identify the State of a new line created in VO before committing

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  Hello

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  Hey guys,.
  
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• How to apply the constraint ONLY to new lines

  Hi, gurus:

  I have a question as follows:

  We need to migrate a legacy to a new production server system. I have to add two columns from each table to record that updates the row most recently through triggers, and I must ask constraint not null for columns. However, since the old system has already given for each table and old data have no value for 2 new columns. If we apply the constraint, all existing lines throws an exception. I wonder if there is possibility to apply the ONLY constraint to the new lines coming in the future.

  Thank you.

  Sam

  We need to migrate a legacy to a new production server system. I have to add two columns from each table to record that updates the row most recently through triggers, and I must ask constraint not null for columns.

  The best suggestion I can give you is that you ensure that the management of the documents on behalf of the person who came up with this requirement of brain hair so they can sufficiently punished for the huge waste of human and database resources they have caused for which they almost NOTHING got in return in the future.

  I've seen many systems over the past 25 years + who have added columns such as: CREATED_DATE, CREATED_BY, MODIFIED_DATE MODIFIED_BY.

  I have yet to see a system where this information is really useful for any real purpose. Many systems have the users/application schema, and users can change the data. In addition, a DBA can modify the data, and many of them can connect as long as the schema owner to do.

  Many tables also updated by other applications or processes of loading of bulk and these processes use generic connections that cannot be attached to any particular system.

  The net result is that these columns will be filled by user names that are completely useless for verification purposes.

  If a user is allowed to edit a table, they are allowed to modify a table. If you want to track that you need to implement a security strategy appropriate using the functionality of Oracle's AUDIT.

  Encumber ALL or even many of your tables with columns is a very BAD idea. Worse is the addition of doesn't trigger this server no other goal but captures the useless information, but because they are the impacts on performance just PL/SQL cause worse the total impact.

  Must certainly be to worry about security and auditability of your important data. But by adding columns and triggers, such as those proposed is NOT the right solution to achieve this security.

  Before your organization any decision so stupid you should propose that the same steps before adding this feature you should take before the addition of ANY structural MAJOR or the application:

  1. document the real need

  2 document and justify the business reasons for this need

  3. perform tests that shows the impact of this requirement on the production system

  4. determine the cost of the resources (people, storage, etc.) to implement this requirement

  5 demonstrate how this information will actually be used EFFECTIVELY for professional purposes

  With regard to points #1 and #2 above that the requirement should be noted with regard to the PROBLEM to be solved, not a some preconceived notion of the solution that should be used.

  Your org should also speak to other associations or other departments in your org even who have used your proposed solution and discover how useful it was for them. If you do this research, you may find it has not responded to their needs at all.

  And in your own org, there are probably some applications with tables that already have such columns. Has anyone here EVER used these columns and found them invaluable to identify and solve any real problems?

  If you can't use them and why first add their data to some important process?

  IMHO, this is a total waste of time and resources to add columns in your tables. Any such audit or security, at least, approach will be limited to those tables with key data that needs to be protected, and then only when you cannot implement the appropriate audit "best practices".

  A migration is hard enough without adding unnecessary additional expenses such as those. You have MUCH more important you can do with the resources that you have:

  1. capture all THE DDL for the existing system in a version control system

  2. train your developers on the use of the version control system

  3. determine the correct configuration of the new server and the system. It's almost a CERTAINTY that parameters will change and performance will suffer even if you don't think you have changed anything at all.

  4. validate that the data was migrated correctly. Which may involve a broad polling and comparison to make sure that the data has not been altered during migration. The validation process to a SINGLE TABLE is more difficult if the table structures are not the same. And they will not if you add two columns in each table; every single request, you do have to specify the columns by name in order to EXCLUDE from your two new columns.

  5. validate the performance of the app on the new system. He there will HAVE problems where things do not work as they did. You need to find these problems and fix them

  6 capture appropriate statistics after that data has been migrated and all indexes have been rebuilt.

  7 enter the new implementation plans to use a base for when things go wrong in the future.

  If it's worth doing is worth doing right.

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  Tag2007, try using the Replace function:

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  David Powers wrote:
  > Tag2007 wrote:
  > Thanks Im on the site now and don't see the version lite? Do you have
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  >
  > InterAKT was acquired by Adobe in September and most of its products
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• query to calculate the value and produce new lines

  QUARTER CUSTOMER PRODUCT RETAIL_SALES_AMT WHOLESALE_AMT
  
  01/01/2006 ABC VACUUM CLEANER 454234,00 65633456.00
  01/04/2006 ABC VACUUM CLEANER 324562,00 45333234.00
  01/07/2006 ABC VACUUM CLEANER 67845423.00 NULL
  01/10/2006 ABC VACUUM CLEANER 67453453.00 NULL
  01/01/2007 ABC VACUUM CLEANER 56754633.00 NULL
  01/04/2007 ABC VACUUM CLEANER 45423434.00 NULL
  
  
  Hi guys,.
  
