>>>I have a table of voter info called Farmers with 92K rows in it. I also have a table of voters called tblCamp_CT with 9 million rows. I added a column to tblCamp_CT called 'IsFarmer' TINYINT.
>>>
>>>I now need to go through the Farmers table and for every row find the person in the tblCamp_CT using First Name, Last Name, Middle Name, and maybe some other info. If that person exists in the tblCamp_CT table, then set IsFarmer to 1.
>>>
>>>Wat's the best way to do something like this?
>>
>>

>>WHILE (2 > 1)
>>  BEGIN
>>    BEGIN TRANSACTION
>>    UPDATE TOP ( 10000 ) tblCamp_CT SET isFarmer = 1
>>    FROM tblCamp
>>    INNER JOIN Farmers ON ....
>>    WHERE  tblCamp.isFarmer = 0
>>    
>>    IF @@ROWCOUNT = 0
>>      BEGIN
>>        COMMIT TRANSACTION
>>        BREAK
>>      END
>>    COMMIT TRANSACTION
>>  END -- WHILE
>>

>
>Boris,
>
>It's a good idea to use a loop, but we need a different field to use, say, Processed. Otherwise you will be running an infinite loop, since not all people are farmers.

Nope, it wouldn't go to infinite loop.
WHERE tblCamp.isFarmer = 0 will filter only these records where the people are not farmers.
INNER JOIN will ask only for these that ARE farmers :-)