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6. SQL Server Agent.


All SQL Server Agent details are maintained by MSDB databases, which store all the below information
  • All individual jobs and maintenances plan related jobs.
  • Schedules of all jobs.
  • Operator, Database mails.
  • All Alerts related information.
  • All the Error log information is stored here.

What is SQL server Agent?

SQL Server is an individual service and it’s a default service which comes with the SQL server engine service, All the agent is stored in msdb.

Why SQL server Agent?

This SQL server agent is used for providing automation for all SQL server administrative tasks.

What is operator?

All the notifications of a job are received by this person based on the job status.

What is Database mail?

Database mail is the from address from where and which SMTP the notification to Operator need to send is given while configuring database mail,

Only user with DatabaseMailUser role can configure this,

By default Database mail is not enabled in older versions, we use SSAC(SQL Surface Area Configuration) to enable that feature in older versions, but now we can directly enable it from SSMS.

Example of Operator and Database Mail:

Simply said,
The SQL Agent needs to send a notification to an email address about a job status, 
  • So here Operator means to address of a user, when configuring an operator, we give an email address which says to which the notification needs to be sent.
  • And the database mail is the from address, when configuring Database mail, we give the SMTP and port, domain which says from where the notifications need to send.

Some of Default - Additional MSDB database role:

Below are some database user roles only in MSDB databases and their users they are:
    • DatabaseMailUserRole
    • db_ssisadmin
    • db_ssisltduser
    • db_ssisoperator
    • SQLAgentOperatorRole 
    • SQLAgentReaderRole
    • TargetServersRole
    • dbm_monitor
    • dc_admin
    • dc_operator
    • dc_proxy


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Microsoft SQL Server Architecture

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1. Starting with SQL Server

Topics In This Module. Responsibilities of Database Administrator  Types of DBAs  History of SQL Server  Editions of SQL Server  Tools of SQL Server  Differences between Standard and Enterprise editions  Instances types in SQL Server  SQL Server Services 
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2. Installation, Patching, Migration, Upgradation of SQL Server.

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