have to be a valid SQL ServerSQL Server identifier and must exist as a class within the assembly with assembly visibility. Se alla classe è stato assegnato un nome completo con lo spazio dei nomi le cui parti sono separate da '.L'innalzamento di livello dei privilegi consente l'esecuzione di malware all'interno dei result in.Destructive code within triggers can run underneath escalated privileges.
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Ricorsione direttaDirect recursion Quando viene utilizzata la ricorsione diretta, un'applicazione aggiorna la tabella T1,With direct recursion, the applying updates table T1. il che attiva il set off TR1 che aggiorna la tabella T1.This fires trigger TR1, updating desk T1. Poiché la tabella T1 è stata aggiornata, viene di nuovo attivato il trigger TR1 e il processo viene quindi ripetuto.Mainly because desk T1 was up-to-date, result in TR1 fires once again, and so forth. Nell'esempio seguente vengono utilizzati entrambi i tipi di ricorsione indiretta e diretta. Si supponga che per la tabella T1 vengano definiti thanks trigger di aggiornamento, TR1 e TR2.The next instance works by using equally indirect and immediate cause recursion Think that two update triggers, TR1 and TR2, are outlined on desk T1.
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This is important for the effective Procedure of software applications that situation elaborate, significant-frequency queries. It is particularly vital in the event the tables for being accessed can be found in distant devices.
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SQL deviates in several means from its theoretical Basis, the relational model and its tuple calculus. In that product, a desk is a list of tuples, while in SQL, tables and question effects are lists of rows: precisely the same row may well occur many periods, as well as the purchase of rows could be used in queries (e.g. inside the LIMIT clause).
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INSERT statements that use VALUES syntax can insert numerous rows. To do this, consist of several lists of comma-separated column values, with lists enclosed within parentheses and separated by commas. Case in point:
A difference can really be observed in selects with many options. Also, we are now not limited to the quantity of figures that one particular might use for identifier names so be sure to Absolutely everyone cease abbreviating.