First and last analtic functions

Hi
I am trying to understand the functioning of first and last function. but getting not idea how they work.
doc says
FIRST and LAST are very similar functions. Both are aggregate and analytic functions that operate on a set of values from a set of rows that rank as the FIRST or LAST with respect to a given sorting specification. If only one row ranks as FIRST or LAST, then the aggregate operates on the set with only one element.
Can anyone help me to understand this by an example as small simple one
thanks
Nick

SQL> select max(sal) keep (dense_rank first order by empno) sal_max_first
2       , min(sal) keep (dense_rank first order by empno) sal_min_first
3       , max(sal) keep (dense_rank last order by empno) sal_max_last
4       , min(sal) keep (dense_rank last order by empno) sal_min_last
5    from emp
6 /
SAL_MAX_FIRST   SAL_MIN_FIRST    SAL_MAX_LAST    SAL_MIN_LAST
            800             800            1300            1300
1 rij is geselecteerd.The order by clause orders the fourteen employees such that the first one is 7369 - SMITH and the last one is 7934 - MILLER. The expression returns the salary of SMITH (800) or the salary of MILLER (1300). The min and max are dummy since there are no ties when ordering by the primary key (empno).
Regards,
Rob.

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First and Last Time Variation function

Hi all,
What Does the functions First and Last do exactly. I think It's hold an aggregation based on Dimension but i can't figure out how it works exactly.
(PS: I tried it on measure revenu)
Thanks very much

Hi,
I'm not sure whether First & Last function is aviable in OBIEE or not. But you can use that with "evaluate" function. First function is used to retreive the first value in a group. we can use that in conjunction with partition by clause.
ref the given link for more details
http://www.oracle-base.com/articles/misc/RankDenseRankFirstLastAnalyticFunctions.php

How to find first and last day of last month?.

Hello,
I am using Crystal Report XI.
Reports will be generated on first of every month for
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dynamic.
For august, Start date is July 1st and End date July 31st.
For September, start date is Aug 1st and Aug 31st.
How can i get first of previous month as start date and last
day of the previous month as end date?.
Same kind of thing I want to do for future report ..find next
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Thanks

Adomacro,
you could do a function, like this
<cffunction name="getReportdates" returntype="struct"
hint="Given an arbitrary month and year, the function returns a
structure containing the first and last day of the previous
month">

<cfargument name="mnth" type="string" required="No"
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<cfargument name="yr" type="numeric" required="No"
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<cfset reportDates.firstDayOfPreviousMonth =
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Given month: March
2004 
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<cfoutput>#dateFormat(getReportdates('March',2004).firstDayOfPreviousMonth,"d
mmm yyyy")#</cfoutput> 
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mmm yyyy")#</cfoutput> 


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Select first and last records in grouped results - Oracle 11g

Say I have the following information in an Oracle 11g table:
Qty
Production order
Date and time
20
00000000000000001
12-JAN-14 00:02
20
00000000000000001
12-JAN-14 00:05
20
00000000000000001
12-JAN-14 00:07
20
00000000000000001
13-JAN-14 00:09
30
00000000000000002
12-JAN-14 00:11
30
00000000000000002
12-JAN-14 00:15
30
00000000000000002
12-JAN-14 00:20
30
00000000000000002
14-JAN-14 00:29
I would like to write a query that would return the following:
Qty
Production order
First
Last
80
00000000000000001
12-JAN-14 00:02
13-JAN-14 00:09
120
00000000000000002
12-JAN-14 00:11
14-JAN-14 00:29
That is, the sum of the Qty column grouped by Production order, and the date/time of the first and last records for each Production order.
I came up with a query that yielded this result:
Qty
Production order
First
Last
80
00000000000000001
12-JAN-14 00:02
14-JAN-14 00:29
120
00000000000000002
12-JAN-14 00:02
14-JAN-14 00:29
Which means that the First and Last columns show the overall first and last date / time of the whole table. Please note that this is a dummy table. Sorry I am now allowed to write the actual query
I came up with since work policies do not allow me to share it. Also, I tried with windowing functions such as rank()and row_number() but my user does not have enough privileges to do so.
Any help or hints will be greatly appreciated.

