/*---*/
Select G.id_group, C.rownum id_column
from (select distinct id_group from MyTable) G
cross join (SELECT rownum FROM dual CONNECT BY LEVEL <= (select
max(id_column) from MyTable)) C
/*---*/
but it shows record 7, 8 and 9 as members of group 2.
I have a table test with column containing dates, characters and numbers. I have to extract the number part and the three characters before the number . My data looks like :
TEST ID DATA 1 3/12/2007 2 0 3 3/8/2010 ABC 217 4 NONE 5 COLM XYZ 469 6/8/2011 6 LMN 209
I have a table with around half a million rows. I would like to determine how many sequential events occur per device per unique group of events. The requirement is that the events continue to occur within 1 second of each other, every second, with no gaps. For example, in the sample below there is a sequence of 2 events for device 2737, and another sequence of 5 events for device 2737. If there was a 1 second interval with no event (Signal_time) then that would be the end of one group of events, this is also shown below.
Using Oracle 11.2.0.2.0
DEVICE_ID SIGNAL_TIME 4401 17-JUN-12 12.59.59 PM 2332 02-MAY-12 12.59.59 PM 1086 30-MAY-12 12.59.58 PM 2737 17-JUN-12 12.59.58 PM -- start of one group / sequence of events 2737 17-JUN-12 12.59.58 PM -- end of one group / sequence of events
[Code]...
-- start of one group / sequence of events
2737 16-JUN-12 11.59.59 PM 2737 16-JUN-12 11.59.59 PM 2737 17-JUN-12 12.00.00 AM 2737 17-JUN-12 12.00.01 AM
-- end of one group / sequence of events
2737 17-JUN-12 12.00.03 AM
-- this is excluded from the above group of 5 events, but this may be the start of another group
How can check database performance in a non-sequential parts of a day using AWR tool. For example, suppose we divide a day to 2 parts: low-traffic time and high-traffic time with the following time interval:
low-traffic time : 7:00am - 10:00am and 7:00pm - 11:00pm high-traffic time : 10:00am - 01:00pm and 4:00pm - 06:00pm
I want to examine performance using snapshots gathered by AWR. If I get 2 AWR reports for low-traffic time of day (one for 7:00am - 10:00am, another for 7:00pm - 11:00pm ) and compute average of values in 2 reports, could I called it database performance in low-traffic part of day or not?
I am trying to change the default behavior of Hide/Show Region to show, after some attempts i got it partially working but now clicking the icon to toggle hide/show doesn't work also changed the icons and added type="" but its not working.
We have a table (call it PROBLEM table) that varies between 60 and 100 million records from one data archival process to the next.The table has data from all 50 states and is range partitioned by each states unique code and has a primary key based on the following:
STATE the data is from BMRK YEAR the year the data was last benchmarked AREA location the data is from SERIES industry the data is located in YEAR the data was reported MONTH the data was reported DATA TYPE the type of data that was reported ESTIMATE TYPE the type of statistical estimate that was produced from the data REPORT ID report id unique to each state REPT SFC state the reporter resided in
We have developed a job that will process data from other tables and create some statistics resulting in approx 2.2 million inserts, .5 million updates and .5 million deletes on PROBLEM table during each job run. Once this table is loaded another process (call this PROBLEM_PROCESS)takes off that reads this updated information to produce some statistical data that is stored in another table. This data is produced by summing anywhere between 2 and 5000 records per query from the PROBLEM table.Here is the query (call it PROBLEM_QUERY)
select round(sum(cm_value*sample_weight),3),round(sum(pm_value*sample_weight),3) from matched_sample where state_fips_code = :1 and area_fips_code = :2 and series_type_code = 'B' and year = :3 and month = :4 [code]...
When we run this job it is very fast (20 minutes) until it gets to the PROBLEM_QUERY, at this point we get DB file scattered read waits, DB file sequential read waits and async IO waits and the job has run for as long as 2 days. When I look at grid, the PROBLEM query is doing a full table scan and ignoring the index.
Our systems people advised us to re-organize and re-index that data in the PROBLEM table after all of the DML and before the PROBLEM_PROCESS takes off. If we do this, it works and cuts our time down alot. However, the re-organize and re-index process adds eight hours to this process. Note: When we re-roganized the data we create a copy table on another set of table spaces and insert the data into the copy sorting the data on the primary key columns. After this we re-index the new table and drop the old table renaming the new table. When we do this later, we move the data back to another set of table spaces. So, we move the data back and for between table spaces A and B we can say.
We have Oracle installed on a M5000 server with Solaris as the OS the binaries and data files are stored on a NetApp Storage array(model 3160) of 500 1TB SATA 7200 RPM drives. However, there are 128 other databases on the NetApp filer as well.
