SQL & PL/SQL :: UPDATE Query Opens Multiple Oracle Sessions
Feb 24, 2011
We recently migrated from 9i to 11g.
One UPDATE query runs for 2min and it opens multiple oracle sessions. Almost 40 sessions. Once the UPDATE is done, the sessions close.
When monitoring V$SESSION, found that the newly opened sessions have a PROGRAM value like "oracle@server (P001)"
The UPDATE query is as below. The query works fine, no issue with performance.
SET t1.text =
( SELECT text
FROM table2 t2
WHERE t1.col1 = t2.col1
AND t1.col2 = t2.col2
AND ROWNUM < 2
[code].......
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Feb 25, 2011
I was just wondering how Oracle manages multiple sessions in a database performing DML. I believe this is related to 'Read Consistency' and I tried to search for the same but could not get any satisfactory online documents.
CASE 1:
user A logs in to a database1
issues select on table A and then inserts 4 rows
user B logs in to databse1
issues select on table A and then inserts 5 rows
issues rollback
user C logs in to a database1
issues select on table A and then inserts 6 rows
issues commit
How many rows can user C see in the table A when he issues select?
CASE 2:
user A logs in to a database1
issues select on table A and then inserts 4 rows
user B logs in to databse1
issues select on table A and then inserts 5 rows
user C logs in to a database1
user B issues rollback
user C issues select on table A and then inserts 6 rows
issues commit
How many rows can user C see in the table A when he issues select?
NOTE: All the users are currently logged in to the same database and none has logged out.
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Nov 16, 2012
We are experiencing a problem with SSO causing 2nd or 3rd concurrent Oracle sessions to hang. The Oracle application hangs during loading and the task manager has to be used to close the application.
I have tested logging onto our application servers using SSO and I cannot load more than 3 concurrent Oracle sessions. When I bypass the SSO and logon to the same server I can load more than 20.
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Jan 27, 2012
Actully i am updating two table of data.. but below error message came..
update (select ename, dname
from emp e, dept d
where e.deptno = d.deptno
and empno = 7788)
set ename = 'X', dname = 'Y'
/
Error at line 1
ORA-01776: cannot modify more than one base table through a join view
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Apr 5, 2013
Share a query for inactive sessions consuming memory? I have found many inactive sessions with the following query and would like to join this information with memory usage as well.
select username, machine, program, to_char(LOGON_TIME, 'hh24:mi:ss DD-MM-YYYY'), LAST_CALL_ET/60, status from gv$session where status='INACTIVE';
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May 30, 2013
i am reading the columns value from different table but i want to update it with single update statement. such as how to update multiple columns (50 columns) of table with single update statement .. is there any sql statement available i know it how to do with pl/sql.
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Mar 21, 2011
I have one doubt about update command in sql. How to update the multiple rows with different values using update statment.
Eg:-
SQL> set linesize 500;
SQL> set pagesize 500;
SQL> select * from emp;
SQL> select empno,ename,sal from emp;
SQL> select empno,ename,sal from emp;
EMPNO ENAME SAL
---------- ---------- ----------
7839 KING 5000
7698 BLAKE 2850
7782 CLARK 2450
7566 JONES 2975
7654 MARTIN 1250
[Code]....
The above table contains 14 records. Now i would like to update the salary column with different values like
EMPNO SAL
===========
7839 18000
7698 20000
7782 5000
...
...
...
7934 25000
How to update above values with single update query.
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Jul 19, 2011
I have a column "empno" in EMP table and "deptno" in DEPT table . I want to update both the columns with single UPDATE statement. With out a creation of stored procedure or view(updating it through view).
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Mar 8, 2012
I have been given a task to produce an ad-hoc report based on the following conditions (I will give you the structure of the table and details in the table below the requirements)
Requirements: Adhoc Report for Audit on CIT Income Allocation
1. Select from the RETURNS table:
•Id > 3600000 and
•Prog_program_cd = '01' and
[code]...
3.If there are multiple entries from the same account and tax year, only retain the latest record: From the records selected in step 2, if there are multiple records with the same Acct_Id and Period_end_date, only retain the record with the most recent Status_date (i.e. MAX value on the date).
