Improve this answer. Solomon Rutzky Solomon Rutzky Community Bot 1. Please be aware of the risky assumption being made when reasoning that " When the user updates the column manually it takes their update ". While that is a true statement, it ignores the fact that "their update" that is being honored is not, in any way, required to be the particular update you are wanting. Please see my answer for explanation as well as info on how to accomplish what you are wanting to do Sign up or log in Sign up using Google.
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This scenario will update the row again, but this time the statement references 2 columns. Also, both values are being set to the exact same value they already contain and won't actually change them. The important takeaway here is that even though nothing changed the trigger still executed and reported back that the columns were updated. This scenario is a common way for false positives to cause extra work in a trigger. Notice that even though 0 rows were affected the trigger still executed!
The trigger definitely executes, but any column checking returns false. These scenarios have shown that there are imperfections to both methods and can easily produce false positives. Does the trigger need to continue to execute if there were no affected rows? After that it will return the row count associated with the last statement executed within the trigger. Does a section of the trigger, or even the entire trigger, only need to run when certain columns were affected?
A trigger can only be placed on a single table so this logic will work for any number of tables by creating separate triggers for every table that needs one. It has some strange properties when the table gets wider than 8 columns.
MyTrigger ON dbo. Related Articles. Maximum stored procedure, function, trigger or view nesting level exceeded limit Prevent accidental update or delete commands of all rows in a SQL Server table. Popular Articles.
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