update of column based on the values of the same table

Similar Questions

• Compare multiple columns and update a column based on the comparison

  Hi all

  I have to update the column STATUS of the slot structure of the table.

  Status should be 'P' if all the columns count are equal on the other should be "F".

  The value of the column can be "NA'. If the value is NA, then avoid this comparison column; compare only other 3 columns.

  My output should look like below.

  State of cnt1, cnt2 cnt3 ID cnt4

  1   4       4       4     4       P

  2   4       5       4     4       F

  3 4 4 NA 4 P

  NA 4 4 3 4

  I tried with the statemnt with BOX WHEN conditions and DECODE UPDATE, but could not succeed, can someone please help

  To do this, if you use my statement in response #11 box (Re: Re: comparison of multi-column and update a column based on the comparison of)

• In the form of table-update a column based on the other

  Greetings,
  
  I want to update a column based on the value of another column in a tabular presentation. What should I use? Calculation or validation process?
  
  -Vatsa

  Yes, get rid of the update of "pims_component" - this is the cause of the error table mutation - and simply set

  : new.state_ind: = Ls_state;

  CITY

• Update of several rows of the same table using trigger

  Hello

  I have the following table

  ---------------------------------------------------------------------------------------------------------

  CREATE TABLE ATT_PERMISSIONS
  (
  DATE OF PRMONTHYR,
  EMPID	NUMBER (10)	DEFAULT VALUE 0	,
  FROMDATETIME	DATE		,
  TODMTFDATETIME	DATE		,
  NUMBER OF PERMMINS (3),

  SSLINASTRETCH NUMBER (3).

  PERMATTINELIGIBLE	NUMBER (1)	DEFAULT VALUE 0
  );

  ------------------------------------------------------------------------------------------------------

  I want to update the column PERMATTINELIGIBLE in the same table when each line is inserted.

  I created following trigger for that

  CREATE OR REPLACE TRIGGER SSL_AFTER_UPDATE AFTER UPDATE ON ATT_PERMISSIONS

  FOR EACH LINE

  BEGIN

  Update ATT_PERMISSIONS set PERMATTINELIGIBLE =

  (

  SELECT THE CHECK BOX

  WHEN PERMMINS < = 60

  or

  (

  PERMMINS < = SSLINASTRETCH

  AND

  COUNT (CASE WHEN PERMMINS = 0 THEN NULL OTHERWISE 1 END)

  COURSES (PARTITION BY empid, prmonthyr) < = 1

  )

  THEN 1

  0 OTHERWISE

  END

  FROM ATT_PERMISSIONS where prmonthyr =:new.prmonthyr, empid =:new.empid

  ) where prmonthyr =:new.prmonthyr, empid =:new.empid;

  END;

  ---------------------------------------------------------------------------------------------------

  That is to say.

  When a row is inserted the PERMATTINELIGIBLE of all records for this employee for the month is recalculated.

  There would be only two or three records for an employee for a month.

  PERMMINS is the number of minutes to use as short leave.

  If it is less than 60 is eligible for the bonus to attendance for this employee.

  If this isn't normally the date is not eligible for the attendance for this employee premium.

  but an exception is that if a short leaves of DISP employee allowed a month (IE. ( SSLINASTRETCH ) in a straight line, IE. one day, that day is eligible for the bonus of presence.

  That is to say. Why the number of short leaves in a month is taken. If it's one and done minutes use is lower to SSLINASTRETCH, then the day is eligible for the attendance bonus.

  But when I try to create the trigger I get error, PL/SQL: ORA-00907: missing a right parenthesis.

  Help, please

  I use oracle 10g

  I want to update the column PERMATTINELIGIBLE in the same table, when each row is inserted.

  No - you do NOT want to do in a trigger.

  You cannot query the same table that the trigger is activated on. -C' is a MUTANT and you will get an exception.

  When a row is inserted is recalculated to the PERMATTINELIGIBLE of all the records for that employee for that month.

  There would be only two or three records for an employee for a month.

  PERMMINS is the number of minutes to use as short leave.

  If it is less than 60 is eligible for the bonus to attendance for this employee.

