the table row itself
its cumbersome everytime when you open lov and do these extra steps to just to select a value from lov
any ideas?
Thanks,
Dev

so, why it supports keyboard navigation at all? either support full features or nothing. the fact that user can use up/down arrow keys which selects rowHeader of every row , rather than actual row
regarding "Search and Select : " it could be anything it has nothing to do with row selection,
Thanks,

How to select multiple rows from List Of Values

Hello,
I use ADF 11g to create my list of values (LOV). I want to select multiple rows from it. but i can't.
so how i can select many rows to set them in my adf table.
Thank in advance

Hi,
LOV is map to an attribute in the viewObject so it will return only one value or more values from selected row. You can't select multiple rows from LOV.
But you can do this by using popup which you can select multiple rows and insert the selected rows to another table.
This blog post explain how to achieve this :
http://husaindalal.blogspot.com/2009/11/search-from-popup-and-add-to-new-table.html#comments
Sameh Nassar

How do I select a row from the middle of a recordset?

UserID QuestionID Answered
10 9 N
10 8 N
10 7 N
10 6 N
10 5 Y
10 4 Y
10 1 Y
From the table sorted by QuestionID DESC, how do I select the first row from the bottom going up with Answered value equal to 'N'?
Which in the example above would be:
10 6 N
I need to select this row and get the QuestionID value equal to 6.
Right now I have:
select QuestionID
from tblMap
where Answered = 'N'
and ROWNUM = 1
order by QuestionID ASC;
This always the top most row, which would be:
10 9 N

Here i used DUAL to generate a list of numbers for me.
ME_XE?select *
2 from
3 (
4     select row_number() over (order by col1 desc) as rn, count(*) over() as cnt, col1
5     from
6     (
7        select level as col1 from dual connect by level <= 9
8     )
9 )
10 where ceil(cnt/2) = rn
11 /
                RN                CNT               COL1
                 5                  9                  5
1 row selected.
Elapsed: 00:00:00.07
ME_XE?Edited by: Tubby on Jul 8, 2009 1:47 PM
Seems i misread the question :)

Af:tableselectmany always selects first row and ONLY first row

My table in jsp:
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rows="#{bindings.AluNoExpeAluM1.rangeSize}"
first="#{bindings.AluNoExpeAluM1.rangeStart}"
emptyText="#{bindings.AluNoExpeAluM1.viewable ? \'No rows yet.\' : \'Access Denied.\'}"
binding="#{cient20uSeleccionAluBean.tablaMultiple}">
<af:column sortProperty="Vnumdocu" sortable="false"
headerText="#{bindings.AluNoExpeAluM1.labels.Vnumdocu}">
<af:outputText value="#{row.Vnumdocu}"/>
</af:column>
<af:column sortProperty="Vapeynombre" sortable="false"
headerText="#{bindings.AluNoExpeAluM1.labels.Vapeynombre}">
<af:outputText value="#{row.Vapeynombre}"/>
</af:column>
<f:facet name="selection">
<af:tableSelectMany text="Select items and ..." autoSubmit="true">
<af:commandButton text="commandButton 1"
action="#{cient20uSeleccionAluBean.elegirAlumnoAction}"
partialSubmit="true" immediate="true"/>
</af:tableSelectMany>
</f:facet>
</af:table>
Table don't have SelectionListener and SelectionState, but the method only select the first row from iterator.
This method "elegirAlumnoAction":
public String elegirAlumnoAction() {
Iterator itRs = this.getTablaMultiple().getSelectionState().getKeySet().iterator();
while(itRs.hasNext()){
Key k = (Key) itRs.next();
System.out.println(k.toString());
Row r = IteratorUtil.obtenerIteradorPorDefecto(this.ITERADOR_RESULTADO).getRow(k);
System.out.println(r.getAttribute("Vnumdocu"));
IteratorUtil.obtenerIteradorPorDefecto(this.ITERADOR_RESULTADO).setCurrentRow(r);
return null;
Message was edited by:
jortri
Message was edited by:
jortri

Maybe the following can help you:
http://andrejusb.blogspot.com/2007_02_01_archive.html
http://andrejusb-samples.blogspot.com/2007/02/jdevadf-sample-multi-selection-feature.html

Selecting Multiple Rows from ALV GRID Display

Hi,
I am having a ALV GRID Display. I want to select multiple rows from the Output and move them to an internal table.
Please let me know how do I acheive this.
Thanks in advance,
Ishaq.

