No.of feb 29's between two dates

Hi,
I would like to calculate feb29's between two dates currently using connect by level but it causes performance issue(50M data to process)
(SELECT SUM(DECODE(TO_CHAR(start_date + LEVEL - 1,'dd-mon'),'29-feb',1,0)) FROM dual CONNECT BY LEVEL <= SYSDATE - start_date+1) 'NO.OF.FEB29'Using Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 - 64bit
Thanks-

Small change required..
with t as
(select sysdate-10000 start_dt,to_date('01-Mar-2012','dd-Mon-yyyy') end_dt from dual)
select start_dt,end_dt,st_year,end_year,sum(case when mod(yr,400)=0 then 1
                when mod(yr,4) = 0 then 1
           else 0 end) cnt
from(     select start_dt,end_dt,st_year,end_year,st_year+rownum-1 yr
     from (
          select start_dt,end_dt,
               extract(year from start_dt)+
                 case when extract(month from start_dt) < 3 then 0 else 1 end st_year,
               extract(year from end_dt)+
                 case when extract(month from end_dt) >= 3 then 0 else -1 end end_year
          from t)
     connect by st_year+rownum-1 <= end_year
group by start_dt,end_dt,st_year,end_year
SQL> /
START_DT    END_DT         ST_YEAR   END_YEAR        CNT
11-may-1985 28-feb-2012       1986       2011          6
SQL> /
START_DT    END_DT         ST_YEAR   END_YEAR        CNT
11-may-1985 29-feb-2012       1986       2011          6
SQL> /
START_DT    END_DT         ST_YEAR   END_YEAR        CNT
11-may-1985 01-mar-2012       1986       2012          7Edited by: jeneesh on Sep 26, 2012 11:44 AM
formatted
Edited by: jeneesh on Sep 26, 2012 12:07 PM
Subqueries can be avoided, added for understanding purpose

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How to calculate number of sundays and saturdays between two Dates

friends i want to calculate how many Sundays come in two Dates
i have tried following code which is hard coded i have to impliment method which can give me number of Sundays between two Dates
please help me
import java.util.Date;
     import java.text.DateFormat;
     import java.text.SimpleDateFormat;
     import java.util.Calendar ;
     import java.util.GregorianCalendar;
public class DateDiffCalculator     {
     private static final SimpleDateFormat SDF = new SimpleDateFormat("yyyy-MMM-dd");
public DateDiffCalculator()     {
     public static Date getDate (String date) throws Exception {
//log.debug(" "+date);
          return SDF.parse(date);
public static Date getDate (Date date) throws Exception {
// log.debug("date is "+date);
          return getDate(SDF.format(date));
public static long getDiffInDays(Date d1,Date d2)     {
     boolean isdiffGreaterThanYear=false;
     long diffInMilliSeconds=d1.getTime()-d2.getTime();
     return diffInMilliSeconds/(1000*60*60*24);
public static int getYear(String date)     {
          //String[] day=     {Sun,Mon,Tue,Wed,Thu,Fri,Sat};
          Integer     year=new     Integer(date.substring(0,4));
     return year.intValue();
public static int getMonth(String date)     {
          //String date.substring(5,7);
          System.out.println(" "+date.substring(5,8));
          String     m= date.substring(5,8);
          int month=0;
          if(m.equalsIgnoreCase("Jan"))     {
          month=1;
          if(m.equalsIgnoreCase("Feb"))     {
          month=2;
          if(m.equalsIgnoreCase("Mar"))     {
          month=3;
          if(m.equalsIgnoreCase("Apr"))     {
          month=4;
          if(m.equalsIgnoreCase("May"))     {
          month=5;
          if(m.equalsIgnoreCase("Jun"))     {
          month=6;
          if(m.equalsIgnoreCase("Jul"))     {
          month=7;
          if(m.equalsIgnoreCase("Aug"))     {
          month=8;
          if(m.equalsIgnoreCase("Sep"))     {
          month=9;
          if(m.equalsIgnoreCase("Oct"))     {
          month=10;
          if(m.equalsIgnoreCase("Nov"))     {
          month=11;
          if(m.equalsIgnoreCase("Dec"))     {
          month=12;
          return month;
     public static int getDay(String date)     {
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public static int getNumberofSundays(String d1,String d2) throws Exception     {
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               Date date2=getDate(d2);
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public static void main(String[] arg)throws Exception     {
System.out.println(" "+getNumberofSundays("2005-Oct-07","2006-Mar-01"));
}

thanks now i have modified the get Month Code
as follows
public static int getMonth(String date)     {
          //String date.substring(5,7);
          System.out.println(" "+date.substring(5,8));
          String     m= date.substring(5,8);
          int month=0;
          if(m.equalsIgnoreCase("Jan"))     {
          month=0;
          if(m.equalsIgnoreCase("Feb"))     {
          month=1;
          if(m.equalsIgnoreCase("Mar"))     {
          month=2;
          if(m.equalsIgnoreCase("Apr"))     {
          month=3;
          if(m.equalsIgnoreCase("May"))     {
          month=4;
          if(m.equalsIgnoreCase("Jun"))     {
          month=5;
          if(m.equalsIgnoreCase("Jul"))     {
          month=6;
          if(m.equalsIgnoreCase("Aug"))     {
          month=7;
          if(m.equalsIgnoreCase("Sep"))     {
          month=8;
          if(m.equalsIgnoreCase("Oct"))     {
          month=9;
          if(m.equalsIgnoreCase("Nov"))     {
          month=10;
          if(m.equalsIgnoreCase("Dec"))     {
          month=11;
          return month;
but question remains same how to calculate number of Sundays Between 2 Dates

