SQL & PL/SQL :: Dealing With Times Recorded In UTC
Oct 8, 2011
I am dealing with a bunch of tables containing sales information for an New Zealand organisation. The sale datetime has been recorded as UTC.
New Zealand operates Daylight Savings, so twice a year it changes its clocks.
When New Zealand is on standard time it is UTC+12.
When New Zealand is on daylight savings time it is UTC+13.
Thus an event which actually occurred when New Zealand was on standard time at 2011-08-31 15:20:52 local time, is recorded in the database as having occurred at 2011-08-31 03:20:52. However, an event that actually occurred when New Zealand was on daylight savings time at 2011-10-06 15:20:52 local time, is recorded in the database as having occurred at 2011-10-06 02:20:52.
I want to be able to read the sales dates from my table and convert them to the actual time in New Zealand when the event occurred. The table will contain data for sales that occurred in both standard and daylight savings times.
I do not think that the data has been stored with time zone information, simply that the application writing the data to the Oracle database, calculated the event time as UTC when it occurred and wrote that time to the table.
Does Oracle only know about what UTC-offset is in force right now or is it capable of determining what offset from UTC is required for any given historical date ?
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Jul 25, 2012
I am Oracle RACSIG (URL....) member, but from last week, I am not able to play any of the recorded web seminars. I am getting error "The webpage cannot be found HTTP 404". I am able to look at the PDF but not the recording.
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Dec 12, 2012
I have this very simple SQL statement:
SELECT e_id AS id,
'javascript:$(''P4_ID'','|| e_id ||'); openModal(showEvent);' AS url
FROM event_info evtwhich returns
86 javascript:$('P4_ID',86); openModal(showEvent);
87 javascript:$('P4_ID',87); openModal(showEvent);
88 javascript:$('P4_ID',88); openModal(showEvent);
89 javascript:$('P4_ID',89); openModal(showEvent);
But I'd like it to return the following (apostrophes surrounding the e_id)
86 javascript:$('P4_ID','86'); openModal(showEvent);
87 javascript:$('P4_ID','87'); openModal(showEvent);
88 javascript:$('P4_ID','88'); openModal(showEvent);
89 javascript:$('P4_ID','89'); openModal(showEvent);
And I am struggling with figuring out how to get this working.
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Mar 12, 2011
When working against the Oracle 10G/11G RAC database it's important to have all the relevant entries in the etc/hosts file.
Thus, when running the following code against the database sometimes it finishes with "Ok!" and sometimes getting the error below:
CODEimport java.sql.*;
public class TestDBOracle {
public static void main(String[] args)
[Code].....
The reason is missing RAC-related entries in the etc/hosts.
When dealing with Oracle RAC it should be both entries for the public and for the virtual IPs of the nodes in the etc/hosts file.
CODEA.A.A.A NODEA
A.A.A.B NODEB
...
B.B.B.X NODEA-VIP
B.B.B.Y NODEB-VIP
...
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Oct 21, 2010
I am working with oracle 10g / 11. I need to operate with CLOB values of some table, unknown for me: I read them from .Net (3.5), and have to save them to files (Windows) to be loaded after this with DBMS_LOB. Lets say that table contains 3 columns (1 - CLOB) and several rows.I want to store each CLOB value to separate file, and to store it after this into another DB table (another Instance, also).I cannot use dblinks and other techniques like this.
The point is - how to avoid dealing with encoding?
I just want to save the CLOB values to the files, with no meter about Database Instance character set, language, and so on. If I use default for .Net StreamReader UTF-8 format, the loading with DBMS_LOB failed.
what will be the best way to determine the encoding, and to convert Oracle used encoding to .Net one?
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Feb 22, 2013
Previously we had 32 bit C++. Now, we have migrated it to 64 bit. And our C++ programs interact with Oracle 10g DB.Our C++ program was working fine with 32 bit. But once after we migrate to 64 bit we are facing problem with one program which does FETCH(EXEC SQL FETCH SUBP1 INTO :new TabRec;) from Oracle DB. ie, We exit from a for loop in the C++ program when we get NOT FOUND(sqlca.sqlcode=1403) on executing the FETCH statement.
The sqlcode generated for NOT FOUND scenario is 1403. But, once after moving to 64 bit C++, we do not see the sqlcode 1403 instead we are seeing a different code 7124089117159473.
As the sqlcode is not 1403, our program does not exit from the for loop and goes on an infinite loop.Am I missing anything that makes me to not get the exact sqlcode?