Hi,
Have a look on the following code. It displays the selected rows which hv been selected in basic list.
TABLES:
spfli.
TYPE-POOLS:
slis.
DATA:
BEGIN OF t_spfli OCCURS 0,
    checkbox.
        INCLUDE STRUCTURE spfli.
DATA: END OF t_spfli.
DATA:
t_sspfli LIKE STANDARD TABLE OF t_spfli .
DATA:
fs_spfli LIKE LINE OF t_sspfli.
DATA:
fs_layout TYPE slis_layout_alv,
w_program TYPE sy-repid.
SELECT *
FROM spfli
INTO CORRESPONDING FIELDS OF TABLE t_spfli.
*fs_layout-info_fieldname = 'COLOR'.
fs_layout-box_fieldname = 'CHECKBOX'.
w_program = sy-repid.
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
EXPORTING
    i_callback_program       = w_program
    i_callback_pf_status_set = 'FLIGHT'
    i_callback_user_command = 'SPFLI_INFO'
    i_structure_name         = 'SPFLI'
    is_layout                = fs_layout
TABLES
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EXCEPTIONS
    program_error            = 1
    OTHERS                   = 2.
IF sy-subrc <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
*&      Form FLIGHT
      text
     -->RT_EXTAB   text
FORM flight    USING rt_extab TYPE slis_t_extab..
SET PF-STATUS 'FLIGHT' EXCLUDING rt_extab.
ENDFORM.                    "FLIGHT
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      text
     -->UCOMM      text
     -->SELFIELD   text
FORM spfli_info USING ucomm LIKE sy-ucomm
                       selfield TYPE slis_selfield.
selfield-refresh = 'X'.
CASE ucomm.
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        IF t_spfli-checkbox = 'X'.
          t_spfli-checkbox = ' '.
         t_spfli-color = 'C51'.
          MODIFY t_spfli TRANSPORTING checkbox.
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          APPEND fs_spfli TO t_sspfli.
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      ENDLOOP.
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      LEAVE PROGRAM.
ENDCASE.
CLEAR fs_spfli.
fs_layout-info_fieldname = 'COLOR'.
fs_layout-confirmation_prompt = 'X'.
fs_layout-key_hotspot = 'X'.
CALL FUNCTION 'REUSE_ALV_LIST_DISPLAY'
    EXPORTING
      i_callback_program = w_program
      i_structure_name   = 'SFLIGHT'
      is_layout          = fs_layout
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      OTHERS             = 2.
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MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
        WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
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ENDFORM.                    "SPFLI_INFO
Regards,
Chandu

SQL query - select one row from each date group

Hi,
I have data as follows.
Visit_Date Visit_type Consultant
05/09/2009 G name1
05/09/2009 G name2
05/09/2009 G name3
06/09/2009 I name4
07/09/2009 G name5
07/09/2009 G name6
How to select data as follows
05/09/2009 G name1
06/09/2009 G name4
07/09/2009 G name5
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Thanks,
MK Nathan
Edited by: k_murali on Oct 7, 2009 10:44 PM

Are you after this (one row per date per visit_type)
with dd as (select to_date('05/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name1' Consultant from dual
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            union all
            select to_date('05/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name3' Consultant from dual
            union all
            select to_date('06/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name4' Consultant from dual
            union all
            select to_date('07/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name5' Consultant from dual
            union all
            select to_date('07/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name6' Consultant from dual
            union all
            select to_date('07/09/2009','MM/DD/YYYY') Visit_Date, 'F' Visit_type, 'name7' Consultant from dual)
select trunc(visit_date) visit_date, visit_type, min(consultant)
from   dd
group by trunc(visit_date), visit_type
order by trunc(visit_date);
VISIT_DAT V MIN(C
09/MAY/09 G name1
09/JUN/09 G name4
09/JUL/09 G name5
09/JUL/09 F name7or are you after only one row per date?:
with dd as (select to_date('05/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name1' Consultant from dual
            union all
            select to_date('05/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name2' Consultant from dual
            union all
            select to_date('05/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name3' Consultant from dual
            union all
            select to_date('06/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name4' Consultant from dual
            union all
            select to_date('07/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name5' Consultant from dual
            union all
            select to_date('07/09/2009','MM/DD/YYYY') Visit_Date, 'G' Visit_type, 'name6' Consultant from dual
            union all
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select trunc(visit_date) visit_date, min(visit_type) visit_type, min(consultant)
from   dd
group by trunc(visit_date)
order by trunc(visit_date);
VISIT_DAT V MIN(C
09/MAY/09 G name1
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09/JUL/09 F name5

How to efficiently select random rows from a large table ?

Hello,
The following code will select 5 rows out of a random set of rows from the emp (employee) table
select *
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Is there an efficient way of selecting random rows from a table without having to do a table scan ? (I am new to Oracle, therefore it is possible that I am missing a very simple way to perform this task.)
thank you for your help,
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Edited by: 440bx on Jul 10, 2010 6:18 PM

Have a look at the SAMPLE clause of the select statement. The number in parenthesis is a percentage of the table.
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SQL> explain plan for select * from t sample (1);
Explained.
SQL> @xp
PLAN_TABLE_OUTPUT
Plan hash value: 2767392432
| Id | Operation           | Name | Rows | Bytes | Cost (%CPU)| Time     |
|   0 | SELECT STATEMENT    |      |   725 | 70325 |   289   (1)| 00:00:04 |
|   1 | TABLE ACCESS SAMPLE| T    |   725 | 70325 |   289   (1)| 00:00:04 |
8 rows selected.

