SQL Server Agent
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SQL Server Agent is a a component of Microsoft SQL Server which schedules jobs and handles other automated tasks. It runs as a Windows service so can start automatically when the system boots or it can be started manually. It is .
Typical system tasks performed include scheduling maintenance plans (such as backups), handling Reporting Services subscriptions and performing log shipping sub-tasks (backup, copy, restore & check). User tasks, such as scheduling some T-SQL or command line statement are also common.
SQLAgent has support for operators and alerts, so that administrators can be notified, e.g. by email.