How to caluclate tat between two dates of one timestamp field

Hi,
could some one help how to caluclate days between two dates of single timestamp filed and with this
query
Select * from m_activity_transaction where actn_opp_id in (
Select actn_opp_id from m_activity_transaction where ACTN_ACTV_ID = 218
Group by actn_opp_id
having count(*) > 1 ) and ACTN_ACTV_ID = 218
order by actn_performed_on
iam getting output is
ACTN_ID ACTN_OPP_ID ACTN_PERFORMED_ON
319415 95831 27-JAN-12 11.06.20.000000 AM
315249 95831 08-FEB-12 05.32.54.000000 PM
301927 103509 20-DEC-11 04.01.43.000000 PM
301458 103509 19-DEC-11 04.51.03.000000 PM
294841 115840 10-JAN-12 03.20.12.000000 PM
312062 115840 11-JAN-12 05.17.06.000000 PM
and i nedd to caluclate no.of days between two dates like 27-JAN-12 11.06.20.000000 AM and 08-FEB-12 05.32.54.000000 PM where actn_id is unique AND ACTN_OPP_ID IS NOT UNIQUE.
Thanks in Advance,
vvr.

This way?
with data as
select 315249 a, 95831 b, to_timestamp('27-JAN-12 11.06.20.000000 AM', 'DD-MON-RR HH.MI.SS.FF6 AM') dt from dual union all
select 319415, 95831, to_timestamp('08-FEB-12 05.32.54.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 301927, 103509 , to_timestamp('20-DEC-11 04.51.03.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 301458 , 103509 , to_timestamp('19-DEC-11 04.01.43.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 363810 , 144656 , to_timestamp('27-JUN-12 12.43.28.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 363500 , 144656 , to_timestamp('26-JUN-12 11.41.50.000000 AM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual union all
select 363354 , 144656 , to_timestamp('25-JUN-12 12.41.13.000000 PM', 'DD-MON-RR HH.MI.SS.FF6 AM') from dual
select a, b, diff
from (
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          from data
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where tab.diff is not null;
A                      B                      DIFF
319415                 95831                  12
301927                 103509                 1
363500                 144656                 0
363810                 144656                 1

How to count the number of Fridays and Saturdays between two dates

Hi every one ... If we want to count the number of Fridays and Saturdays between two dates, how would we do that ? !
Dates are ( 11-Feb-2010) to (19-May-2010)
how to do it in SQL
Edited by: khalidoracleit on Jul 28, 2010 5:51 AM

some nice coding here, I'm still amazed with what some people can do with "connect by". But I agree with some statements here that this can take "time", and to be honest, it's funny to see it working, but if you do not have a computer, just a calendar and some paper, would you go for "counting" so there must be a better solution?
The best working math in here is done by Aketi Jyuuzou, who writes so good English that I wonder why he still insists that he doesn't ;-)
Anyhow I "translated" that code to English, and I really like that math. Math is math and data is data.
ALTER SESSION SET NLS_DATE_LANGUAGE='ENGLISH';
WITH my_dates AS (
SELECT to_date('20100211','yyyymmdd') start_date,to_date('20100519','yyyymmdd') end_date FROM DUAL
UNION ALL
SELECT to_date('20100211','yyyymmdd') start_date,to_date('20100214','yyyymmdd') end_date FROM DUAL
UNION ALL
SELECT to_date('20100211','yyyymmdd') start_date,to_date('20100213','yyyymmdd') end_date FROM DUAL
UNION ALL
SELECT to_date('20100211','yyyymmdd') start_date,to_date('20100212','yyyymmdd') end_date FROM DUAL
SELECT to_char(start_date,'DD.MM.YYYY') start_date,to_char(end_date,'DD.MM.YYYY') end_date,
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11.02.2010 19.05.2010 THURSDAY                             WEDNESDAY                            97                     28
11.02.2010 14.02.2010 THURSDAY                             SUNDAY                               3                      2
11.02.2010 13.02.2010 THURSDAY                             SATURDAY                             2                      2
11.02.2010 12.02.2010 THURSDAY                             FRIDAY                               1                      1                      -- andy

Number of sundays between two dates

Hii ,
How can I get number of sundays between two dates...?
Plz help me in this regard
Shoaib rehman

*& Report ZEX1
REPORT zex1.
DATA :       p_low TYPE d ,
                  p_high TYPE d .
DATA : gv_scnt TYPE i.
p_low = '20100115' .                                       "feb 1
p_high = '20100228'.
IF p_high > p_low.
PERFORM cal_sundays USING p_low .
WRITE :/ gv_scnt.
ELSE.
*             message date combination invalid
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*&      Form CAL_SUNDAYS
*       text
* --> p1        text
* <-- p2        text
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DATA : lv_week TYPE scal-week,
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DO .
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      EXPORTING
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      IMPORTING
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ENDFORM.                    " CAL_SUNDAYS
Execute this and check if this meets ur case . Logic should be something like this .
Br,
Vijay.

