ROWNUM in update statement

I have oracle default HR schema where there is a table named DEMO_STATES.
I would like to make sql update based on ROWNUM, my first try was:
UPDATE DEMO_STATES SET STATE_NAME = 'some state name', ST='AL'
WHERE ROWNUM = '1';
1 row updated. Nice and then:
UPDATE DEMO_STATES SET STATE_NAME = 'some state name', ST='AL'
WHERE ROWNUM = '2';
0 rows updated.
How should I update rows with WHERE ROWNUM pseudo colomn condition?
Best Regards
Zimny Dran
PS. I am using such way, because there is no primary column in this table and I need to distinguish row I am updateing.
Message was edited by:
user528364

Well, I am writeing user interface for db. User can choose row and edit. I would like to make such possibility, even if there is no PK and there are few identical rows. However, if one particular row has been selected, only it should be updated without other rows (event if they are identical but not selected for editing/updateing).
So I guess only one solution in Oracle is ROWID?

Similar Messages

How to use rownum=2 in update statement ?

Hi all,
we are migrating the data from mainframe to oracle. migration team extracted the data into flat file. we are using this flat file to load in oracle.Finacle have menu option to load data from flat file to corresponding oracle tables.whenever i given this flat file to Menu it will give error report like below if any rows have error.
here "A/c. Opening Matrix" is the error.
error report:-
A/c. Opening Matrix
The Above Error Was For record No: 1
A/c. Opening Matrix
The Above Error Was For record No: 2
we are extracting and storing all the error message and corresponding record no in shell script as below.
err_msg=`echo ${error_msg[i]}`
rec_num=`echo ${error_msg[i]}| cut -d: -f2`
we need to update the upload status either upload success or failure and error message in upload history table. iam writing the update statement as below.
update statement:-
update upld_hist set upld_status='ERR' ,upld_err='$err_msg' where rownum=$rec_num;
This is statement is updating only for rownum=1. other than this it is not updating the table. Please suggest me how to update the rows based on rownum?
Thanks,
Venkat Vadlamudi

868591 wrote:
Hi all,
we are migrating the data from mainframe to oracle. migration team extracted the data into flat file. we are using this flat file to load in oracle.Finacle have menu option to load data from flat file to corresponding oracle tables.whenever i given this flat file to Menu it will give error report like below if any rows have error.
here "A/c. Opening Matrix" is the error.
error report:-
A/c. Opening Matrix
The Above Error Was For record No: 1
A/c. Opening Matrix
The Above Error Was For record No: 2
we are extracting and storing all the error message and corresponding record no in shell script as below.
err_msg=`echo ${error_msg[i]}`
rec_num=`echo ${error_msg[i]}| cut -d: -f2`
we need to update the upload status either upload success or failure and error message in upload history table. iam writing the update statement as below.
update statement:-
update upld_hist set upld_status='ERR' ,upld_err='$err_msg' where rownum=$rec_num;
This is statement is updating only for rownum=1. other than this it is not updating the table. Please suggest me how to update the rows based on rownum?
Thanks,
Venkat VadlamudiUse Analytic ROW_NUMBER() ..
http://docs.oracle.com/cd/E11882_01/server.112/e26088/functions156.htm#i86310

Sender JDBC: help to construct Update statement

Hi,
I need help in writing a update statement to DB2 database in sender JDBC adapter.
The sender adapter picks up only few records say 10 at a time which match the Select query condition. So I would need to update only those selected "n" records and not all the records that match the Select query condition.
Select looks like :
Select * from <table> where <condition> fetch first <n> rows only.
But it is not allowing the following update
update <table> set <field> = <value> where <field> IN (Select * from <table> where <condition> fetch first <n> rows only)
The above statement errors because DB2 does not allows u201CFetchu201D statement within the update sub query.
Any pointers to a write update statement for n records is highly appreciatedu2026
~SaNvu2026