  If is not normally the day is not eligible for the premium of attendance for this employee.

  but an exception is that if a short leaves of DISP employee allowed a month (IE. SSLINASTRETCH) in a straight line, IE. one day, that day is eligible for the bonus of presence.

  That is to say. Why the number of short leaves in a month is taken. If it's one and done minutes use is less than SSLINASTRETCH, then the day is eligible for the bonus of presence.

  But when I try to create the trigger I get error, PL/SQL: ORA-00907: missing a right parenthesis.

  You can not do in a trigger. Even if correct you this error of syntax, you will get the exception that I mentioned above.

  Oracle is a multi-user system. Other users can modify the same table that you use.

  So even if you could try to interview "all the records for this employee" some of them may be locked if other users access them. Also, an insert statement could try to insert two rows for an employee and the trigger could not have seen the other lines still.

  If you want to work with data SETS (all records for an employee), you must write the PL/SQL code that LOCKS all lines updated to prevent others to interfere.

  Then you make your operations but NOT in a trigger. Perform inserts and then use an UPDATE query to set this value.

  Then VALIDATE to unlock the lines.

• update of column based on the sum of the data from another table

  I have two tables:

  Table1 (col1, col2, col3, col4, val1, status) Table2 (col1, col2, col3, col4, val2)

  For Table1 and Table2, column (col1, col2, col3, col4) are the primary key of composit.

  Table2 could have duplicated lines, that's why I want to group by (col1, col2, col3, col4) and sum (val2)

  After that, I want to update Table1.val1 with the value of sum (Table1.val2) where Table1.col1 = Table2.col1 and Table1.col2 = Table2.col2 and Table1.col3 = Table2.col3 and Table1.col4 = Table2.col4 and status = 'V '.

  I did something like this:

  UPDATE Table1 SET val1 = (

     

  WHERE Table1.col1 = t_sommevbrute.col1 and Table1.col2 = t_sommevbrute.col2 and Table1.col3 = t_sommevbrute.col3 and Table1.col4 = t_sommevbrute.col4)

  Could someone help me please? Thank you

  merge into table1 t1

  using (select col1, col2, col3, col4, sum (val2) val2

  from table2

  Group

  by col1, col2, col3, col4) t2

  on (t1.col1 = t2.col1 t1.col2 = t2.col2 and t1.col3 = t2.col3 and t1.col4 = t2.col4 and)

  When matched then

  update set t1.val1 = t2.val2;

• Fill two empty columns with the values in a column (all in the same table)

  Can someone point me in the right direction? I want to fill the column prefix and suffix with the AcctNum data.
  
  "Prefix is the part of the number before the '-' and the suffix is everything after the '-'. '. Write a SQL command to fill the column prefix and suffix.
  

  *Accounts* 
  
  AcctNum   Prefix   Suffix
  -------   ------   -------
  123-0097
  X089-056
  123-0097
  123-0098
  F3377-D
  X089-057
  X089-058
  3-009712

  It is supposed to look like this:

  *Accounts* 
  
  AcctNum   Prefix   Suffix
  -------   ------   -------
  123-0097    123     0097
  X089-056
  123-0097
  123-0098
  F3377-D
  X089-057
  X089-058
  3-009712

  That's what I came with, but it does not work because it is basically putting multiple values into a single cell:

  update accounts
       set prefix=(select substr(acctnum, 1, instr(acctnum,'-')-1) from accounts),
       suffix=(select substr(acctnum, instr(acctnum, '-')+1) from accounts)
       where acctnum=(select prefix||'-'||suffix from accounts);

  I want this query is incredibly easy and I have forget something. Any help is greatly appreciated.
  