4. Using the results from step 3, link to the applicable RETURN_LINE_ITEMS table where:
•RETURNS.Id = RETURN_LINE_ITEMS.Rtrn_Id
5. From the selected return on RETURN_LINE_ITEMS table, retrieve records where (value on Sch 000 Line 062 > 500,000) and (value on Sch 000 Line 066 < value on Sch 000 Line 062) :
•Sched_nbr = '000', and Litm_line_item_nbr = '062', and Active_ind = 'Y', get Revise_val_amt as 'ab_taxable_income'
•Sched_nbr = '000', and Litm_line_item_nbr = '066', and Active_ind = 'Y', get Revise_val_amt as 'amt_taxable_in_ab'
[code]...
So when you run the scripts above, the tables are created (I have tested it in TOAD) Now let's feed data into both the tables
RETURNS table:
insert into RETURNS
VALUES
(3602448 , '01' ,288151,3876821,9345370 , 403232531, 1, 'TAXPAYER' ,12/4/2008 ,'N', 'Y','N','ASSESSED', 2/18/2009,'SANDEEP',1/2/2008,1/2/2009,
'PRINTED','2/18/2009, 6043073664,'PAPER', 'NOTICE','N');
[code]...
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Apr 13, 2011
This is my working query in ms access...
UPDATE Caxnode AS A INNER JOIN Caxnode AS B ON A.node_alias = B.node_alias SET A.partition_Type = 'LDOM', A.node_mode = 'LOGICAL', A.host_id = b.host_id, A.num_of_proc = b.num_of_proc WHERE (((A.node_mode)='virtual' Or (A.node_mode)='regular') AND ((B.partition_Type)='LDOM'));
This doesn't work in oracle, I Googled and read that update doesn't work with inner join in oracle.
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Oct 15, 2012
In Oracle 11g/R2, I created replica of HR.Employees table & executed the following statement (+Although using SUM() function is non-logical in this case, but just testifying the result+)
STEP - 1
SELECT /+ RESULT_CACHE */ employee_id, first_name, last_name, SUM(salary)*
FROM HR.Employees_copy
WHERE department_id = 20
GROUP BY employee_id, first_name, last_name;
EMPLOYEE_ID FIRST_NAME LAST_NAME SUM(SALARY)
-------------------------------------------------------------------------------------------------------
202 Pat Fay 6000
201 Michael Hartstein 13000
Elapsed: 00:00:00.01
Execution Plan
----------------------------------------------------------
Plan hash value: 3837552314
--------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 2 | 130 | 4 (25)| 00:00:01 |
| 1 | RESULT CACHE | 3acbj133x8qkq8f8m7zm0br3mu | | | | |
| 2 | HASH GROUP BY | | 2 | 130 | 4 (25)| 00:00:01 |
|* 3 | TABLE ACCESS FULL | EMPLOYEES_COPY | 2 | 130 | 3 (0)| 00:00:01 |
Statistics
----------------------------------------------------------
0 recursive calls
0 db block gets
0 consistent gets
0 physical reads
0 redo size
*690* bytes sent via SQL*Net to client
416 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
2 rows processed
STEP - 2
INSERT INTO HR.employees_copy
VALUES(200, 'Dummy', 'User','Dummy.User@email.com',NULL, sysdate, 'MANAGER',5000, NULL,NULL,20);
STEP - 3
SELECT /*+ RESULT_CACHE */ employee_id, first_name, last_name, SUM(salary)
FROM HR.Employees_copy
WHERE department_id = 20
GROUP BY employee_id, first_name, last_name;
EMPLOYEE_ID FIRST_NAME LAST_NAME SUM(SALARY)
--------------------------------------------------------------------------------------------------
202 Pat Fay 6000
201 Michael Hartstein 13000
200 Dummy User 5000
Elapsed: 00:00:00.03
Execution Plan
----------------------------------------------------------
Plan hash value: 3837552314
--------------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
--------------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 3 | 195 | 4 (25)| 00:00:01 |
| 1 | RESULT CACHE | 3acbj133x8qkq8f8m7zm0br3mu | | | | |
| 2 | HASH GROUP BY | | 3 | 195 | 4 (25)| 00:00:01 |
|* 3 | TABLE ACCESS FULL| EMPLOYEES_COPY | 3 | 195 | 3 (0)| 00:00:01 |
Statistics
----------------------------------------------------------
0 recursive calls
0 db block gets
4 consistent gets
0 physical reads
0 redo size
*714* bytes sent via SQL*Net to client
416 bytes received via SQL*Net from client
2 SQL*Net roundtrips to/from client
0 sorts (memory)
0 sorts (disk)
3 rows processed
In the execution plan of STEP-3, against ID-1 the operation RESULT CACHE is shown which shows the result has been retrieved directly from Result cache. Does this mean that Oracle Server has Incrementally Retrieved the resultset?
