Nell'esempio seguente viene inviato un messaggio di posta elettronica a un utente specificato (MaryM) quando viene apportata una modifica alla tabella Buyer.The subsequent illustration sends an e-mail message to the specified man or woman (MaryM) when the Customer table alterations.To circumvent getting results returned to an application on account of a cause firing, do not contain either Pick statements that return outcomes or statements that perform variable assignment within a result in. Un trigger contenente istruzioni Choose che restituiscono risultati all'utente o istruzioni che eseguono assegnazioni di variabili richiede una gestione particolare. I risultati restituiti devono essere gestiti in ogni applicazione in cui sono consentite modifiche alla tabella di induce.A result in that features either SELECT statements that return results on the consumer or statements that complete variable assignment necessitates Exclusive handling; these returned effects would have to be composed into every single software by which modifications towards the bring about desk are authorized. Se è necessario eseguire un'assegnazione di variabile in un induce, utilizzare un'istruzione Established NOCOUNT all'inizio del induce for each impedire la restituzione dei established di risultati.If variable assignment have to happen in a very induce, make use of a SET NOCOUNT assertion Initially from the result in to stop the return of any end result sets. Anche se un'istruzione TRUNCATE Desk è in effetti un'istruzione DELETE, non attiva un result in in quanto tramite l'operazione non vengono registrate singole eliminazioni di righe.Though a TRUNCATE Desk statement is in effect a DELETE statement, it does not activate a induce since the operation will not log person row deletions. Solo gli utenti che dispongono delle autorizzazioni for each eseguire un'istruzione TRUNCATE TABLE devono tuttavia fare attenzione a non eludere un result in DELETE in questo modo.However, only those people with permissions to execute a TRUNCATE TABLE statement will need be worried about inadvertently circumventing a DELETE result in this fashion. L'istruzione WRITETEXT non attiva alcun trigger, indipendentemente dal fatto che sia registrata o meno.The WRITETEXT statement, no matter if logged or unlogged, doesn't activate a result in. Le istruzioni Transact-SQLTransact-SQL seguenti non sono consentite in un result in DML:The next Transact-SQLTransact-SQL statements are certainly not authorized in a very DML bring about:
For each creare un trigger DML, è necessario disporre dell'autorizzazione ALTER for each la tabella o la vista in cui si desidera creare il cause.To create a DML bring about necessitates Change authorization over the desk or check out on which the bring about is staying produced. For each creare un induce DDL con ambito server (ON ALL SERVER) o un result in LOGON è necessaria l'autorizzazione Manage SERVER for every il server.
Ricorsione indirettaIndirect recursion Quando viene utilizzata la ricorsione indiretta, un'applicazione aggiorna la tabella T1,With oblique recursion, an application updates desk T1.
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Textual content tables make use of a CSV (Comma Divided Value) or other delimited textual content file because the supply of their facts. You may specify an present CSV file, like a dump from An additional database or application, because the source of a Textual content desk. Alternatively, it is possible to specify an vacant file to get filled with details because of the database engine.
The user vp1 will not be a member of any mentioned person team. The question group is set to 'QG_B', so the question is assigned to queue two. The consumer analyst1 is really a member with the person group outlined in queue 3, but 'QG_B' matches queue 2, Therefore the query is assigned to queue two. The person ralph is not a member of any mentioned person group along with the query group was reset, so there isn't a matching queue. The question is assigned on the default queue. Document Conventions
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Applica l'ambito di un result in DDL o LOGON al server corrente.Applies the scope of the DDL or logon bring about to the current server. Se viene specificato questo parametro, il induce viene attivato quando si verifica event_type
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