  Published by: 885913 on September 18, 2011 12:53

  UPDATE accounts a
  SET    ( prefix, suffix ) = (SELECT Substr(acctnum, 1, Instr(acctnum, '-') - 1),
                                      Substr(acctnum, Instr(acctnum, '-') + 1)
                               FROM   accounts b
                               WHERE  a.acctnum = b.acctnum);
  

• update of column with another column with in the same table

  Hello
  We are using oracle 10g,
  I have a table with two columns i a s number one other data type is varchar2, varchar2 column contains
  numAriques and data type character I want to move only numAriques to the numeric data type field data, please kindly give answer
  
  Thanks and greetings
  tmadugula

  You are not providing any version of the database, sample data or table desc, but anyway:

  http://asktom.Oracle.com/pls/asktom/f?p=100:11:0:P11_QUESTION_ID:3083286970877 #49518312679214

  Something like:

  create or replace function is_num
  (p_str in varchar2)
  return number
  as
  begin
    return to_number(p_str);
  exception
    when others then return null;
  end;
  

  Which translates into:

  MHO%xe> select * from bla;
  
  MY_VA  MY_NUMBER
  ----- ----------
  AAAAA
  BBBBB
  11111
  22222
  CCCCC
  33333
  
  6 rijen zijn geselecteerd.
  
  Verstreken: 00:00:01.32
  MHO%xe> desc bla
   Naam                                      Null?    Type
   ----------------------------------------- -------- ----------------------------
   MY_VARCHAR                                         VARCHAR2(5)
   MY_NUMBER                                          NUMBER(5)
  
  MHO%xe> select * from bla where is_num(my_varchar) is not null;
  
  MY_VA  MY_NUMBER
  ----- ----------
  11111
  22222
  33333
  
  Verstreken: 00:00:01.73
  MHO%xe> update bla
    2  set my_number  = is_num(my_varchar)
    3  where is_num(my_varchar) is not null;
  
  3 rijen zijn bijgewerkt.
  
  Verstreken: 00:00:00.51
  MHO%xe> select * from bla;
  
  MY_VA  MY_NUMBER
  ----- ----------
  AAAAA
  BBBBB
  11111      11111
  22222      22222
  CCCCC
  33333      33333
  
  6 rijen zijn geselecteerd.
  

• Based on the same table query problem

  Hello my dear,
  
  
  I'm trying to choose a column name TD_BM_ID from a table where the base on another column named TD_TRANSFER_NO, value (TD_TRANSFER_NO) maximum and should be a group of column TD_RD_ID.
  
  Something like that...
  

  SELECT TD_RD_ID,TD_TO_BM_ID
                FROM TRANSFER_DTL 
                HAVING MAX(TD_TRANSFER_NO) = maxium value of own
                GROUP BY TD_RD_ID                                

  The data is stored in this way...

   EXAMPLE :
   TD_TRANSFER_NO      TD_RD_ID       TD_TO_BM_ID 
        1                 8               4
        2                 8               2
  
  i want TD_TO_BM_ID=2

  Help please...
  
  Kind regards
  
  Published by: HamidHelal on December 4, 2011 21:29

  HamidHelal wrote:

  I need a little more. :)

  UPDATE  STORE_ITEM_LEDGER A
     SET  SIL_BM_ID = (
                       SELECT  MAX(TD_TO_BM_ID) KEEP(DENSE_RANK LAST ORDER BY TD_TRANSFER_NO)
                         FROM  TRANSFER_DTL B
                         WHERE B.TD_RD_ID = A.SIL_ROLLBACK_ID
                      )
    WHERE SIL_ROLLBACK_ID IN (
                              SELECT  TD_RD_ID
                                FROM  TRANSFER_DTL
                             )
  /
  

  SY.

• Updated with the values in the same table, for other records corresponding to conditions

  Hi Experts,

  Sorry do not provide the structure of the table (it is a simple structure)

  I have a requirement where I need to update the columns of a table based on the same table with some match empid and date values. If the date and empid match so I have these values to any other folder and update of one who is not having details of Office . I need the Update query

  Before the update my array of values is as below

  Sort_num Emp_id Bureau start_date

  1 101 AUS 01/01/2013
  2 101 01/01/2013
  3 101 15/01/2013
  4 103 USA 01/05/2013
  5 103 01/01/2013
  6 103 05/01/2013
  7 104 FRA 01/10/2013
  8 104 10/01/2013
  9 104 01/01/2013

  After update my table should be as below

  Sort_num Emp_id Bureau start_date

  1 101 AUS 01/01/2013
  2 101 AUS 01/01/2013
  3 101 15/01/2013
  4 103 USA 01/05/2013
  5 103 01/01/2013
  6 103 USA 01/05/2013
  7 104 FRA 01/10/2013
  8 104 FRA 01/10/2013
  9 104 01/01/2013

  Thanks in advance

  I don't have the time to create the table with the data, but basically, you should be able to code the following text

  update one table

  Office set = (select desktop in table b where b.emp_id = a.emp_id)

  and b.start_date = a.start_date

  and b.office is not null

  )

  where is ([as well as overall query])

  and a.office is null

  In my opinion, who will do the trick.