Hi Santosh,
In JDBC Sender Adapter provide the following select & update statements
Select Statement:
select * from <table> where <condition> AND ROWNUM<N (N==No.of Rows)
Update Statement:
update <table> set <field> = <value> where <field> IN (Select * from <table> where <condition> AND ROWNUM<N)
(N==No.of Rows)
And for the error you are facing is because of the server communication link failure between the two systems.
Check the connections and try to stop & start communication channels once.
Regards
Venkat Rao .G

Update statement for multiple records

i have table a and table b
common col in both the tables is emp_id
in table b i have district_id
which i want to update in table a.... column district_id for all the employees
how to write update statement for this
Edited by: user10873676 on Oct 17, 2011 8:00 AM

Based on your current description, we have something like this...
SQL> create table a (emp_id number)
2 /
Table created.
SQL>
SQL> create table b (emp_id number, district_id number)
2 /
Table created.
SQL>
SQL> insert into a (emp_id)
2 select rownum from dual connect by rownum <= 10
3 /
10 rows created.
SQL>
SQL> insert into b (emp_id, district_id)
2 select rownum, 10-rownum from dual connect by rownum <= 10
3 /
10 rows created.
SQL>
SQL> update b
2 set district_id = 1
3 /
10 rows updated.
SQL>
SQL> select * from a;
    EMP_ID
         1
         2
         3
         4
         5
         6
         7
         8
         9
        10
10 rows selected.
SQL> select * from b;
    EMP_ID DISTRICT_ID
         1           1
         2           1
         3           1
         4           1
         5           1
         6           1
         7           1
         8           1
         9           1
        10           1
10 rows selected.Which I'm sure is NOT what you want as the update on table b has nothing to do with table a, and we have no idea what the district_id should be updated with.

Update statement takes too long to run

Hello,
I am running this simple update statement, but it takes too long to run. It was running for 16 hours and then I cancelled it. It was not even finished. The destination table that I am updating has 2.6 million records, but I am only updating 206K records. If add ROWNUM <20 to the update statement works just fine and updates the right column with the right information. Do you have any ideas what could be wrong in my update statement? I am also using a DB link since CAP.ESS_LOOKUP table resides in different db from the destination table. We are running 11g Oracle Db.
UPDATE DEV_OCS.DOCMETA IPM
SET IPM.XIPM_APP_2_17 = (SELECT DISTINCT LKP.DOC_STATUS
FROM [email protected] LKP
WHERE LKP.DOC_NUM = IPM.XIPM_APP_2_1 AND
IPM.XIPMSYS_APP_ID = 2
WHERE
IPM.XIPMSYS_APP_ID = 2;
Thanks,
Ilya

