What are Catalog view in SQL server ?
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Adatabase triggerisprocedural codethat is automatically executed in response to certaineventson a particulartableorviewin adatabase. The trigger is mostly used for maintaining theintegrityof the information on the database. For example, when a newrecord (representing a new worker) is added to the employees table, new records should also be created inthe tables of the taxes, vacations and salaries. Triggerscan also be used to log historical data, for example to keep track of employees' previous salaries.
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