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When do we need return value from trigger procedure?
A row-level BEFORE trigger that does not intend to cause either of these behaviors must be careful to return as its result the same row that was passed in (that is, the NEW row for INSERT and UPDATE triggers, the OLD row for DELETE triggers).
When to use insert trigger instead of insert trigger in DML?
INSTEAD OF INSERT trigger requires one DML operation, you only need to modify values and insert rows, no subsequent update is required: This trigger also replaces any value inserted in the created column by a user with GETDATE () function: Firstly, let’s see how the trigger affects the insert performance in Oracle.
How to create TR _ Sales trigger after insert in SQL?
SQL Server : CREATE TRIGGER tr_sales ON sales AFTER INSERT AS BEGIN UPDATE sales SET created = GETDATE () FROM inserted WHERE sales. id = inserted. id; END GO. Now similar to Oracle BEFORE INSERT trigger, if a user explicitly specifies a datetime, it will be overwritten to the current datetime by the trigger:
When to use statement level instead of insert trigger?
SQL Server: Now similar to Oracle BEFORE INSERT trigger, if a user explicitly specifies a datetime, it will be overwritten to the current datetime by the trigger: SQL Server: In SQL Server, you can also use a statement-level INSTEAD OF INSERT trigger to overwrite inserted values.
When to use insert instead of trigger in Entity Framework?
For example if you had a CreatedDate column that uses GETDATE () you would make the select like this: Instead of trigger is executed instead of Insert operation created by Entity framework. This can be potential problem because once you are using identity column each insert is followed by: select [Id] from [dbo].
When to use alter trigger instead of trigger?
ALTER TRIGGER [dbo]. [CalcGeoLoc] ON [dbo]. [Address] INSTEAD OF INSERT AS BEGIN — SET NOCOUNT ON added to prevent extra result sets from — interfering with SELECT statements.