matthew_morris wrote:
In the first SQL, the SELECT against the remote table was a correlated subquery. the 'WHERE LKP.DOC_NUM = IPM.XIPM_APP_2_1 AND IPM.XIPMSYS_APP_ID = 2" means that the subquery had to run once for each row of DEV_OCS.DOCMETA being evaluated. This might have meant thousands of iterations, meaning a great deal of network traffic (not to mention each performing a DISTINCT operation). Queries where the data is split between two or more databases are much more expensive than queries using only tables in a single database.Sorry to disappoint you again, but with clause by itself doesn't prevent from "subquery had to run once for each row of DEV_OCS.DOCMETA being evaluated". For example:
{code}
SQL> set linesize 132
SQL> explain plan for
2 update emp e
3 set deptno = (select t.deptno from dept@sol10 t where e.deptno = t.deptno)
4 /
Explained.
SQL> @?\rdbms\admin\utlxpls
PLAN_TABLE_OUTPUT
Plan hash value: 3247731149
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Inst |IN-OUT|
| 0 | UPDATE STATEMENT | | 14 | 42 | 17 (83)| 00:00:01 | | |
| 1 | UPDATE | EMP | | | | | | |
| 2 | TABLE ACCESS FULL| EMP | 14 | 42 | 3 (0)| 00:00:01 | | |
| 3 | REMOTE | DEPT | 1 | 13 | 0 (0)| 00:00:01 | SOL10 | R->S |
PLAN_TABLE_OUTPUT
Remote SQL Information (identified by operation id):
3 - SELECT "DEPTNO" FROM "DEPT" "T" WHERE "DEPTNO"=:1 (accessing 'SOL10' )
16 rows selected.
SQL> explain plan for
2 update emp e
3 set deptno = (with t as (select * from dept@sol10) select t.deptno from t where e.deptno = t.deptno)
4 /
Explained.
SQL> @?\rdbms\admin\utlxpls
PLAN_TABLE_OUTPUT
Plan hash value: 3247731149
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Inst |IN-OUT|
| 0 | UPDATE STATEMENT | | 14 | 42 | 17 (83)| 00:00:01 | | |
| 1 | UPDATE | EMP | | | | | | |
| 2 | TABLE ACCESS FULL| EMP | 14 | 42 | 3 (0)| 00:00:01 | | |
| 3 | REMOTE | DEPT | 1 | 13 | 0 (0)| 00:00:01 | SOL10 | R->S |
PLAN_TABLE_OUTPUT
Remote SQL Information (identified by operation id):
3 - SELECT "DEPTNO" FROM "DEPT" "DEPT" WHERE "DEPTNO"=:1 (accessing 'SOL10' )
16 rows selected.
SQL>
{code}
As you can see, WITH clause by itself guaranties nothing. We must force optimizer to materialize it:
{code}
SQL> explain plan for
2 update emp e
3 set deptno = (with t as (select /*+ materialize */ * from dept@sol10) select t.deptno from t where e.deptno = t.deptno
4 /
Explained.
SQL> @?\rdbms\admin\utlxpls
PLAN_TABLE_OUTPUT
Plan hash value: 3568118945
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time | Inst |IN-OUT|
| 0 | UPDATE STATEMENT | | 14 | 42 | 87 (17)| 00:00:02 | | |
| 1 | UPDATE | EMP | | | | | | |
| 2 | TABLE ACCESS FULL | EMP | 14 | 42 | 3 (0)| 00:00:01 | | |
| 3 | TEMP TABLE TRANSFORMATION | | | | | | | |
| 4 | LOAD AS SELECT | SYS_TEMP_0FD9D6603_1CEEEBC | | | | | | |
| 5 | REMOTE | DEPT | 4 | 80 | 3 (0)| 00:00:01 | SOL10 | R->S |
PLAN_TABLE_OUTPUT
|* 6 | VIEW | | 4 | 52 | 2 (0)| 00:00:01 | | |
| 7 | TABLE ACCESS FULL | SYS_TEMP_0FD9D6603_1CEEEBC | 4 | 80 | 2 (0)| 00:00:01 | | |
Predicate Information (identified by operation id):
6 - filter("T"."DEPTNO"=:B1)
Remote SQL Information (identified by operation id):
PLAN_TABLE_OUTPUT
5 - SELECT "DEPTNO","DNAME","LOC" FROM "DEPT" "DEPT" (accessing 'SOL10' )
25 rows selected.
SQL>
{code}
I do know hint materialize is not documented, but I don't know any other way besides splitting statement in two to materialize it.
SY.

Decode function in Update statement

Hello everyone,
I'm trying to write a query where I can update a pastdue_fees column in a book_trans table based on a difference between return_dte and due_dte columns.
I am using Oracle SQL. This is what I have so far for my decode function:
SQL> SELECT
2 DECODE(SIGN((return_dte - due_dte)*2),
3 '-1', '0',
4 '1', '12', 'Null')
5 FROM book_trans;
DECO
Null
12
Null
0
So the logic is that if the sign is -1, the value in return_dte column should be 0; if it's +1 then it's 12 and everything else is Null.
So now, I need to enter my decode function into the update statement to update the columns. However, I get error messages.
The logic should be:
UPDATE book_trans SET PastDue_fees = decode(expression)
I've given it a couple of different tries with the following results:
SQL> UPDATE book_trans
2 SET pastdue_fees = SELECT
3 DECODE(SIGN((return_dte - due_dte)*2),
4 '-1', '0',
5 '1', '12', 'Null')
6 FROM book_trans;
SET pastdue_fees = SELECT
ERROR at line 2:
ORA-00936: missing expression
SQL> UPDATE book_trans
2 SET pastdue_fees =
3 DECODE(SIGN((return_dte - due_dte)*2),
4 '-1', '0',
5 '1', '12', 'Null')
6 FROM book_trans;
FROM book_trans
ERROR at line 6:
ORA-00933: SQL command not properly ended
Any help or tips would be greatly appreciated as I've been taking SQL for about six weeks and not very proficient!
Thanks!

