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SQL Update using multiple WHERE conditions

Last Modified: 2015-04-29
I have a SQL 2008 R2 database with 2 fields in it, MaterialNo and SalesPerson. Lets say the database has 5,000 records in it. I was just informed via an Excel spreadsheet that 300 of these 5,000 material numbers have the wrong SalesPerson assigned. The spreadsheet lists all the 300 material numbers and the correct SalesPerson. Normally I would just use a simple

UPDATE table
SET SalesPerson='John Doe'
 WHERE MaterialNo='12345'

But I do not want to do 300 numbers one at a time like this. What would the process or syntax be to do something like this:

UPDATE table
SET SalesPerson='John Doe'

I am a SQL novice so don't assume anything :-)
thx experts...
Bob R
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