  HTH - Mark D Powell.

• UPDATE on the same table in the sub query

  DB version: 11.2
  
  We have a table called SHP_GC_TRACK, which has about 8 million records with partitions. In the below UPDATE, it updates a column based on the SELECT on the same table in a subquery.
  

  UPDATE shp_gc_track a
     SET f_tran_proc  = 'Y'
   WHERE last_update_date <
            (SELECT MAX (last_update_date)
               FROM shp_gc_track b
              WHERE a.shp_trx_rowid = b.shp_trx_rowid
                AND a.c_shp_inst = b.c_shp_inst
                AND a.f_tran_proc  = b.f_tran_proc 
                AND b.f_ltr_received = 'D'
                AND f_rec_code IN ('G', 'W')
                AND b.f_rec_status = 'B'
                AND b.c_shp_inst = :b1
                )
     AND a.c_shp_inst = :b1
     AND a.f_ltr_received = 'D'             -----------------> part of composite index
     AND a.f_tran_proc  = 'N'              -----------------> part of composite index
     AND a.f_rec_code IN ('G', 'W')      --------------> part of composite index  
     AND a.f_rec_status = 'B';              -----------------> part of composite index  

  This UPDATE takes a long time to run and sometimes get hung up.
  
  We have a composite index on four columns f_ltr_received, f_rec_code, f_rec_status and f_tran_proc. Explain the plan shows that this composite index is used.
  
  
  
  Any way to rewrite this query or suggestion?

  Steve_74 wrote:
  DB version: 11.2

  We have a table called SHP_GC_TRACK, which has about 8 million records with partitions. In the below UPDATE, it updates a column based on the SELECT on the same table in a subquery.

  UPDATE shp_gc_track a
  SET f_tran_proc  = 'Y'
  WHERE last_update_date <
  (SELECT MAX (last_update_date)
  FROM shp_gc_track b
  WHERE a.shp_trx_rowid = b.shp_trx_rowid
  AND a.c_shp_inst = b.c_shp_inst
  AND a.f_tran_proc  = b.f_tran_proc
  AND b.f_ltr_received = 'D'
  AND f_rec_code IN ('G', 'W')
  AND b.f_rec_status = 'B'
  AND b.c_shp_inst = :b1
  )
  AND a.c_shp_inst = :b1
  AND a.f_ltr_received = 'D'             -----------------> part of composite index
  AND a.f_tran_proc  = 'N'              -----------------> part of composite index
  AND a.f_rec_code IN ('G', 'W')      --------------> part of composite index
  AND a.f_rec_status = 'B';              -----------------> part of composite index  
  

  This UPDATE takes a long time to run and sometimes get hung up.

  We have a composite index on four columns f_ltr_received, f_rec_code, f_rec_status and f_tran_proc. Explain the plan shows that this composite index is used.

  Any way to rewrite this query or suggestion?

  Setting updates with subqueries may be difficult: (.) Unfortunately my suggestions below are of the try-it-and-see-what-happens variety - nothing of certain

  First of all, check the index. Is it bitmap or tree? If the tree to see if the more restrictive columns are listed first - this can help with effectiveness of b-tree indexes. Also if the tree a composite bitmap for columns with lots of repeat values instead could help

  Its a correlated subquery so that you cannot run just the subquery first put the result in a scalar varaiable and using the variable in the SQL instead. You can try putting the keys w/join subuqery results in a TWG first to use TWG in SQL to see if I/O is reduced together during these two operations.

  You have the license for the parallel query option? Using parallel DML (this must be activated manually) can help. Check the documentation of the ALTER SESSION command to do so. In addition, the PARALLEL_INDEX() indicator could help

  Display the SQL execution plan

• place a select query calculation in a different column in the same table

  How can I put my calculation result in a column named within the same table?