882300 wrote:
Hello everyone,
I'm trying to write a query where I can update a pastdue_fees column in a book_trans table based on a difference between return_dte and due_dte columns.
I am using Oracle SQL. This is what I have so far for my decode function:
SQL> SELECT
2 DECODE(SIGN((return_dte - due_dte)*2),
3 '-1', '0',
4 '1', '12', 'Null')
5 FROM book_trans;
DECO
Null
12
Null
0
So the logic is that if the sign is -1, the value in return_dte column should be 0; if it's +1 then it's 12 and everything else is Null.
So now, I need to enter my decode function into the update statement to update the columns. However, I get error messages.
The logic should be:
UPDATE book_trans SET PastDue_fees = decode(expression)
I've given it a couple of different tries with the following results:
SQL> UPDATE book_trans
2 SET pastdue_fees = SELECT
3 DECODE(SIGN((return_dte - due_dte)*2),
4 '-1', '0',
5 '1', '12', 'Null')
6 FROM book_trans;
SET pastdue_fees = SELECT
ERROR at line 2:
ORA-00936: missing expression
SQL> UPDATE book_trans
2 SET pastdue_fees =
3 DECODE(SIGN((return_dte - due_dte)*2),
4 '-1', '0',
5 '1', '12', 'Null')
6 FROM book_trans;
FROM book_trans
ERROR at line 6:
ORA-00933: SQL command not properly ended
Any help or tips would be greatly appreciated as I've been taking SQL for about six weeks and not very proficient!
Thanks!If you really really really want to update the entire table, the syntax would be...
UPDATE book_trans
SET
pastdue_fees = DECODE(SIGN((return_dte - due_dte)*2), -1, 0, 1, 12, Null);I took out all the single quotes. If you actually have a string column and you're storing entirely numbers in it then it should be declared as a NUMBER column and not a character (varchar2) column.
ALWAYS use the proper data type, it'll save you a ton of headaches in the future.
Also, since you're new to the forum, please read the FAQ so you learn the etiquette and what not.
http://wikis.sun.com/display/Forums/Forums+FAQ

