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Secondly you have shown me to update table with "KEY PRESERVED" method. IT NEEDS THIS LOGICALLY regardless of the method used, so just add it (for if a row in OLD joins to more than one row in NEW -- you are hosed, you cannot update this data, therefore NEW has a unique/primary key, add it to facilitate the update) I had a similiar query and i tried applying to my tables.
If it is not possible can you show me how to write "GOOD" sql ? i.e, one column of a table should get updated from another column of another table.
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We are going to update column DESCRIPTION and PICTURE in table Categories_Test by using data in table Categories, based on data in the common column CATEGORY_ID. Update data in a column in table A based on a common column in table B. Update data in two columns in table A based on a common column in table B. Conditionally update data in table A based on a common column in table B. No portion may be reproduced without my written permission.
I just found out that Example Conglomerate acquired Osric Publishing’s Oracle consulting business, and so I need to update my contacts database so that all of the Oracle consultants who had @e-mail addresses now have @e-mail addresses.Excepted from this license are code snippets that are explicitely marked as citations from another source.The MIT License (MIT) Copyright (c) 2015-2015 makandra Gmb H Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions: The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. I want to write SQL ( not PL/SQL ) to update transaction table from mapping table at one stroke. regards & thanks pjp update ( select old.old_account_number, new.new_account_number from old_table old, mapping_table new where old.old_account_number = new.new_account_number ) set old_account_number = new_account_number; disabling foreign keys during the operation and enabling them afterward. update ( select old.old_account_number, new.new_account_number from old_table old, mapping_table new where old.old_account_number = new.old_account_number ) set old_account_number = new_account_number; (ie in the subquery, match the old account numbers not try matching the old in the old table to the new in the mapping table) Of course if the original posting had the CREATEs/INSERTS etc, it would have a quick and east test. I have to update a transaction table where mapping is existing with old account no and new account number.