Because, before the execution of STEP-2, the cache contained only 2 records. Then 1 record was inserted but after STEP-3, a total of 3 records was returned from cache. Does this mean that newly inserted row is retrieved from database and merged to the cached result of STEP-1?
If Oracle server has incrementally retrieved and merged newly inserted record, what mechanism is being used by the Oracle to do so?
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Apr 22, 2011
our db shows more than 200 INACTIVE Sessions ; and the DBA plans to reboot the db to get rid of these sessions . Can we not KILL these sessions and avoid the reboot ?
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Jul 8, 2009
I have developed a form which has webutil objects in it, and it is working fine on my local machine. When I deploy my form to my application server it opens up a blank page. I have configured the webutils in the app server as per the document and made entries into formsweb.cfg regarding frmwebutil.jar,jacob.jar. Does the dev suite need to be installed in the server for the webutils to run properly?
Also I watched my java console as I opened my form and I am pasting the contents below:
-----------------
Loading frmwebutil.jar from JAR cache
Loading jacob.jar from JAR cache
proxyHost=null
proxyPort=0
connectMode=HTTP, native.
Forms Applet version is : 10.1.2.3
[code]...
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Mar 30, 2011
I have a RAC cluster with several databases on it. One of my DB's, when starting the OEM in Internet Explorer, will never open the HOME page. I get the login page, and enter sys/password > SYSDBA. The progress bar on the bottom of browser will slowly move for a period of time, then I get the infamous 404 screen. dbconsole IS started...even stopped and restarted....
Thinking I need to drop and recreate the OEM repository using emca....have the commands to use oin a standalone world, but need some pointers for RAC world.
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Aug 19, 2010
I am using oracle 10g as server in my lab. I faced some problems initially, but later after increasing the USERS tablespace it is working fine.
But there is still one problem. During the query execution some queries will be blocked and it doesn't leave any consequent queries to execute from the same user.
The blocked sessions will be displayed in the admin page under blocking sessions link. There is a option to kill the session. But when i do that, it affects all the users and the connection will be lost to all the users. again I have startup the database from beginning.
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Jun 29, 2013
I have a requirement wherein onclick of button I want to open/close list/popup (which is displayed below button, just like in select list) and can select any item from list to do some action.
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Nov 22, 2010
I have some questions about Oracle + EMC shared storage. I have Oracle 11gR1 RAC (2nodes) + ASM environment with shared shorage EMC Clariion AX4.
The database is running no archivelog mode. I'd like to implement point-in-time recovery using Snap View snapshots.
Currently my AX4 platform has the following LUNS:
LUN1 - registry 1
LUN2 - registry 2
LUN3 - vote 1
LUN4 - vote 2
LUN5 - vote 3
LUN6 - ASM - DISKGROUP DATA DISK DATA01 (actual db datafiles)
LUN7 - ASM - DISKGROUP DATA DISK DATA02 (actual db datafiles)
Using source LUNs in consistent session will take sync snapshots of all the LUNs working against my database. Once something happens with database, the LUNs can be returned to specific point in time when snapshot consistent session was taken and I'm expecting the database will up and continue to work.
Questions:
1. Is my approach correct at all? (The database is running noarchivelog mode, not dealing with hot backups. The recovery point in time implemented purely via EMC snapshot consistent sessions.)