Unable to execute an update statement using CallableStatement

Hi there,
I'm trying to run an update statement from JUnit using java.sql.CallableStatement and oracle.jbo.server.DBTransaction.
        String updateSql =
            "update footable set barcol=TO_DATE('12-SEP-09','dd-MM-yy') where bazcol = 505";
        try {
            statement =
                    applnModule.getDBTransaction().createCallableStatement(updateSql,
                                                                           2);
            int executeUpdate = statement.executeUpdate();
            AppsLogger.write(this,
                             "# records UPDATED ------------------>" + executeUpdate,
                             AppsLogger.SEVERE);
        } catch (SQLException s) {
            s.printStackTrace();
            Assert.fail("Encountered SQL Exception: " + s);
        } finally {
            try {
                if (statement != null)
                    statement.close();
            } catch (SQLException s) {
        }Below is the exception I get when I run the above code. There is no problem with the SQL - it works fine from SQLDeveloper.
java.lang.AssertionError: Encountered SQL Exception: java.sql.SQLDataException: ORA-01858: a non-numeric character was found where a numeric was expected
     org.junit.Assert.fail(Assert.java:91)
     sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
     sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
     sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
     java.lang.reflect.Method.invoke(Method.java:597)
     org.junit.internal.runners.TestMethod.invoke(TestMethod.java:66)
     org.junit.internal.runners.MethodRoadie.runTestMethod(MethodRoadie.java:105)
     org.junit.internal.runners.MethodRoadie$2.run(MethodRoadie.java:86)
     org.junit.internal.runners.MethodRoadie.runBeforesThenTestThenAfters(MethodRoadie.java:94)
     org.junit.internal.runners.MethodRoadie.runTest(MethodRoadie.java:84)
     org.junit.internal.runners.MethodRoadie.run(MethodRoadie.java:49)
     oracle.apps.common.applicationsTestFramework.junit.internal.AtfJUnit4JTestCaseClassRunner.invokeTestMethod(AtfJUnit4JTestCaseClassRunner.java:362)
     oracle.apps.common.applicationsTestFramework.junit.internal.AtfJUnit4JTestCaseClassRunner.runMethods(AtfJUnit4JTestCaseClassRunner.java:272)
     oracle.apps.common.applicationsTestFramework.junit.internal.AtfJUnit4JTestCaseClassRunner$1.run(AtfJUnit4JTestCaseClassRunner.java:265)
     org.junit.internal.runners.ClassRoadie.runUnprotected(ClassRoadie.java:34)
     org.junit.internal.runners.ClassRoadie.runProtected(ClassRoadie.java:44)
     oracle.apps.common.applicationsTestFramework.junit.internal.AtfJUnit4JTestCaseClassRunner.run(AtfJUnit4JTestCaseClassRunner.java:262)Edited by: 911023 on Oct 2, 2012 11:28 AM
Edited by: 911023 on Oct 2, 2012 11:30 AM

Using case statement.
UPDATE gor_gold_post
   SET hoov_flag = CASE WHEN TRUNC (ADD_MONTHS (rec.loyalty_date, rec.loyalty_period) - SYSDATE) < 304
                               OR
                               (TRUNC (ADD_MONTHS (rec.loyalty_date, rec.loyalty_period) - SYSDATE) IS NULL
                            AND (SYSDATE - TO_DATE (rec.contract_date, 'YYYYMMDD')) > 91.2)
                       THEN 1
                       ELSE 99
                     END,
       b49n      = CASE WHEN TRUNC (ADD_MONTHS (rec.loyalty_date, rec.loyalty_period) - SYSDATE) < 121.6
                         OR
                         (TRUNC (ADD_MONTHS (rec.loyalty_date, rec.loyalty_period) - SYSDATE) IS NULL
                            AND (SYSDATE - TO_DATE (rec.contract_date, 'YYYYMMDD')) > 91.2)
                       THEN 1
                       ELSE 99
                     END
WHERE tariff_code IN (169, 135, 136);Note: Code not tested.

Is their any limit on the number of column updates in a update statement!

Hello All,
Is their any limit on the number of columns to set in a single update statement.+
am using oracle 11g .
example :-
UPDATE FMLY SET as_comp1 = v_as_comp1 , as_comp2 = v_as_comp2, as_comp3 = v_as_comp3, as_comp4 = v_as_comp4 , as_comp5 = v_as_comp5 , perslt18 = v_perslt18 , persot64 = v_persot64 , fam_size = v_fam_size , numchild = total_children , C_AGE1 = v_c_age1, C_AGE2 = v_c_age2, C_AGE3 = v_c_age3, C_AGE4 = v_c_age4 WHERE FAMID = fmly_famid(i) ;
and also is it good practice to issue single update or multiple updates ?
example for the above update i can have multiple statements like .. does the performance matters if so which is good
UPDATE FMLY SET as_comp1 = v_as_comp1 , as_comp2 = v_as_comp2, as_comp3 = v_as_comp3, as_comp4 = v_as_comp4 , as_comp5 = v_as_comp5
WHERE FAMID = fmly_famid(i) ;
UPDATE FMLY SET perslt18 = v_perslt18 , persot64 = v_persot64 , fam_size = v_fam_size
WHERE FAMID = fmly_famid(i) ;
UPDATE FMLY SET numchild = total_children WHERE FAMID = fmly_famid(i) ;
UPDATE FMLY SET C_AGE1 = v_c_age1, C_AGE2 = v_c_age2, C_AGE3 = v_c_age3, C_AGE4 = v_c_age4 WHERE FAMID = fmly_famid(i) ;
thanks/kumar
Edited by: kumar73 on Sep 25, 2010 8:38 AM