  I have a table called: dgpercentagedatachart

  I use the columns of this dgpercentagedatachart: totalcecrating divided by lowestfeederrating times 100 to get the percentage

  In the query, I gave the result the Alias of the cal

  What I want is to put this result in my application or my calculation (in percentage) in my column "percent" on my table of dgpercentagedatachart vacuum.

  How can I configure this syntax?

  This is the select query, I came with:

  Select dgpercentagedatachart.totalcecrating, dgpercentagedatachart.lowestfeederrating,.

  100.00*dgpercentagedatachart.totalcecrating/dgpercentagedatachart.lowestfeederrating as cal

  of dgpercentagedatachart;

  Here are the results:

  CAL lowestfeederrating Totalcecrating

  8,978 7.48166666666666666666666666666666666667 120

  30.951 25.7925 120

  5.04                         120                          4.2

  Hello

  2685870 wrote:

  How can I put my calculation result in a column named within the same table?

  I have a table called: dgpercentagedatachart

  I use the columns of this dgpercentagedatachart: totalcecrating divided by lowestfeederrating times 100 to get the percentage

  In the query, I gave the result the Alias of the cal

  What I want is to put this result in my application or my calculation (in percentage) in my empty column '%' on my table of dgpercentagedatachart .

  How can I configure this syntax?

  This is the select query, I came with:

  Select dgpercentagedatachart.totalcecrating, dgpercentagedatachart.lowestfeederrating,.

  100.00*dgpercentagedatachart.totalcecrating/dgpercentagedatachart.lowestfeederrating as cal

  of dgpercentagedatachart;

  Here are the results:

  CAL lowestfeederrating Totalcecrating

  8,978 7.48166666666666666666666666666666666667 120

  30.951 25.7925 120

  5.04                         120                          4.2

  To change an existing column in a table, you can use the UPDATE or MERGE, instructions like this:

  UPDATE dgpercentagedatachart

  Percentage of VALUE = 100,00 * totalcecrating

  / lowestfeederrating

  ;

  Noramlly, tables is not redundant columns like this.  If percent can always be calculated from other columns, then it is probably better to calculate at run time and store it in the database, where you will have to be updated each time the columns it depends on change.  You can use a view to avoid having to encode them the calculation.

  If you really don't want a column that can be calculated in the same lines other columns, then use a virtual column (if you use Oracle 11 or higher).

  I hope that answers your question.

  If this isn't the case, please post a small example of data (CREATE TABLE and only relevant columns, INSERT statements) for all of the tables involved and also publish outcomes from these data.

  If you ask on a DML statement, such as UPDATE, the sample data will be the content of the or the tables before the DML, and the results will be the State of the or the tables changed when it's all over.

  Explain, using specific examples, how you get these results from these data.

  Always say what version of Oracle you are using (for example, 11.2.0.2.0).

  See the FAQ forum: Re: 2. How can I ask a question on the forums?

• How to update columns with the value of other lines in the same table

  Hello
  
  I use Oracle 11.2, I'd use SQL statements to update a column based on values in other rows in the same table. Here are the details:
  
  create table TB_test (number 4 myId, crtTs date, date of MDPU);
  
  insert into tb_test (1, to_date ('20110101', 'YYYYMMDD'), null);
  insert into tb_test (1, to_date ('20110201', 'YYYYMMDD'), null);
  insert into tb_test (1, to_date ('20110301', 'YYYYMMDD'), null);
  insert into tb_test (2, to_date ('20110901', 'YYYYMMDD'), null);
  insert into tb_test (2, to_date ('20110902', 'YYYYMMDD'), null);
  
  After you run the SQL code, I would like to have the following result:
  
  1, 20110101, 20110201
  1, 20110201, 20110301
  1, 20110301, null
  2, 20110901, 20110902
  2, 20110902, null
  
  Thanks for your suggestion.