  It's a situation where I have to produce a few new lines with projections based on Q4 RETAIL_SALES_AMT
  RETAIL_SALES_AMOUNT and fourth ' rs following WHOLESALE_AMT. As you can see from the sample data for a specific customer,
  product I have populated only until 01/04/2006 retail_sales_amt but WHOLE_SALE amt for the same product and customer
  are there up to 01/04/2007.
  
  I have to produce a PROJECTED RETAIL_SALES_AMT and it must be inserted in a new line with an indicator to identify
  a proposed line. Here, in this case I have to produce a new line of projection from 07/01/2006,10/01/2006 and 01/01/2007
  the RETAIL_SALES_AMT. The method of calculation is provided for in:
  
  retail_sales_amt scheduled for 07/01/2006=.345+ ((01/07/2006 whole_sales-01/04/2006 whole_sales) / (01/04/2006 whole_sale)))
  * 01/04/2006 RETAIL_SALES_AMT and move forward to subsequent quarters.
  
  Is it possible that I can use a query to produce these new lines by calculating the RETAIL_SALES_AMT on the fly, or any other
  How to procedure.
  
  Please help as it seems a little complicated.
  
  Concerning
  
  Published by: user626688 on October 27, 2009 11:26
  
  Published by: user626688 on October 27, 2009 11:26
  
  Published by: user626688 on October 27, 2009 11:27
  
  Published by: user626688 on October 27, 2009 11:28
  
  Published by: user626688 on October 27, 2009 11:31
  
  Published by: user626688 on October 27, 2009 11:32

  Hello

  As far as I can tell, that's what you asked for:

  WITH     got_prev         AS
  (
       SELECT     table_x.*
       ,     LAG (wholesale_amt) OVER ( PARTITION BY  customer
                                      ,                product
                              ORDER BY      quarter
                             )     AS prev_wholesale_amt
       FROM     table_x
  --     WHERE     ...     -- Any filtering goes here
  )
  ,     tree     AS
  (
       SELECT     got_prev.*
       ,     SYS_CONNECT_BY_PATH ( CASE
                             WHEN  LEVEL = 1
                             THEN  retail_sales_amt
                             ELSE  ( .345
                                            + wholesale_amt
                                            - prev_wholesale_amt
                                ) / prev_wholesale_amt
                            END
                          , '*'
                          )                    AS path
       FROM     got_prev
       START WITH     retail_sales_amt     IS NOT NULL
       CONNECT BY     retail_sales_amt     IS NULL
            AND     quarter               = ADD_MONTHS (PRIOR quarter, 3)
            AND     customer          = PRIOR customer
            AND     product               = PRIOR product
  )
  SELECT       quarter
  ,       customer
  ,       product
  ,       COALESCE ( retail_sales_amt
               , eval_number ( LTRIM ( path
                                         , '*'
                             )       )
               )      AS retail_sales_amt
  ,       wholesale_amt
  ,       NVL2 ( retail_sales_amt
              , 'F'
              , 'T'
              )          AS projected_flag
  FROM       tree
  ORDER BY  customer
  ,            product
  ,       quarter
  ;
  

  I posted earlier the eval_number function.

  In this query, a group of consecutive quarters, where the first group a retail_sales_num and the rest of the members of the group are not, is treated as a hierarchy. The retail_sales_amt of all members (except the first) will be based on the previous, as well as the wholesale_amts past and present.
  Say that a tree is 5 points of time (as in your examples of data). We can calculate the 2nd point in several ways: using analytical functions, for example. But we cannot use the same formula to calculate the 3rd point, because the calculation of section 2 must be completed before we can calculate the 3rd. It goes the same for the 4th and 5th.
  This is CONNECT BY arrives. CONNECT BY is one thing in Oracle SQL that can be recursively; children may find themselves once their parents are found, in the same way we want to calculate the nth retail_sales_amt once the amount of the n-minus-1 has been calculated. To do this, we use SYS_CONNECT_BY_PATH, where the first element in the path is the retail_sales_amt given, and all others are the factor to multiply this number to get the next amount.
  SYS_CONNECT_BY_PATH produces a string like ' * 324562 *. 4965935 *-. 0057739', which should be interpreted as a number. TO_NUMBER won't: TO_NUMBER cannot convert only a single numeric literal. Instead, we have a function defined by the user who put this string dynamically in the SELECT clause of a query, where it is interpreted as a numeric expression.

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  Kind regards
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  Denes Kubicek
  -------------------------------------------------------------------
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  http://www.Opal-consulting.de/training
  http://Apex.Oracle.com/pls/OTN/f?p=31517:1
  -------------------------------------------------------------------

• Added new line at the top of tabular form in APEX 5.0 and universal theme (topic 42)

  Hello Apex Experts,

  When the user clicks on the button 'Add Row' a tabular presentation, I would like the new line to be at the top of the report rather than the bottom.

  
  

  I followed the instructions from Added new line at the top of table in APEX 4.0 form and Denes Kubicek demo application. But it does nothing, always create new bottom line.

  
  

  Anyone have an idea or an idea?

  
  

  Your help would be appreciated.

  
  

  Kind regards

  Blabla
  

  Hi all

  This problem is now solved by following the new blogpost of Dene:

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  Kind regards

  Blabla