Due to the fact that Oracle does not record the rows in any particular order, it would be wrong that the "first date" would be the first row processed by the query.
Therefore you would have to supply some other column if you do not want to consider the table as ordered by date.
Also, any analytical functions will need you to supply the "order by" and if its the date, then just a simple query will do:
SQL>WITH Tab1 (Qty, Production_Order, Pdate)
2       AS (SELECT 20, '00000000000000001', TO_DATE ( '12-JAN-14 00:02', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
3           SELECT 20, '00000000000000001', TO_DATE ( '12-JAN-14 00:05', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
4           SELECT 20, '00000000000000001', TO_DATE ( '12-JAN-14 00:07', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
5           SELECT 20, '00000000000000001', TO_DATE ( '13-JAN-14 00:09', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
6           SELECT 30, '00000000000000002', TO_DATE ( '12-JAN-14 00:11', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
7           SELECT 30, '00000000000000002', TO_DATE ( '12-JAN-14 00:15', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
8           SELECT 30, '00000000000000002', TO_DATE ( '12-JAN-14 00:20', 'DD-MON-YY HH24:MI') FROM DUAL UNION ALL
9           SELECT 30, '00000000000000002', TO_DATE ( '14-JAN-14 00:29', 'DD-MON-YY HH24:MI') FROM DUAL)
10 SELECT   SUM ( Qty), Production_Order, MIN ( Pdate), MAX ( Pdate)
11      FROM Tab1
12 GROUP BY Production_Order
13* ORDER BY Production_Order
SQL> /
SUM(QTY) PRODUCTION_ORDER     MIN(PDATE)                    MAX(PDATE)
        80 00000000000000001    12-Jan-2014 00:02:00          13-Jan-2014 00:09:00
       120 00000000000000002    12-Jan-2014 00:11:00          14-Jan-2014 00:29:00

How to get first and last date of previous month

To set default values in selection screen,I want first and last date of the previous month.
Also I want the first and last dates of previous quarter.
The quarters can be only january to march, apr to june, jul to sept, oct to dec.
I want to run a program on beginning of each month by job scheduling having selection screens for the above monthly and quarterly dates.

Hi Suhas,
Use the below code.
DATA: v_date LIKE sy-datum.
DATA: v_month_begin_date TYPE sy-datum,
 v_month_end_date TYPE sy-datum,
 v_month(2) TYPE n,
 v_month1(2) TYPE n,
 v_quarter TYPE i,
 v_year(4) TYPE n,
 v_quarter_begda TYPE sy-datum,
 v_quarter_endda TYPE sy-datum.
v_month = sy-datum+4(2).
IF v_month = '01'.
v_month = '12'.
v_year = sy-datum+0(4) - 1.
ELSE.
v_month = v_month - 1.
v_year = sy-datum+0(4).
ENDIF.
CONCATENATE v_year v_month '01' INTO v_date.
CALL FUNCTION 'HR_JP_MONTH_BEGIN_END_DATE'
EXPORTING
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 ev_month_begin_date = v_month_begin_date
 ev_month_end_date = v_month_end_date.
v_month1 = sy-datum+4(2).
IF v_month1 = '01' OR
 v_month1 = '02' OR
 v_month1 = '03'.
v_quarter = 1.
ELSEIF v_month1 = '04' OR
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 v_month1 = '06'.
v_quarter = 2.
ELSEIF v_month1 = '07' OR
 v_month1 = '08' OR
 v_month1 = '09'.
v_quarter = 3.
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v_quarter = 4.
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IF v_quarter = 1.
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v_quarter = v_quarter - 1.
v_year = sy-datum+0(4).
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EXPORTING
 im_quarter = v_quarter
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WRITE:/5 'previous quarter end date : ', v_quarter_endda.
Message was edited by:
 Velangini Showry Maria Kumar Bandanadham