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Mar 18, 2013
I'm using Oracle Database 10g Enterprise Edition Release 10.2.0.3.0 - ProdMy problem is, There is data for IN time and OUT time data type is DATE. I need to calculate OT hour from this two field and store into a third one column. But i'm confuse what should be the data type of the third column. Is it number or else ?
I know difference of two date column is number. So, first i need to know that data type i should use ?
Secondly, how i get the sum of the all stored time ? for example data are
1.30 -- One hour and thirty min.
2.45
3.50
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Oct 2, 2010
I found this query in one of my stored procedures that updates a key for a value in a data table by reading the information from a master table.
The data table is: ITEM_INVENTORY
The master table is: MASTER_SOURCE_SYSTEM
UPDATE ITEM_INVENTORY I
SET I.SOURCE_SYSTEM_ID =
(SELECT NVL(M.SRC_SYS_ID,-100)
FROM MASTER_SOURCE_SYSTEM M
WHERE M.SRC_SYS_DESC(+) = I.SOURCE_SYSTEM_CODE )
WHERE ORG_CODE = 'TNXC'
AND EXISTS (SELECT 1 FROM MASTER_SOURCE_SYSTEM M
WHERE M.SRC_SYS_DESC(+) = I.SOURCE_SYSTEM_CODE )
The situation here is that:
1. There are about 15000 rows that match ORG_CODE = 'TNXC'.
2. The SOURCE_SYSTEM_CODE is same for all the 15000 rows and there is a matching entry for it in the MASTER_SOURCE_SYSTEM table.
My question is: Do both the inner select statements execute 15000 times?
The statement executes within a second and updates 15000 rows. How is this made possible?
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Oct 19, 2012
i want one query which return minute between two times which is in this format: 12:00:00 and 06:00:00
so in this it should return 360 minutes.
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Mar 9, 2010
How to get rows N times in a result set?
For obscure test purposes I need to modify an existing SQL query to emit the rows N times instead once. I'm aware of the possibility to "UNION ALL" the query with itself to get the all rows twice.
But as I require the resulting rows to be emitted around ten to hundred times this approach doesn't seem sensible to me. Not to speak of the missing possibility to parametrize the number of "repetitions".
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Jun 28, 2013
I have code that creates a sequence and a select statement that generates the next number in a sequence. It starts the sequence at 5 and every subsequent number is the previous number minus 3. The minimum value it can go to is 0. All I want is for my select statement to execute three times in a row. Is there any way I can do that?
create sequence MY_FIRST_SEQ
increment by -3
maxvalue 5
start with 5
minvalue 0
nocycle;
select MY_FIRST_SEQ.NEXTVAL from dual;
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Jan 8, 2013
I would the query to do the following:
1. Make the jobname distinct, because it keeps giving me multiple entries for each jobname
2. Add the the start_time of SOD_start_data9_UAT1 to end_time fodba_MUAT1 to get the combined duration
3. CONCAT jobnames SOD_start_data9_UAT1 and end_time fodba_MUAT1
4. Generate the last seven days batch run times
5. Generate a report into .csv format and email out
6. I have access to sqlplus and plsql developer
select distinct JOBNAME, schedtab
, to_char(to_timestamp(trim(timestmp)
, 'YYYYMMDDHH24MISS') - numtodsinterval(elaptime / 100
, 'SECOND'), 'YYYY-MM-DD HH24:MI:SS') as start_time
[code]...
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Nov 11, 2012
I am trying to determine the number of times a value appears and display the count. However the value can only be counted once per 'trip' even though it may appear several times per trip.
for e.g.
Quote:trip table
-------
trip_id start_date end_date duration
445 01-jan-12 03-jan-12 3
Quote:pickup table
--------
pickup_id trip_id company
1 445 randomname
2 445 randomname
3 445 google.inc
4 878 randomname
with the above data the expected value would be two because the trip id appears twice so it was just the one trip - given a count of one. I am not sure how create a query to check this.
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Mar 22, 2011
I am trying to query O/P from two tables.Hence, populate same column(Level_Name) two time on report based on its Level
Table =Level_Mst
Codeno Level_Name Parent_level
1 IT Dir 0
2 HR Dir 0
3 Assets Section 1
4 Payroll Section 2
Table=Users
User_id Name Top_level Bottom_Level
1 John 1 3
2 Smith 2 4
Desired O/P
Name Top_lvl Bottom_lvl Top_lvl_Name Bottom_Lvl_Name
John 1 3 IT Dir Assets_Section
Right now im getting name from level_mst either for top_level or for bottom_level .I want to show both names in one row.