How can i select some row from multiple row in the same group of data

I want to select some row from multiple row in the same group of data.
ColumnA
Column B
1 OK
1 NG
2 NG
2 NG
3 OK
3 OK
I want the row of group of
ColumnA if ColumnB contain even 'NG'
row , select only one row which Column B = 'NG'
the result i want =
ColumnA Column B
1 NG
2 NG
3 OK
Thank you

That's some awful explanation, but I think this is what you were driving at:
DECLARE @forumTable TABLE (a INT, b CHAR(2))
INSERT INTO @forumTable (a, b)
VALUES
(1, 'OK'),(1, 'NG'),
(2, 'NG'),(2, 'NG'),
(3, 'OK'),(3, 'OK')
SELECT f.a, MIN(COALESCE(f2.b,f.b)) AS b
FROM @forumTable f
LEFT OUTER JOIN @forumTable f2
ON f.a = f2.a
AND f.b <> f2.b
GROUP BY f.a

When selecting a row from a view with a nested table I want just ONE entry returned

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I dont want the "EXPLODED" nested table to show just the entry that matches my WHERE clause. Here is some more info:
My select statement:
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AAAHQPAAMAAAAfxAAA N00000 771 223774444 20 GREGG
CADILLAC 12-MAY-69 M R3
NON DENOMINATIONAL N STAFF USMC N
U
E06 11-JUN-02 H N
05-JAN-00 Y Y
USS SPAWAR
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TYPE(74, 'SHELLFISH', '12-JUN-02', NULL), SIALLERGY_TYPE(68, 'PEANUTS', '13-J
UN-02', NULL), SI_ALLERGY_TYPE(75, 'STRAWBERRIES', '13-JUN-02', NULL))
SI_ALLERGY_TAB()
75 STRAWBERRIES 13-JUN-02
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Name Null? Type
........ Omitted uneeded previous column desc because of metalink
character limit but the view is bigger then this.......
DEPT_NAME VARCHAR2(20)
DIV_NAME VARCHAR2(20)
ADDRESSES SI_ADDRESS_TAB
CURRENT_ALLERGIES SI_ALLERGY_TAB
DELETED_ALLERGIES SI_ALLERGY_TAB
SQL> desc si_allergy_tab
si_allergy_tab TABLE OF SI_ALLERGY_TYPE
Name Null? Type
ALG_SEQ NUMBER
ALG_NAME VARCHAR2(50)
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Name Null? Type
ALG_SEQ NUMBER
ALG_NAME VARCHAR2(50)
START_DATE DATE
STOP_DATE DATE

Can you explain what do you mean by the following?
"PL/SQL tables (a.k.a. Index-by tables) cannot be used as the basis for columns and/or attributes"There are three kinds of collections:
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(VAR) Varrying Arrays
(IBT) Index-by Tables (the collection formerly known as "PL/SQL tables")
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SQL> CREATE TABLE my_table ( id INTEGER PRIMARY KEY, ints my_ntb );
SQL> CREATE TYPE my_object AS OBJECT ( id INTEGER, ints my_ntb );
/IBT are declared inside stored procedures only and have slightly different syntax from NTB. Only variables in stored procedures can be based on IBT declarations.
CREATE PROCEDURE my_proc IS
   TYPE my_ibt IS TABLE OF INTEGER INDEX BY BINARY_INTEGER; -- now you see why they are called Index-by Tables
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Why would you then ever use IBTs?
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There's a lot more to be said, but I think this answers the question posed by Sri.
Michael

Newbie question: Select one row from table in PL/SQL

Hi,
I want to select one row from the table Employee where Emplyoyee Number is say 200. This is a simple SQL query, but I don't know the equivalent PL/SQL format. I will have 3 out params here - Id itself, Name, Salary. I will then have to populate a java resultset object from these out params.
Later, I'll have to use cursors to retrieve more than one row.
Thanks for any help.

Perhaps something like
CREATE OR REPLACE PROCEDURE get_employee( l_id IN OUT employee.id%TYPE,
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AS
BEGIN
SELECT name, salary
    INTO l_name, l_salary
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END;Justin
Distributed Database Consulting, Inc.
http://www.ddbcinc.com/askDDBC

Select a row from a table and throw an url

Hi experts,
I'm trying to select a row from a table in Visual Composer. What I need to do it's to click over this row and throw an Url. At the moment, I've added a column with a Pushbutton with the formula to show the link; it works fine. But I need to do it without buttons just selecting the row.
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Belen

Hi
To do this you will have to use a data store and a guard condition on the line which is triggered by the select action. You need to store a value in the data store each time a select action is performed. The guard condition should check for this and only perform the action when the value in the data store is greater than 0.
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