  I guess you need this, otherwise please explain logic correctly:

  SQL> merge into tb_test t
    2  using (
    3    select rowid as rid
    4         , lead(crtts) over(partition by myid order by crtts) as updts
    5    from tb_test
    6  ) v
    7  on (t.rowid = v.rid)
    8  when matched then update
    9   set t.updts = v.updts
   10  ;
  
  5 rows merged.
  
  SQL> select * from tb_test order by 1,2;
  
        MYID CRTTS     UPDTS
  ---------- --------- ---------
           1 01-JAN-11 01-FEB-11
           1 01-FEB-11 01-MAR-11
           1 01-MAR-11
           2 01-SEP-11 02-SEP-11
           2 02-SEP-11
  

• update to column values (false) in a copy of the same table with the correct values

  Database is 10gr 2 - had a situation last night where someone changed inadvertently values of column on a couple of hundred thousand records with an incorrect value first thing in the morning and never let me know later in the day. My undo retention was not large enough to create a copy of the table as it was 7 hours comes back with a "insert in table_2 select * from table_1 to timestamp...» "query, so I restored the backup previous nights to another machine and it picked up at 07:00 (just before the hour, he made the change), created a dblink since the production database and created a copy of the table of the restored database.
  
  My first thought was to simply update the table of production with the correct values of the correct copy, using something like this:
  
  
  Update mnt.workorders
  Set approvalstat = (select b.approvalstat
  mnt.workorders a, mnt.workorders_copy b
  where a.workordersoi = b.workordersoi)
  where exists (select *)
  mnt.workorders a, mnt.workorders_copy b
  where a.workordersoi = b.workordersoi)
  
  It wasn't the exact syntax, but you get the idea, I wanted to put the incorrect values in x columns in the tables of production with the correct values of the copy of the table of the restored backup. Anyway, it was (or seem to) works, but I look at the process through OEM it was estimated 100 + hours with full table scans, so I killed him. I found myself just inserting (copy) the lines added to the production since the table copy by doing a select statement of the production table where < col_with_datestamp > is > = 07:00, truncate the table of production, then re insert the rows from now to correct the copy.
  
  Do a post-mortem today, I replay the scenario on the copy that I restored, trying to figure out a cleaner, a quicker way to do it, if the need arise again. I went and randomly changed some values in a column number (called "comappstat") in a copy of the table of production, and then thought that I would try the following resets the values of the correct table:
  
  Update (select a.comappstat, b.comappstat
  mnt.workorders a, mnt.workorders_copy b
  where a.workordersoi = b.workordersoi - this is a PK column
  and a.comappstat! = b.comappstat)
  Set b.comappstat = a.comappstat
  
  Although I thought that the syntax is correct, I get an "ORA-00904: 'A'. '. ' COMAPPSTAT': invalid identifier ' to run this, I was trying to guess where the syntax was wrong here, then thought that perhaps having the subquery returns a single line would be cleaner and faster anyway, so I gave up on that and instead tried this:
  
  Update mnt.workorders_copy
  Set comappstat = (select distinct)
  a.comappstat
  mnt.workorders a, mnt.workorders_copy b
  where a.workordersoi = b.workordersoi
  and a.comappstat! = b.comappstat)
  where a.comappstat! = b.comappstat
  and a.workordersoi = b.workordersoi
  
  The subquery executed on its own returns a single value 9, which is the correct value of the column in the table of the prod, and I want to replace the incorrect a '12' (I've updated the copy to change the value of the column comappstat to 12 everywhere where it was 9) However when I run the query again I get this error :
  
  ERROR on line 8:
  ORA-00904: "B". "" WORKORDERSOI ": invalid identifier
  
  First of all, I don't see why the update statement does not work (it's probably obvious, but I'm not)
  
  Secondly, it is the best approach for updating a column (or columns) that are incorrect, with the columns in the same table which are correct, or is there a better way?
  
  I would sooner update the table rather than delete or truncate then re insert, as it was a trigger for insert/update I had to disable it on the notice re and truncate the table unusable a demand so I was re insert.
  
  Thank you

  Hello

  First of all, after post 79, you need to know how to format your code.

