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With proper documentation and proper review processes, we all could probably deal with the maintenance issues.

lname”; otherwise, this update would never have been attempted (because it does not set the NAME attribute to that function result! Apparently they were trying really hard to set it to some other value (but they could not do so without first disabling the trigger). Triggers are hidden in the data definition language (DDL) and in the schema.The NAME attribute is the result of a trivial function, the function is not computationally expensive, and they could have indexed the function if necessary.There was no reason to ever store the result of the function in the table.Now, whenever possible, I will go very far out of my way to avoid a trigger.I have two primary reasons for avoiding triggers: Maintenance Headache Hopefully the first reason to avoid triggers, the maintenance headache, is fairly easy to see.Well, SMTP (Simple Mail Transfer Protocol) won’t participate in a distributed transaction with Oracle Database, so the sending of the e-mail will not roll back.You’ll have 100 e-mails sent that describe 100 new orders that never really happened .

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  1. Oracle® 非公式 SQL. CREATE OR REPLACE TRIGGER trigger_name. END IF; IF UPDATING THEN -- UPDATE 時 OLD NEW.

  2. This Oracle tutorial explains how to create an AFTER UPDATE Trigger in Oracle with syntax and examples. An AFTER UPDATE Trigger means that Oracle will fire this.

  3. Create or replace TRIGGER MonTrigger BEFORE INSERT OR DELETE OR UPDATE ON maTable FOR EACH ROW BEGIN IF INSERTING OR UPDATING THEN IF.

  4. Update query in after insert trigger;. a post-event trigger will fire updating the D field to. It is working but while inserting if we modify any data then.

  5. Trigger Enhancements in Oracle Database 11g Release 1. The Oracle 11g trigger syntax now includes the FOLLOWS clause to. INSERT'; WHEN UPDATING THEN.

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