Doubt on using trunc()

Hi,
I need some clarification over using trunc().
I came across something where I need to pick only month and day from the date column where the format is YYYYMMDD. Can anyone please tell me how to use that and whether any better functions to use than the trunc. And I need to compare that against some date.
like- Suppose if the month and day of my date is between april 3rd and october 30 i need to add one hour otherwise the date should be the same..Could anyone pls help me in this regard??!!
Thanks in advance,
GK

sql>select dt,
2         dt + case when to_char(dt, 'mm/dd') between '04/03' and '10/30' then (1/24) else 0 end new_dt
3    from t
4   order by dt;
DT                    NEW_DT
02/14/2006 08:30:00am 02/14/2006 08:30:00am
04/01/2006 04:00:00pm 04/01/2006 04:00:00pm
04/15/2006 10:00:00am 04/15/2006 11:00:00am
07/04/2006 06:00:00pm 07/04/2006 07:00:00pm
11/10/2006 09:00:00pm 11/10/2006 09:00:00pm

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Using TRUNC function on partitioned column

Hi All,
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STEP1
CREATE TABLE TEST_PARTITION
EMP_ID VARCHAR2(10 BYTE),
CREATE_DT DATE,
EMP_RGN_NM VARCHAR2(2 BYTE),
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SUBPARTITION BY LIST(EMP_RGN_NM)
SUBPARTITION TEMPLATE(
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insert into TEST_PARTITION values(1000,TO_DATE('01-sep-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',10);
insert into TEST_PARTITION values(1000,TO_DATE('02-sep-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',10);
insert into TEST_PARTITION values(1000,TO_DATE('01-Oct-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',10);
insert into TEST_PARTITION values(1001,TO_DATE('01-Aug-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',1);
insert into TEST_PARTITION values(1001,TO_DATE('02-Aug-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',2);
insert into TEST_PARTITION values(1001,TO_DATE('03-Aug-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',0);
insert into TEST_PARTITION values(1001,TO_DATE('01-sep-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',10);
insert into TEST_PARTITION values(1001,TO_DATE('02-sep-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',5);
insert into TEST_PARTITION values(1001,TO_DATE('01-Oct-2008 12:02:02', 'DD-MON-YYYY HH:MI:SS'),'SE',10);
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What about a function based index ?
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Execution Plan
| Id | Operation              | Name           | Rows | Bytes | Cost (%CPU)| Pstart| Pstop |
|   0 | SELECT STATEMENT       |                |     1 |    32 |     4   (0)|       |       |
|   1 | PARTITION RANGE ALL   |                |     1 |    32 |     4   (0)|     1 |     3 |
|   2 |   PARTITION LIST SINGLE|                |     1 |    32 |     4   (0)|   KEY |   KEY |
|   3 |    TABLE ACCESS FULL   | TEST_PARTITION |     1 |    32 |     4   (0)|   KEY |   KEY |
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|   0 | SELECT STATEMENT                   |                |     1 |    32 |     2   (0)|       |       |
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1. I will not use a shared cluster file system or any way of cache solution, i will only have my rdf files on each node, and i'm wondering if just by configuring this parameter i will be able to get the effect mentioned above ??
--> In such case what could go wrong is
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But web.show_document command for getjobid failed ( as ReportsA went down by this time)
--> You will not get the output shown ( though job was successful)
If shared cache was enabled, then Even if ReportsA is down, other cluster member ( say ReportsB)
will respond back to web.show_document.
Point 2,
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<reports_servermap>rep_cluster:ReportsA</reports_servermap>
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what is the Reports Server cluster name ?? and where do i find that name ??
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Using trunc as difference measure btwn two dates

I have a SQL query that works smoothly. It takes the difference between sets of dates that are >=0 and <=0. here it is:
SELECT createdate, id, objid, start_date, end_date
FROM greggs_date, HNEMap
where active =1
and trunc (createdate-start_date) >=0 and trunc (createdate-end_date) <=0;
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Hi,
robleh7 wrote:
I have a SQL query that works smoothly. It takes the difference between sets of dates that are >=0 and <=0. here it is:
SELECT createdate, id, objid, start_date, end_date
FROM greggs_date, HNEMap
where active =1
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Problem is I can't output the differences. In MS SQL Server you can show the number of days difference with the datediff function named in the SELECT part of the SQL statement not so with trunc used to get date differences. How can this query be rework to show the actual days of difference between start and end from create date.
Sorry, I don't understand the problem.
TRUNC (createdate - startdate)    is just a NUMBER. You can display it just like any other NUMBER.
SELECT k.hiredate                         AS base_date
,       d30.hiredate
,       TRUNC (k.hiredate - d30.hiredate) AS dif
FROM        scott.emp k
CROSS JOIN scott.emp d30
WHERE   k.ename        = 'KING'
AND     d30.deptno     = 30
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17-Nov-1981 20-Feb-1981        270
17-Nov-1981 22-Feb-1981        268
17-Nov-1981 28-Sep-1981         50
17-Nov-1981 01-May-1981        200
17-Nov-1981 08-Sep-1981         70
17-Nov-1981 03-Dec-1981        -16
Post a complete test script (including CREATE TABLE and INSERT statements, if needed) and the results you want from that script.

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GENERAL::
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Driver Classname: com.mysql.jdbc.Driver
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*******Code to make connection*********
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    e.printStackTrace();
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Doubt on using trunc()

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