Working days between two date fields and Changing Factory Calendar

Hi,
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I have written the routine using factory calender and its working fine except for two problems now:
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DATA: IT_HOLIDAYS type TABLE OF ISCAL_DAY,
      IS_HOLIDAYS TYPE ISCAL_DAY.
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CLEAR : IT_HOLIDAYS.
T_DATE = SOURCE_FIELDS-/BIC/ZCCCHP812.
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CALL FUNCTION 'HOLIDAY_GET'
EXPORTING
HOLIDAY_CALENDAR = 'CH'
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TABLES
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Please help
Regards
Zabina
Edited by: Syed786 on Nov 2, 2011 9:15 AM

Hi Zabina,
Try this function module 'DURATION_DETERMINE'.
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With regards,
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How to calculate the month difference between two date char. in Query?

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vivekvm wrote:
Hi all
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http://jonathanlewis.wordpress.com
http://www.jlcomp.demon.co.uk
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Best Regards,Uri Dimant SQL Server MVP,
http://sqlblog.com/blogs/uri_dimant/
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Hi,
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I don't understand how most of the answers provided here not analytically solving the problem with many cases possible.
First let me understand you:
You have 2 dates range and you want to calculate day range for specific month and year between the original date range.
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declare @for_year int = 2013
declare @StartDate date = '2012-12-20'
declare @EndDate date = '2013-01-04'
SELECT
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DATEDIFF(DAY, @StartDate,@EndDate)
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WHEN (@EndDate > cast(DATEADD(d, -1, DATEADD(m, DATEDIFF(m, 0, cast( CONVERT(varchar(4), @for_year) + '-' + CONVERT(varchar(2), @for_month) + '-01' as date)) + 1, 0)) as date)) and (@StartDate between (cast(CONVERT(varchar(4), @for_year) + '-' + CONVERT(varchar(2), @for_month) + '-01' as date)) and (cast(DATEADD(d, -1, DATEADD(m, DATEDIFF(m, 0, cast( CONVERT(varchar(4), @for_year) + '-' + CONVERT(varchar(2), @for_month) + '-01' as date)) + 1, 0)) as date))) THEN
DATEDIFF(DAY, @StartDate,DATEADD(d, -1, DATEADD(m, DATEDIFF(m, 0, @StartDate) + 1, 0))) + 1
WHEN ((DATEDIFF(DAY, @StartDate, cast(DATEADD(d, -1, DATEADD(m, DATEDIFF(m, 0, cast( CONVERT(varchar(4), @for_year) + '-' + CONVERT(varchar(2), @for_month) + '-01' as date)) + 1, 0)) as date)) >= 0) and (DATEDIFF(DAY, cast(CONVERT(varchar(4), @for_year) + '-' + CONVERT(varchar(2), @for_month) + '-01' as date), @EndDate) >= 0)) THEN
DATEDIFF(DAY, cast( CONVERT(varchar(4), @for_year) + '-' + CONVERT(varchar(2), @for_month) + '-01' as datetime), DATEADD(d, -1, DATEADD(m, DATEDIFF(m, 0, cast( CONVERT(varchar(4), @for_year) + '-' + CONVERT(varchar(2), @for_month) + '-01' as datetime)) + 1, 0))) + 1
ELSE
0
END as [DD]
I don't know how you calculate day range between 01/01/2013 and 04/01/2013
is 4, it is actually is 3 but if that is the case, you can add 1 from the condition.

Select Query Between two dates...

Hi Guru's,
I need a Select Query between two dates, also if the record not found for any in between date then it should return NULL or 0 ...
for Example
1. I am having two records in DB for date 2-10-2008 & 4-10-2008
2. Now suppose I have given Query for date between 1-10-2008 to 5-10-2008
Then it should return me 5 records with valid values for 2 & 4 and NULL for other 1,3,5
Thanks.

Try like this:
with
t as
      select date '2008-10-02' as dt, 'Record #1 (in DB)' as str from dual union all
      select date '2008-10-04' as dt, 'Record #2 (in DB)' as str from dual
select v.dt, t.str
from (
         select date '2008-10-01' + level - 1 as dt
           from dual
         connect by level <= (date '2008-10-05' - date '2008-10-01') + 1
       ) v
left join t
    on v.dt = t.dt
order by 1

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