Format first and last record of result query

Hello
I have the following query
<tt>select 1 seq, 'This is First record' data from dual union all
select 2, 'Data ' || tname from tab union all
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order by 1</tt>
When i spool this statement to a listfile with col seq noprint option i get:
This is First record
Data MLA_ACCESS_LIST
Data MLA_APPLICATIONS
Data MLA_VPD_PCK
Data MLA_VPD_TABLES
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But i want:
This is First record MLA_ACCESS_LIST
Data MLA_APPLICATIONS
Data MLA_VPD_PCK
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Thanks Auke

select case row_number() over (order by tname)
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end || tname ||
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hth

Finding first and last members of a group set

Is there any example how to use 'first' and 'last' functions in an sql query ?
I have tried to execute a query like this on the scott.emp table :
select deptno,min(sal),max(sal),first(sal) from emp group by deptno;
but I always get this message:
ERROR at line 1:
ORA-00904: "FIRST": invalid identifier
btw I use Oracle RDBMS ver 9.1.0.3 for Solaris in my server.
tx for your help
sjarif

Syarif,
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select deptno,
min(deptno)
keep (dense_rank first order by sum(sal) desc) highest_sal,
min(deptno)
keep (dense_rank last order by sum(sal) desc) lowest_sal
from emp
group by deptno
Is there any example how to use 'first' and 'last' functions in an sql query ?
I have tried to execute a query like this on the scott.emp table :
select deptno,min(sal),max(sal),first(sal) from emp group by deptno;
but I always get this message:
ERROR at line 1:
ORA-00904: "FIRST": invalid identifier
btw I use Oracle RDBMS ver 9.1.0.3 for Solaris in my server.
tx for your help
sjarif

FM for First and Last Day_Current Month

Hello All,
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Regs,
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Hi Sravan,
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FM - BUILD_PERIOD_TABLE
code is mentioned below.
data: it_cperiod type table of range_prds with header line,
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here sample data:
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SELECT 100 sid, 'ABC' SNAME, 5 status_id ,SYSDATE + 2/24 start_date FROM dual UNION ALL
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SELECT 100 sid, 'ABC' SNAME, 7 status_id ,SYSDATE + 3/24 start_date FROM dual UNION ALL
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if you want all the info on the same row.
/* Formatted on 10/19/2011 7:06:50 AM (QP5 v5.149.1003.31008) */
WITH t AS (SELECT 100 sid,
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Get first and last date of month

Hi,
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Regards,
SP

Hi,
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DATA : v_enddate TYPE sy-datum.
DATA : v_temp TYPE dats.
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Hi SAP,
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Get First and last day of Month..

Hi Friends,
I am trying to fetch First and Last day of a month and would like to implement that in the following code:
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Here Date A and B are in Format of MM DD YYYY (March 14, 2008)
and Date C is like MM YYYY (March 2008)
How can I get the Date_C as March 1, 2008 OR March 31, 2008 format if Date A and B are NULL ?
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Edited by: user11095386 on Apr 23, 2009 10:45 AM

Hi,
In my earlier message, I thought that you were starting with strings like '03 12 2009' and that you wanted to display them as 'March 12 2009'. If what you have is just the reverse, then just reverse the format strings in my first message. Add a comma, if you want one, in the appropriate format string.
I believe this is what you want:
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Getting first and last day of week

Dear all .
Is there any funcion module which gives first and last day of the current week .
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start date of week : 13.11.2006
end date of week : 19.11.2006
in the same way I want how many days are there in month .
Eg : for Nov month :
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Thank you in advance

Use FM GET_WEEK_INFO_BASED_ON_DATE
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DATE                            15.11.2006
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WEEK                            200646
MONDAY                          13.11.2006
SUNDAY                          19.11.2006
Use FM HR_E_NUM_OF_DAYS_OF_MONTH
Import parameters               Value
P_FECHA                         15.11.2006
Export parameters               Value
NUMBER_OF_DAYS                    30
I hope it helps.
Best Regards,
Vibha
*Please mark all the helpful answers

First and last analtic functions

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