If you can do it in a single SQL statement then you should do that.
Here's a mantra that I found to work out pretty good:
http://asktom.oracle.com/pls/apex/f?p=100:11:0::::P11_QUESTION_ID:73891904732164

Error while schedulingg update stat in db13

Dear Experts,
Please look into my issue we are facing an error while scheduling update statistics in db13 and I tried to open detailed log
It is given
SXPG_COMMAND_EXECUTE failed for BRTOOLS - Reason: program_start_error: For More Information, See SYS
Please help me how to solve this my error
Regards

Hi,
Check the owner for BRBACKUP, BRARCHIVE, and BRCONNECT in kernel,
these files should be with SIDADM, if not change the owner to SIDADM and rerun the update stats.
and also Refer the note 446172
Regards,
Ram

How do I pass multiple values from a text box to an update statement

I hope this does not sound to lame. I am trying to update multiple values Like this:
Code|| Computer Desc || Computer Price || Computer Name
SEL1 || Apple macbook || 1564 || Apple Macbook Basic
SEL2 || Dell 630 || 1470 || Dell Latitude
I want to change all six values at once in one update statement based on the Code, I can't find a good tutorial/example to help me.
Can anyone point me in the right direction?
Thanks so much,
Laura

You can do conditional updates with decode or case statements e.g.
SQL> create table t as
2 select 'SEL1' as code, 'Apple macbook' as comp_desc, 1564 as comp_price, 'Apple Maxbook Basic' as comp_name from dual union
3 select 'SEL2', 'Dell 630', 1470, 'Dell Latitude' from dual
4 /
Table created.
SQL>
SQL> update t
2 set comp_desc = CASE code WHEN 'SEL1' THEN 'Test1' Else 'Test2' END,
3      comp_price = CASE code WHEN 'SEL1' THEN 1234 Else 2345 END,
4      comp_name = CASE code WHEN 'SEL1' THEN 'Test1 Name' Else 'Test2 Name' END
5 /
2 rows updated.
SQL>
SQL> select * from t
2 /
CODE COMP_DESC     COMP_PRICE COMP_NAME
SEL1 Test1               1234 Test1 Name
SEL2 Test2               2345 Test2 Name
SQL>

Need help to write a query for Update statement with join

Hi there,
The following update statement gives me error as the given table in set statement is invalid. But its the right table .
Is the statement correct? Please help .
update (
       select distinct(vpproadside.VEHICLE_CRED_OVERRIDE.vin)
         from vpproadside.VEHICLE_CRED_OVERRIDE
         join vpproadside.vpp_vehicle
           on vpproadside.vpp_vehicle.vin = vpproadside.VEHICLE_CRED_OVERRIDE.vin
        where VPP_CARRIER_SEQ_NUMBER = 90
          and EXPIRY_DATE = '17-MAR-10'
   set vpproadside.VEHICLE_CRED_OVERRIDE.EXPIRY_DATE = '15-SEP-10';Edited by: Indhu Ram on Mar 12, 2010 1:00 PM
Edited by: Indhu Ram on Mar 12, 2010 1:22 PM
Edited by: Indhu Ram on Mar 12, 2010 2:35 PM
Edited by: Indhu Ram on Mar 15, 2010 8:04 AM
Edited by: Indhu Ram on Mar 15, 2010 8:06 AM
Edited by: Indhu Ram on Mar 15, 2010 8:28 AM

Ask Tom has very good discussion about this, if UPDATE does not work for PK issue, you can use MERGE
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:760068400346785797