2. The AX4 platform has a limit 8 source LUNs in session. If I understand it correctly, I can't place more than 8 LUNs in session. What will be the workaround if my database will occupy more than 8 LUNs, I'd like to take their consistent snapshot; for example:
LUN1 - registry 1
LUN2 - registry 2
LUN3 - vote 1
LUN4 - vote 2
LUN5 - vote 3
LUN6 - ASM - DISKGROUP DATA DISK DATA01 (actual db datafiles)
LUN7 - ASM - DISKGROUP DATA DISK DATA02 (actual db datafiles)
LUN8 - ASM - DISKGROUP DATA DISK DATA03 (actual db datafiles)
LUN9 - ASM - DISKGROUP DATA DISK DATA04 (actual db datafiles)
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Feb 12, 2013
how to combine APEX 4.2 with jquery mobile componentsOn one page with a hole bunch of components there is also a popup-div<div id="myPopup" data-role="popup">
<!-- close button, safe button, input field and short list... -->
</div>It gets opened with js: $( "#myPopup" ).popup( "open" );
This all works fine, besides the face that it only works after refreshing the page! The page gets loaded via js: $.mobile.changePage('f?p='+ $v('pFlowId') +':20:' + $v('pInstance') { transition:"slide", reloadPage:true });...
which also works fine so far. That same problem I had before when I was using a dialog instead of the popup. - only showing after refreshing the page.
This certainly must have something to do with how JQM loads and renders the page (besides the APEX-job) - a rather basic issue. I have also tried different ways of calling the page, with no difference to that problem.
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May 6, 2010
I have a table formatted like this
ID|First Name|Second Name
1|X|X
2|X|X
3|X|X
4|X|X
and I want to insert First Name and Second Name records using the ID as the reference. The new data is currently in a .csv file, but I could put them in another table if that's easier.
ID|First Name|Second Name
1|Adam|Adamson
2|Ben|Benson
3|Chris|Christophers
4|Dave|Davidson
I understand how to do individual updates, I want to know how it is possible for me to do this as one query, as I have several thousand records to update.
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Dec 12, 2011
how to over come this error, because i need to update only 3 columns in the table and iam getting error when iam updating like this
update country1 set cname='japan','usa'
where cid=100,101
ERROR:ORA-01747,INVALID USER.TABLE.COLUMN,TABLE.COLUMN,OR COLUMN
SPECIFICATION
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Jun 11, 2011
I have a requirement to load data into database column based on the value coming from input field.
E.g. :
Input:
EmpNo, DeptNo, Sal
1234, 10,1000
1234,20,2000
1234,30, 3000
1234,40,4000
2345,10,100
2345,20,200
2345,30,300
Output:
Emp No, Dept_10_Sal,Dept_20_Sal,Dept_30_Sal,Dept_40_Sal
1234, 1000, 2000,3000,4000
2345,100, 200, 300,0
Here we have more than 500 columns like this Dept_10_Sal, Dept_20_Sal........Dept_500_Sal.
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May 4, 2011
Suppose I have a table.
SQL> select * from emp;
EMPNO ENAME DEPTNO SAL
---------- ---------- ---------- ----------
1 RN 10 10
3 C 20 40
4 A 10 20
5 B 20 100
6 D 10 11
7 S 30 300
6 rows selected
Now I need to update the table as for all employees will get sal 100 for depetno=10 and employees of deptno=20 will get sal=200. I need to update this with a single query.
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Feb 1, 2012
It started out pretty simple where I had to update about 40 contacts in the database and I would have 40 separate update statements I would run. The task has jumped to about 300 contacts and I don't want to run 300 update statements. I would like to run this all at once. For example:
update contact
set name = 'Name1'
where row_id = 'row_id1'
update contact
set name = 'Name2'
where row_id = 'row_id2'
update contact
set name = 'Name3'
where row_id = 'row_id3'
My DB is oracle 10, and TOAD is version 9.
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Jun 17, 2011
I'm updating a big table with an other one (see topic
[URL]........
I was wondering if I could do it without using the WHERE EXISTS condition. Let me explain better:
create table TEST
(
ENT_SIG VARCHAR2(10),
EMP_ID VARCHAR2(10),
DATE_START DATE,
DATE_END DATE
);
create table TEST2
(
ENT_SIG VARCHAR2(10),
EMP_ID VARCHAR2(10),
DATE_START DATE,
DATE_END DATE
);
insert into TEST (ENT_SIG, EMP_ID, DATE_START, DATE_END)
values ('014', '120', TO_DATE('20080101','YYYYMMDD'), TO_DATE('20080131','YYYYMMDD'));
insert into TEST (ENT_SIG, EMP_ID, DATE_START, DATE_END)
values ('014', '121', TO_DATE('20080201','YYYYMMDD'), TO_DATE('20080228','YYYYMMDD'));
[code].....