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Nov 25, 2012
I need to open an explicit cursor for making a total: after I have to use the same information of that explicit cursor for dividing a column of the cursor by that total. It is not enough to open close, reopen and reclose because I just obtain one register at the same time and it is the same register two times consecutively.
I don't want to use auxiliary structures cause there are 18000 columns for 10200 rows.
FOR i IN 300..300 --18000
LOOP
y:=ymax-ysize*(i+0.5);
[Code]......
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May 25, 2013
I need to run the below query and display the result every one hour.
Below code giving result only once.
I think my method is wrong.
SQL> declare
2 counter number :=0;
3 item varchar(300);
4 BEGIN
5 FOR item IN (
[Code]...
PL/SQL procedure successfully completed.
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Jan 25, 2011
In TOAD,I see one of my jobs is failing several times. However, I could refresh it manually.I found the following error. What is the cause of error and the way to rectify this.
ORA-23404: refresh group "ORA-23404: refresh group "schema_name"."job_name" does not exist
ORA-06512: at "SYS.DBMS_SYS_ERROR", line 95
ORA-06512: at "SYS.DBMS_REFRESH", line 23
ORA-06512: at "SYS.DBMS_REFRESH", line 195
ORA-06512: at line 1
"."" does not exist.
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Dec 20, 2012
I have some data that I need to group to the Month, Day, Year, Hour and minute in a subquery. Then I need to summarize it to the Month and year in the parent query.If I try to group by the field itself, it is not taking it down to hour and minutes - just the day, so I am losing records.if I do a TO_char (visitdate, 'DD-MON-YY HH:MI AM') in the subquery, then the main query no longer sees it as a date, so cannot do my TO_CHAR(VISITDATE,'MON-YYYY') in the parent. I could parse out the pieces using string manipulation, but that seems rather silly.Is there a way to keep as a date in my sub query and then convert to a string?
it looks a little like this, with some other fields that I have to max, sum ...
visit provider person visitdate
1 2 1 12/20/2012 10:30
2 2 2 12/20/2012 10:30
3 2 5 12/20/2012 11:30
4 3 3 12/21/2012 11:30
5 3 4 12/21/2012 11:30
I need to boil this down to
provider visitdate
2 12/20/2012 10:30
3 12/21/2012 11:30
2 12/20/2012 11:30
Then I use that in a subquery where I use just the month and year TO_CHAR(VISITDATE,'MON-YYYY') AS APPT_MO_YR right now if I do a group by visitdate on the subquery it returns
provider visitdate
2 12/20/2012
3 12/21/2012
even if I do a group by to_date(visitdate, 'DD-MON-YY HH:MI AM') it is still returning :
provider visitdate
2 12/20/2012
3 12/21/2012
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May 27, 2011
Im trying to replicate a set of rows multiple times to create large volume. I am trying by For Loop, but got confused how to pass the parameters in any cursor i declare.
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Oct 25, 2011
how many number of times the sql's had been executed/run in an oracle session. Executions in V$sql, is it the right place to look at? Will it give the number of times the sql has been executed in a particular session?
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Nov 30, 2012
The SAMPLE clause in the select statement works well in most cases, but we found in some instances the result is way off - between 200% to 700% discrepancy has been observed.
For example, we have thee tables with the following results:
Table1: 495,365,317 rows (20 cols, unique primary key present), SAMPLE ( 0.002018712182064212 ) returns 41,499 (about four times off - we expected about 10,000)
Table2: 3,350,864,539 rows ( 5 cols, unique primary key present), SAMPLE ( 0.00029843044634040336 ) returns 9,835 (this is good as it is close to 10,000)
Table3: 6,974,724,543 rows ( 5 cols, no unique primary key present), SAMPLE ( 0.00014337483779250091 ) returns 58,789 (about six times off - we expected about 10,000)
The tables got billions of rows, and that is why we want to do sampling. The sample percentage rate is computed to return about 10,000 rows in all three tables.On Table3, we ran the sampling three times in one occasion, and we got "58,570", "24,575" and "24,561"
I expected +/- 20% of variance, but 200% to 700% seems to be way too much.Once again, I stress that it does work well in most cases (another 3.4 billion table and numerous smaller tables we tested were well within +/- 5 percent of the target).I noted the presence of a primary key above because I read an article saying that the SAMPLE function relies on the existence of a primary key (which does not quite explain the examples above).Is this kind of spread something we should expect or is it a bug? Is the sampling rate too small for such large tables?
