Oracle trigger updating predicate multiple columns sex dating in brooklyn kentucky
A trigger stored in the database can include SQL and PL/SQL or Java statements to run as a unit and can invoke stored procedures.
However, procedures and triggers differ in the way that they are invoked.
A constraint can apply either to new data only (like a trigger) or to both new and existing data.
Specifically: How Triggers and Constraints Differ Both triggers and constraints can constrain data input, but they differ significantly. For example, a trigger can prevent a DML statement from inserting a values that were inserted into the column before the trigger was defined or while the trigger was disabled.
Unlike a subprogram, a trigger cannot be invoked directly.
A trigger is invoked only by its triggering event, which can be caused by any user or application.
Hi Tom, Due to migration to new system we have to change all our account numbers. June 28, 2005 - pm UTC yes, the predicate in the join for the fictional question without a sample table and data was wrong (everytime I wing it, try to answer WITHOUT TESTING, it comes out wrong. test cases are relevant :) Hi Tom, Thanks for answering my question.
( Client number is consist of branch, Number, Sub Number Currency Code ) We have one big transaction table around 1 million records, having many columns, and at many places client numbers are stored from account master under various columns 1. You told me to use 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; But I think my questions still reamin unanswered 1. In your answer only one number say client number will get updated.