I'm asking if there's a way to do this:
update test a
set (date_Start, date_end) = (select date_start, date_end
from test2 b
where b.emp_id = a.emp_id
[code].......
Without using the WHERE EXISTS. I don't want to make two accesses to table2, I would like instead to do something like "If subquery returns a row, use it, else keep what you have in destination table".
Is there a way to do it without entering test2 twice?
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Oct 22, 2011
I need to write a script which copies 4 col data from one table to another table. there are three tables
cwat_curr_mst and cwat_assigned_customer and cwat_assignment_mst.
Cwat curr mst has PK curr_id and cwat_assigned_customer has PK assignment_id.
Also cwat_assigned_customer has customer_id.
In cwat_assignment_mst has Curr_id and Assignment_ID.
cwat_curr_mst and cwat_assigned_customer tables has 4 cols in common
they are
ASRT_SNM_NO, SNM_NO, FLORIDA_NO, CBRN_NO.
So from curr_mst all these 4 cols data needs to come/copy into cwat_assigned_customer.
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Aug 26, 2010
I am issuing an update statement in which I am using multiple tables it is giving me an error " set keyword missing"
update E_CONT_DETAIL_NUMB_VALUE ecdnv, y_obj_category yoc, t_contact tc
set ecdnv.ContTPRecCount = 1000
where tc.default_category_id = (select primary_key from y_ojb_category where tree_position = 'CONT')
and ecdnv.detail_field_id=tc.default_category_id;
update E_CONT_DETAIL_NUMB_VALUE ecdnv, y_obj_category yoc, t_contact tc
*
ERROR at line 1:
ORA-00971: missing SET keyword
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Nov 21, 2012
I have to write a "after update trigger". Here, i have to update the stock table by other inventory tables (by complex query).
I have written trigger below. how to make it correct?
create or replace trigger trg_stk_upd_pur
after update on O_STOCK_EFFECTS
REFERENCING NEW AS new OLD AS old
FOR EACH ROW
[Code]....
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Mar 3, 2010
This is a surprisingly common one I've found on the web...even on devshed forum
I am updating one table from another (Updating Table A from Table B):
Table A
ID, Value
-- -----
1 A
1 A
2 B
Table B
ID, Value
-- -----
1 Animal
2 Box
Table A (modified)
ID, Value, Name
1 A Animal
1 A Animal
2 B Box
No I need to update a new column in Table A with the value in Table B.Value where the ID's from both tables match. Problem is: When I do this I get multiple rows and hence Oracle won't let me update this column. Now, I keep reading that for these types of updates, there has to be a one-to-one relationship...
Is this true...is there anyway of telling Oracle to update wherever it finds that ID, regardless of how many duplicate ID's there are?
This is quite a frustrating problem and most of the sites that I've looked for solutions try get the query one-to-one...problem is...with my table sets it's impossible to do that - I need to update wherever the id's match (even if it return multiple rows).
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Feb 27, 2013
I want to update records which returns more than 1 row using store procedure. i tried with ref_cursor but failed to update,
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Feb 27, 2013
i am trying to update multiple records using store procedure but failed to achieve
for example my source is
emp_name sal
abhi 2000
arti 1500
priya 1700
i want to increase salary of emp whose salary is less than 2000 it means rest two salary should get update..using stored procedure only
i have tried following code
create or replace procedure upt_sal(p_sal out emp.sal%type, p_cursor out sys_refcursor)
is
begin
open p_cursor for
select sal into p_sal from emp;
if sal<2000 then
update emp set sal= sal+200;
end i;f
end;
and i have called the procedure using following codes
set serveroutput on
declare
p_sal emp.sal%type;
v_cursor sys_refcursor;
begin
upt_sal(p_sal,v_cursor);
fetch v_cursor into p_sal;
dbms_output.put_line(p_sal);
end;
the program is executing but i should get o/p like this after updating
1700
1900
but i am getting first row only
2000
and record is not updating...
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