Running an update statement on two dependent attributes

Dear All,
I have a repair_job table that contains values for work_cost, parts_cost and total_cost which is the sum of the work and parts cost values. I want to run an update statement that doubles the work cost and, naturally, updates the value of total cost as well. I tried to run it as:
update repair_job
set work_cost = 2 * work_cost, total_cost = work_cost + parts_cost
where licence in (
select licence from car
where year = to_char(sysdate,'YYYY')
thinking that because the update of work_cost is first on the list, the updated value of total cost would be correct. It seems however that the update of total cost happens first and then the work cost is been updated; not sure what the reason is for that and it happens no matter what the order is in the update statement.
I know that I can do it in two separate statements, or use a trigger or PL/SQL to do it but I am curious as to why it has this behaviour. Also, is there a way to do it in a single SQL statement - i.e. forcing the update of the work_cost attribute first and then that of total_cost?
I look forward to hearing from you soon.
Regards,
George

Welcome to the forum!
>
thinking that because the update of work_cost is first on the list, the updated value of total cost would be correct. It seems however that the update of total cost happens first and then the work cost is been updated; not sure what the reason is for that and it happens no matter what the order is in the update statement.
I know that I can do it in two separate statements, or use a trigger or PL/SQL to do it but I am curious as to why it has this behaviour. Also, is there a way to do it in a single SQL statement - i.e. forcing the update of the work_cost attribute first and then that of total_cost?
>
The update to all columns of the row happen at the same time - there is no order involved.
You don't need two statements but you do need to do the updates based on the current value of the columns.
set work_cost = 2 * work_cost, total_cost = 2 * work_cost + parts_cost----------
In addition to sb92075's comments in 11 g you could also just define a virtual column for total_cost and then just query it like you do now.
total_cost NUMBER GENERATED ALWAYS AS (work_cost + parts_cost) VIRTUAL,See this Oracle-base article for an example
http://www.oracle-base.com/articles/11g/virtual-columns-11gr1.php
Edited to supplement sb92075's reply by mentioning virtual columns

How can i use multiple row subquery in update statement

Hai All
I using group function in my update statement.. and i need to update more rows so i need to use multiple row
subquery pls tell me how to use multiple row subquery in update statement
For example
while i am using this like this i got an error
update dail_att set outtime in (select max(r2.ptime) from temp_att where empcode=r2.enpno and
barcode=r2.cardn and attend_date=r2.pdate group by enpno,pdate,cardn);
Pls tell me how to use with example
Thanks & regards
Srikkanth.M

Hai Man
Thanks for ur response Let me clear what i need
First step Fetch the records as text file and stores into table T1
and the next step is i have seperated the text using substring and stores in different columns of a table
There are two shifts 0815 to 1645 and 1200 and 2000
Here I rep IN and O rep OUT
Empno date time inout
001 01-01-10 0815 I
002 01-01-10 0815 I
003 01-01-10 0818 I
001 01-01-10 1100 0
001 01-01-10 1130 I
002 01-01-10 1145 0
002 01-01-10 1215 I
004 01-01-10 1200 I
005 01-01-10 1215 I
004 01-01-10 1315 O
004 01-01-10 1345 I
001 01-01-10 1645 0
002 01-01-10 1715 0
003 01-01-10 1718 0
004 01-01-10 2010 0
005 01-01-10 2015 0
This is my T1 table i have taken data from text file and stored in this table from this table i need to move data to another table T2
T2 contains like this
Empno Intime Intrin Introut Outtime Date
001 0815 1100 1130 1645 01-01-10
002 0815 1145 1215 1715 01-01-10
003 0818 1718 01-01-10
004 1200 1315 1345 2010 01-01-10
005 1215 2015 01-01-10
This what i am trying to do man but i have little bit problems Pls give some solution with good example
And my coding is
declare
     emp_code varchar2(25);
in_time varchar2(25);
out_time varchar2(25);
Cursor P1 is
Select REASON,ECODE,READMODE,EMPD,ENPNO,FILL,PDATE,PTIME,INOUT,CARDN,READERN
From temp_att
group by REASON,ECODE,READMODE,EMPD,ENPNO,FILL,PDATE,PTIME,INOUT,CARDN,READERN
ORDER BY enpno,pdate,ptime;
begin
     for r2 in p1 loop
declare
bar_code varchar2(25);
begin
select barcode into bar_code from dail_att where empcode=r2.enpno and attend_date=r2.pdate;
For r3 in (select empcode,empname,barcode,intime,intrin,introut,addin,addout,outtime,attend_date from dail_att)loop
if r2.inout ='O' then
update dail_att set outtime =(select max(r2.ptime) from temp_att where empcode=r2.enpno and barcode=r2.cardn and attend_date=r2.pdate group by r2.cardn,r2.enpno,r2.pdate );
end if;
end loop;
exception
     when no_data_found then
     if r2.inout ='I' then
               insert into dail_att(barcode,empcode,intime,attend_date)(select r2.cardn,r2.enpno,min(r2.ptime),r2.pdate from temp_att group by r2.cardn,r2.enpno,r2.pdate );
     end if;
end;
end loop;
commit;
     end;
Pls tell me what correction i need to do i the update statement i have used a subquery with group function but when i used it will return only one row but my need is to return many rows and i need to use multiple row subquery
and how can i use it in the update statement
Thanks In Advance
Srikkanth.M

