Question

I’d like to call Update … Set … Where … to update a field as soon as that evil ERP process is changing the value of another.

I’m running MS SQL.

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Answer 1

I can’t test, but i guess its a trigger like this

 CREATE TRIGGER TriggerName ON TableName FOR UPDATE AS   IF UPDATE(ColumnUpdatedByERP)   BEGIN     UPDATE ...   END 

— Edit – a better version, thanks for comment Tomalak

  CREATE TRIGGER TriggerName ON TableName FOR UPDATE AS   DECLARE @oldValue VARCHAR(100)   DECLARE @newValue VARCHAR(100)   IF UPDATE(ColumnUpdatedByERP)   BEGIN     SELECT @oldValue = (SELECT ColumnUpdatedByERP FROM Deleted)      SELECT @newValue = (SELECT ColumnUpdatedByERP FROM Inserted)      IF @oldValue <> @newValue     BEGIN       UPDATE ...     END   END