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  SQL Server Tips by Gama and Naughter

Applications of XP_SMTPSENDMAIL

One interesting application of XP_SMTPSENDMAIL is to get email addresses from a table and send an email to all of them. The sample databases Northwind and Pubs have several tables with contact information for employees, customers, etc. but, surprisingly, none has an email field. It really does not matter because we need real email addresses to send the emails, in case this code is used to test the XP, and verifying that they reached their destination. For testing purposes we will create a table named EmployeeInfo, with only one field named email:

CREATE TABLE EmployeeInfo(email varchar(50))

The table will get three records (these email addresses should be replaced with valid ones, even one email will do for the test):

INSERT EmployeeInfo(email) VALUES('Adam@xpbook.org')
INSERT EmployeeInfo(email) VALUES('Briana@xpbook.org')
INSERT EmployeeInfo(email) VALUES('Carla@xpbook.org')


Finally, a cursor will read the email address field from the table and feed it into XP_SMTPSENDMAIL:

DECLARE @email VARCHAR(50)
DECLARE cur_email CURSOR FOR
SELECT email FROM EmployeeInfo
OPEN cur_email
FETCH NEXT FROM cur_email INTO @email
WHILE @@FETCH_STATUS = 0
BEGIN
EXEC master..XP_SMTPSENDMAIL @From='boss@company.com',
@To=@email, @Subject='Friday meeting',
@Body='Meeting has been cancelled.'
FETCH NEXT FROM cur_email INTO @email
END
CLOSE cur_email
DEALLOCATE cur_email


This example, for minimalism, assumes that the sender, body and subject will be the same for all the emails. They could be taken from the table itself or from other source.


The above book excerpt is from:

Super SQL Server Systems
Turbocharge Database Performance with C++ External Procedures

ISBN: 0-9761573-2-2
Joseph Gama, P. J. Naughter

 http://www.rampant-books.com/book_2005_2_sql_server_external_procedures.htm  

 

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