IMO the array and the slow disks are the problem. I believe this because we are catering to the slow disks by re-organizing and re-indexing the PROBLEM table during each run. I don't believe this should be neccessary. We normally re-organize and re-index our data each week in our production system after many more transactions than this.
Our systems people state it is our application. Oracle Support tells us the statistics are out of date but have not answered us on why the statistics are out of date and the index is abandoned after 1 run.
In a 3-node RAC setup; one node is showing high CPU utilization around 40~50%. The CPU utilization was less than 20% 10 days back but from 9th oldest day it jumped and consistently shows the double figure. I ran AWR reports on all three nodes and found one node with high CPU utilization and shows below tops events-
EVENT WAITS TIME(S) AVG WAIT(MS) %TOTAL CALL TIME WAIT CLASS CPU time 5,802 34.9
RFS ping 15 5,118 33,671 30.8 Other
Log file sequential read 234,831 5,036 21 30.3 System I/O
Sql*Net more data from client 24,1711,08745 6.5 Network
Db file sequential read130,939 4533 2.7 User I/O
Findings:- On AWR report(file attached) for node= sipd207; we can see that "RFS PING" wait event takes 30% of the waits and "log file sequential read" wait event takes 30% of the waits that occurs in database.
1)Are these symptoms of undersized log buffer? 2)I feel Network wait can be reduced by tweaking SDU & TDU values based on MDU.
If I use the conventional path will SQL*Loader process a data file sequentially from top to bottom? I have a file comprised of header and detail records with no value found in the detail records that can be used to relate to the header records. The only option is to derive a header value via a sequence (nextval) and then populate the detail records with the same value pulled from the same sequence (currval). But for this to work SQL*Loader must process the file in the exact same sequence that the data has been written to the data file. I've read through the 11g Oracle® Database Utilities SQL*Loader sections looking for proof that this is what will happen but haven't found this information and I don't want to assume that SQL*Loader will always process the data file records sequentially.
Following query is hanging either with 'Sequential access read' or 'Latch Free' wait event Important thing is the table which is self joined in subquery here does not have any index at all While it was hanged I tried to get trace of it and terminated twice. As such haven't got 'row source generataion' The table has only 120000 records and it shall update 34000 records
UPDATE invoice_header inv SET inv.modified_due_date = (SELECT inv1.btn_due_date FROM invoice_header inv1 WHERE inv.dct_code = inv1.dct_code AND inv1.release = 'A5')
[code]...
During 'sequential read' using p1,p2 values tried to get what the session is reading and found that it is using the table itself.
During lath free I found following SELECT name, 'Child '||child#, gets, misses, sleeps FROM v$latch_children WHERE addr= (select p1raw from v$session_wait where sid=18) UNION
[code]...
However instead of self join when I creaed global temporary table as
create global temporary table t as select * from invoice_header where release='A5'
And used it in the update as
UPDATE invoice_header inv SET inv.modified_due_date = (SELECT t.btn_due_date FROM t WHERE inv.dct_code = t.dct_code AND t.release = 'A5') WHERE inv.release = 'A5' AND inv.btn_due_date >= TRUNC (SYSDATE)
It updated the records in a second!!
Questions are 1) why it is producing 'sequential read' wait event when there is no index access or else why it is doing single block access when FTS is required? 2) Why is the 'latch free' wait event here and what it indicates here with 'cache buffer handles'? Is it because we are reading and updating the same segment?
know in case DDL of table is required. It has all nullable columns and no index at all. Since it is 9i I am unable to use MERGE effectively in this case
I'm trying to group sets of data based on time separations between records and then count how many records are in each group.
In the example below, I want to return the count for each group of data, so Group 1=5, Group 2=5 and Group 3=5
SELECT AREA_ID AS "AREA ID", LOC_ID AS "LOCATION ID", TEST_DATE AS "DATE", TEST_TIME AS "TIME" FROM MON_TEST_MASTER WHERE AREA_ID =89 AND LOC_ID ='3015' AND TEST_DATE ='10/19/1994';
[code]....
Group 1 = 8:00:22 to 8:41:22
Group 2 = 11:35:47 to 11:35:47
Group 3 = 15:13:46 to 15:13:46
Keep in mind the times will always change, and sometime go over the one hour mark, but no group will have more then a one hour separation between records.
I read that rownum is applied after the selection is made and before "order by". So, in order to get the sum of salaries for all employees in all departments with a row number starting from 1, i wrote :
select ROWNUM,department_id,sum(salary) from employees group by department_id
If i remove rownum, it gives the correct output. Why can't rownum be used here ?
I have the following set of numbers that i am passing in as one input into a stored procedure.
234,456,234,456,567
Now i want to take this list of numbers and use it in an IN statement:
select * from table where column_a in (P_INPUT);
however, when i try this, it give me an invalid error. I have tried inserting single quote around each value and get the same invalid error. I tried a To_char around my column, which solved the error, but it never finds a match!
