SQL Server 2016: How to handle ‘The INSERT scenarios because the trigger fired’ scenarios with cascading triggers?
I tried several approaches but none seem to work... I've looked through the documentation and I'm still confused about I'm dealing with a SQL Server 2016 database where I have two tables, `Orders` and `OrderDetails`, that use cascading triggers to update a summary table, `OrderSummary`, upon any insert or update. However, I'm working with the behavior message: `The INSERT fails because the trigger fired and the statement is aborted.` This occurs when I try to insert a new order into the `Orders` table. Here's the relevant part of my trigger code: ```sql CREATE TRIGGER trg_AfterInsert ON Orders AFTER INSERT AS BEGIN INSERT INTO OrderSummary (OrderID, TotalAmount) SELECT i.OrderID, SUM(od.Amount) FROM inserted i JOIN OrderDetails od ON i.OrderID = od.OrderID GROUP BY i.OrderID; END ``` I also have another trigger on the `OrderDetails` table that updates the `OrderSummary` table whenever an order detail is added or modified: ```sql CREATE TRIGGER trg_AfterInsertUpdate ON OrderDetails AFTER INSERT, UPDATE AS BEGIN UPDATE os SET TotalAmount = (SELECT SUM(Amount) FROM OrderDetails WHERE OrderID = os.OrderID) FROM OrderSummary os WHERE os.OrderID IN (SELECT DISTINCT OrderID FROM inserted); END ``` The question I suspect is that the first trigger might be trying to fire the second one, causing a conflict. To troubleshoot, I checked the nesting level using `@@NESTLEVEL`, and it shows that the triggers are indeed cascading, which I think is leading to this behavior. I've tried modifying the triggers to use `AFTER INSERT, UPDATE, DELETE` for both tables and added checks to see if the data already exists in the `OrderSummary`, but it hasn't helped. What can I do to resolve this cascading trigger scenario? Is there a best practice I should follow to avoid such conflicts? This is part of a larger CLI tool I'm building. Has anyone else encountered this? My development environment is Windows.