How to use the updated value in the same update statement

Hello,
I just wonder how to use the updated new value of other column in the same udpate statement. I am using Oracle 11.2, and want to update the two columns with one update statement as following:
create table tb_test (id number(5), tot number(5), mon_tot number(5));
update tb_test set (tot = 15, mon_tot = tot *15) where id = 1;
...I would like to update both tot and mon_tot column, the value of mon_tot shall be determinted by the new value of tot.
Thanks,
Edited by: 939569 on 1-Feb-2013 7:00 AM

Edit: example added
SQL> create table tb_test
2 ( id number(5)
3 , tot number(5)
4 , mon_tot number generated always as (tot*15) virtual
5 );
Table created.
SQL> insert into tb_test (id, tot) values (1, 5);
1 row created.
SQL> select * from tb_test;
        ID        TOT    MON_TOT
         1          5         75
1 row selected.
SQL> update tb_test
2 set    tot = 15
3 where id = 1;
1 row updated.
SQL> select * from tb_test;
        ID        TOT    MON_TOT
         1         15        225
1 row selected.

How to track a column is not updated in a update statement issued.

Hello All,
Is there a way to write a trigger when a particular column is not specified in update statement.
For example, consider i have a table with 20 columns(Say Column1...column20). Trigger has to get fired only when column15(say) is not specified.
I know
CREATE OR REPLACE TRIGGER test_trigger
BEFORE UPDATE
OF COLUMN1, COLUMN2......COLUMN20--Except COLUMN15
ON TESTTABLE
FOR EACH ROW
BEGIN
END of_clause; /
above trigger will solve my problem. But i don't want to mention all columns in this trigger. It will cause maintainance problem afterwards.
Is there any way to mention something like NOT OF COLUMN in the trigger ?
Regards,
Abhijit.

That trigger would get fired for every column except column 15.
What do you mean by "when a particular column is not specified in update statement"? Do you mean that the column is not mentioned at all in the update statement, or that the value of that column is not being changed even if it is mentioned in the statement?
If you mean the former, then I don't think there is any way to do that. however, if you want to do something only if the value in column15 is unchanged, then something along the lines of:
CREATE TRIGGER test_trigger
   BEFORE UPDATE OF testtable
   FOR EACH ROW
BEGIN
BEGIN
   IF (:new.column15 IS NULL and :old.column15 IS NULL) OR
      (:new.column15 IS NOT NULL and :old.column15 IS NOT NULL and
       :new.column15 = :old.column15) THEN
      < do whatever for no changes >
   ELSE
      < do nothing or something else for changes >
   END IF;
END;John

ROWNUM in update statement

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