  Your last request reads as follows:

  UPDATE
    mnt.workorders_copy
  SET
    comappstat =
    (
      SELECT DISTINCT
        a.comappstat
      FROM
        mnt.workorders a
      , mnt.workorders_copy b
      WHERE
        a.workordersoi    = b.workordersoi
        AND a.comappstat != b.comappstat
    )
  WHERE
    a.comappstat      != b.comappstat
    AND a.workordersoi = b.workordersoi
  

  This will not work for several reasons:
  The sub query allows you to define a and b and outside the breakets you can't refer to a or b.
  There is no link between the mnt.workorders_copy and the the update and the request of void.

  If you do this you should have something like this:

  UPDATE
    mnt.workorders     A      -- THIS IS THE TABLE YOU WANT TO UPDATE
  SET
    A.comappstat =
    (
      SELECT
        B.comappstat
      FROM
        mnt.workorders_copy B   -- THIS IS THE TABLE WITH THE CORRECT (OLD) VALUES
      WHERE
        a.workordersoi    = b.workordersoi      -- THIS MUST BE THE KEY
        AND a.comappstat != b.comappstat
    )
  WHERE
    EXISTS
    (
      SELECT
        B.comappstat
      FROM
        mnt.workorders_copy B
      WHERE
        a.workordersoi    = b.workordersoi      -- THIS MUST BE THE KEY
        AND a.comappstat != b.comappstat
    )
  

  Speed is not so good that you run the query to sub for each row in mnt.workorders
  Note it is condition in where. You need other wise, you will update the unchanged to null values.

  I wouold do it like this:

  UPDATE
    (
      SELECT
        A.workordersoi
        ,A.comappstat
        ,B.comappstat           comappstat_OLD
  
      FROM
        mnt.workorders        A      -- THIS IS THE TABLE YOU WANT TO UPDATE
        ,mnt.workorders_copy  B      -- THIS IS THE TABLE WITH THE CORRECT (OLD) VALUES
  
      WHERE
        a.workordersoi    = b.workordersoi      -- THIS MUST BE THE KEY
        AND a.comappstat != b.comappstat
    ) C
  
  SET
    C.comappstat = comappstat_OLD
  ;
  

  This way you can test the subquery first and know exectly what will be updated.
  This was not a sub query that is executed for each line preformance should be better.

  Kind regards

  Peter

• Make a column based on another value of the column in the same table

  JDev 11.1.1.6.0

  It may be a silly question but I'm stuck

  I need to conditionally return a column that said Condition is as if the value in the other column of the same table B is equal to F. I should make A column only when this condition is met. I tried the following code:

  	< af:column sortProperty = "PhoneNumber1."
  	sortable = "false".
  	headerText = "#{bindings." A.hints.PhoneNumber1.label}.
  	ID = "c146.
  	rendering = "#{rank." PhoneNumber1ResponseFlag eq 'F'} ">"
  	< af:outputText value = "#{rank." PhoneNumber1}.
  	ID = "ot130" / >
  	< / af:column >
  	< af:column sortProperty = "PhoneNumber1ResponseFlag."
  	sortable = "false".
  	headerText = "#{bindings." B.hints.PhoneNumber1ResponseFlag.label}.
  	ID = "c80" rendered = "true" >
  	< af:outputText value = "#{rank." PhoneNumber1ResponseFlag}.
  	ID = "ot129" / >
  	< / af:column >

  The data presented in the table for the PhoneNumber1ResponseFlag column are F. Still my condition does not work.

  Well, I've finally sorted it myself by managed bean.

  Here are the steps I followed:

  1. Wrote a new bean managed.
  2. Added a Boolean variable called flag and made to true when the "'PhoneNumber1ResponseFlag ' current line attribute is equal to F."
  3. Changing the property made column on this indicator.

• update of column based on another column

  Hi all
  
  I want to update the column 2 of the table based on the value of update in column 1 and the existing value in column 1
  
  Assume that table1 has columns ID, col1 and col2
  
  I update col2 based on the update to col1 value and comparing the existing value of col1 in the table.
  
  trying to decode, I think it should work.
  
  Thank you.

  Not like that.

  You change a column of type CHAR, VARCHAR2 column, right? Thus, the data will be same. (Completed with space). For the new data inserted into a column VARCHAR2 TRIM is not necessary.