I want to get 10 random numbers from existing 100 numbers. How can we get/generate random numbers ?
for example I have a table with customer ID, customer Name, having 100 record. We want 10 customers ID randomly from that 100 record not repeated any number. Have any command or procedure for that ?
I am creating a function to sum five numbers (less 1). Is it possible to have an array of numbers in an SQL function, and how would this be implemented?
Here is the screenshot of my output (I cannot embed links until 5 posts!): flic.kr/p/eaSHBP
CREATE OR REPLACE FUNCTION sumfivenumbers ( n1 NUMBER, n2 NUMBER, n3 NUMBER, n4 NUMBER, n5 NUMBER) RETURN NUMBER IS Sumnums NUMBER; BEGIN SELECT SUM(n1+n2+n3+n4+n5-1) INTO Sumnums FROM DUAL; DBMS_OUTPUT.PUT_LINE(Sumnums); RETURN 1; END sumfivenumbers; / SELECT sumfivenumbers(5,5,5,5,5) AS "Five Numbers less 1" FROM DUAL;
I have a requirement to display numbers as equivalent alphabets , like if the stored value is 1 then it should display as 'A' ,2 means 'B' ,is there a way to find out.
CREATE TABLE APS ( ITEM_NO NUMBER, ITEM_NAME VARCHAR2(12)) INSERT INTO APS (ITEM_NO,ITEM_NAME) VALUES (1,'TEST1'); INSERT INTO APS (ITEM_NO,ITEM_NAME) VALUES (2,'TEST2'); INSERT INTO APS (ITEM_NO,ITEM_NAME) VALUES (3,'TEST3'); INSERT INTO APS (ITEM_NO,ITEM_NAME) VALUES (4,'TEST4');
-- The output to be is.
item_no , item_name A TEST1 B TEST2 C TEST3 D TEST4
I tried to convert numbers to words, it shows the below error.
SQL*Plus: Release 10.2.0.1.0 - Production on Fri Jul 6 11:00:29 2012
Copyright (c) 1982, 2005, Oracle. All rights reserved.
Connected to: Oracle Database 10g Enterprise Edition Release 10.2.0.5.0 - Production With the Partitioning, OLAP, Data Mining and Real Application Testing options
SQL> SELECT TO_CHAR (TO_DATE (2447834, 'j'), 'jsp') FROM DUAL;
TO_CHAR(TO_DATE(2447834,'J'),'JSP') --------------------------------------------------------------------------- two million four hundred forty-seven thousand eight hundred thirty-four
SQL> SELECT TO_CHAR (TO_DATE (244783400, 'j'), 'jsp') FROM DUAL; SELECT TO_CHAR (TO_DATE (244783400, 'j'), 'jsp') FROM DUAL * ERROR at line 1: ORA-01830: date format picture ends before converting entire input string
Here i face probelm that he numbers must be follw by DOT "." , this is not correct if the statment only conatines numbers without DOT that not extract. As the
SELECT REGEXP_SUBSTR ( 'hello to 8898989898989 jkjk nnnm mnj' , '([0-9]+.[0-9]*)' || -- Starts with digit(s) (may or may not have digits after .) '|' || -- or '(.[0-9]+)' -- starts with decimal point ) AS result FROM dual ;
but mean i have to add . after numbers . as follow
SELECT REGEXP_SUBSTR ( 'hello to 8898989898989 jkjk nnnm mnj' , '([0-9]+.[0-9]*)' || -- Starts with digit(s) (may or may not have digits after .) '|' || -- or '(.[0-9]+)' -- starts with decimal point ) AS result FROM dual ;
Update ACT.CUSTOMER_CLIENT_REFERENCE Set ORIGINAL_SOURCE_FG = 'N', CANADIAN_ULTIMATE_REFERENCE_FG = 'N', LUDT = SYSDATE, CLT_NO = (Select clt_no from client.client where clt_no between 701885 and 705287) Where Exists (Select 1 from client.client where clt_ofc_no = 19 and clt_no between 701885 and 705287)
But the CLT_NO = .... line is giving me this error: ORA-01427: single-row subquery returns more than one row
what i am trying to do is insert all the client numbers between 701885 and 705287 into ACT.CUSTOMER_CLIENT_REFERENCE
I found a message which explain how to spell out numbers to words. I'm french and the purpose of my question is how to convert numbers to word (to print cheque) but in french the function found in the newsgroup was :
I am developing a form where I need to add Numbers.In fact we have a bag of Cones that contain 24 cones.In normal calculation when I add numbers for example
5.24 Plus 5.24 it will give the result 10.48
I Need the appropriate method to calculate if I add these two numbers it should give the result 5.24 Plus 5.24 the result should be 12