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Oct 3, 2012
I have a form which has a Number field. I set it's Format Mask property to 9,99,99,99,99,999 so that I can format it comma separated and to restrict the user to enter decimal values. If the user enter any format other than this for example any decimal values, it is showing the message FRM-40209:Field must be of the form 9,99,99,99,99,999 which is fine. But when the user enters a decimal value and try to save the form it pop up this message several times.
I tried to catch this error in ON-ERROR trigger and display a message. But this is also pop up several times. I tried to raise form_trigger_failure also. This is also not working. I want this error message to come only once.
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Sep 12, 2012
In ASH report
there is a section that goes like this
SQL ID Planhashed Sampled # of Executions % ActivityEvent% Event Top Row Source
fdy93qpr1227 1567 7.58direct path read 3.65TABLE ACCESS - FULL
does it suggest that this SQL has been executed for 1567 times is this correct .
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Feb 7, 2011
How many times i can do recover (TSPITR) a tablespace ? While trying to recover tspitr tablespace on 2nd time i got error message ORA-01178 file 13 created before last create controlfile,but first time it was success.
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Aug 2, 2013
Get the following error from Oracle ORA-24333: zero iteration count Cause: An iteration count of zero was specified for the statementAction: Specify the number of times this statement must be executed on whether is this a Oracle bug or if not what should be set to avoid this failure.
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Jan 31, 2012
I'm looking for a way to make CRLFs show in a CLOB.I'm feeding the insert statement with a concatinated string like this:
insert into table(Data) values (MyConc)
(MyConc is a string put togheter by another application)
Because of this I can't use the "|| chr(13) || chr(10) ||" because I only have that one concatinated string.Is there a character I can set in my string that automatically translates to a CRLF?
My CLOB-data should look something like this:
1;blue;Woodstock;;
34;giant;squid;attack;
5;blue;squid;;
And in this case the "MyConc" would look like this "1;blue;Woodstock;;[X]34;giant;squid;attack;[X]5;blue;squid;;[X]
where [X]=the character I need for CRLF =)
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Jun 16, 2010
I have a question about database fragmentation.I know that fragmentation can reduce performance in query times. The blocks are distributed in many extents and scans process takes a long time. Oracle engine have to locate the address of the next extent..
I want to know if there is any system view in which you can check if your table or index has high fragmentation. If it's needed I will have to re-create, move or rebulid the table or index, but before I want to know if the degree of fragmentation is high.
Any useful script or query to do this, any interesting oracle system view?
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Nov 21, 2010
This is what i want to do:
I have a basic report looking like this:
<Column name>
value 1
value 2
value 3
.
.
.
value n
Since the column is small it can fit in a page more then one time. I know how to make it print more then once: i switch the repeating frame to print down and across and i modify the frame that contains it so the horizontal elasticity is variable.
After these changes my report looks like this:
<Column name>
value 1-----------------------value n+1-----------------------value m+1
value 2-----------------------value n+2-----------------------value m+2
value 3-----------------------value n+3-----------------------...
.------------------------------- .
.------------------------------- .
.------------------------------- .
value n-----------------------value m
What i want is my report to look like this:
<Column name>-------<Column name>------------<Column name>
value 1-----------------------value n+1-----------------------value m+1
value 2-----------------------value n+2-----------------------value m+2
value 3-----------------------value n+3-----------------------...
.------------------------------- .
.------------------------------- .
.------------------------------- .
value n-----------------------value m
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Apr 11, 2011
I have a database which consists of various orders and various field.
I have a variable called createddatetime . I want that whenever i should run the database it should display records from
Yesterday 06:00:00 am to Current Date 05:59:59 am
Now to implement this i tried to put this syntax
and to_char(Createddatetime,'dd/mm/yyyy HH24:mi:ss') between 'sysdate-1 06:00:00' and 'sysdate 05:59:59'
But nothing comes up
where as definitely there are records between times because when i do and Createddatetime between sysdate-1 and sysdate I see valid records coming up.
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Jan 5, 2012
When i issue this command ,how many times to backup controlfile?
RMAN> BACKUP CURRENT CONTROLFILE INCLUDE CURRENT CONTROLFILE;
Is there difference between 'BACKUP CURRENT CONTROLFILE INCLUDE CURRENT CONTROLFILE' and 'BACKUP CURRENT CONTROLFILE'?
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