Finding persons without using a unique identifier

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Finding persons without using a unique identifier

Author

Topic

velvettiger
Posting Yak Master

115 Posts

Posted - 2009-11-10 : 14:14:08

I have a file which contains first and last names only, lets call this list customer1. I need to find those customers who are in customer1 that are not in the main database.

Customer1 does not have any unique identifier, so I would need to use the first and the last name together.

Can this be done????

Customer1 -Looks like this


firstname    Lastname
Alexis	     Garcia
Darlene	     Greaves
Delcina	     Blackman

MainTable


Cardnumber firstname  lastname
1          Amanda      Morris
2          Mary        Amos
3          Justin      Gill
4          Darlene     Greaves
5          Mary        Amos

webfred
Master Smack Fu Yak Hacker

8781 Posts

Posted - 2009-11-10 : 14:19:06

select * from customer1 as c1
where not exists(select * from MainTable where firstname=c1.firstname and lastname=c1.lastname)

No, you're never too old to Yak'n'Roll if you're too young to die.

velvettiger
Posting Yak Master

115 Posts

Posted - 2009-11-12 : 10:15:53

Thanks a million :)

X002548
Not Just a Number

15586 Posts

Posted - 2009-11-12 : 11:36:26

Understanding of course that John Smith or Jet Li, etc may be many different people

Brett

8-)

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