sqlserver 觸發器 區分insert, update,delete

sqlserver 觸發器 區分insert, update,delete

https://stackoverflow.com/questions/741414/insert-update-trigger-how-to-determine-if-insert-or-update

CREATE TRIGGER dbo.TR_TableName_TriggerName
    ON dbo.TableName
    AFTER INSERT, UPDATE, DELETE
AS
BEGIN
    SET NOCOUNT ON;

    IF NOT EXISTS(SELECT * FROM INSERTED)
        -- DELETE
        PRINT 'DELETE';
    ELSE
    BEGIN
        IF NOT EXISTS(SELECT * FROM DELETED)
            -- INSERT
            PRINT 'INSERT';
        ELSE
            -- UPDATE
            PRINT 'UPDATE';
    END
END;