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Re: Database Challenge

• To: mathgroup at smc.vnet.net
• Subject: [mg106124] Re: [mg106106] Database Challenge
• From: Adriano Pascoletti <adriano.pascoletti at dimi.uniud.it>
• Date: Sat, 2 Jan 2010 05:04:46 -0500 (EST)
• References: <201001011037.FAA05389@smc.vnet.net>

Copy and paste from your message to the string data, then compute

First /@ GatherBy[ImportString[data, "Lines"], StringTake[#, 11] &]


data = "025-60-4044       joe average
  004-16-4077       jane doe
  014-27-9076       mike smith
  098-43-2098       rodolfo pilas
  073-15-6005       gustavo boksar
  004-16-4077       jane a. doe
  147-79-9074       bea busaniche
  165-63-0189       pablo medrano
  124-96-7092       jeff aaron
  004-16-4077       jane anne doe
  172-30-6069       michael peters
  059-85-1062       leroy baker";

First /@ GatherBy[ImportString[data, "Lines"], StringTake[#1, 11] &]


{"025-60-4044 joe average", "004-16-4077 jane doe",
   "014-27-9076 mike smith", "098-43-2098 rodolfo pilas",
   "073-15-6005 gustavo boksar", "147-79-9074 bea busaniche",
   "165-63-0189 pablo medrano", "124-96-7092 jeff aaron",
   "172-30-6069 michael peters", "059-85-1062 leroy baker"}


Adriano Pascoletti


2010/1/1 Nicholas Kormanik <nkormanik at gmail.com>

>
> There are 12 records in this mini database.  Two columns.  First
> column are social security numbers.  Second column are names.
> Unfortunately Jane Doe appears three times, with three different
> versions of her name, but having the same social security number.
>
> Challenge:  Remove the duplicates, where social security is the same,
> and keep any one of the names.  Final result will be whittled down to
> 10 records.
>
> (Real life problem has 6.5 million records, and lots of duplicates,
> with various versions of names.)
>
>
> 025-60-4044       joe average
> 004-16-4077       jane doe
> 014-27-9076       mike smith
> 098-43-2098       rodolfo pilas
> 073-15-6005       gustavo boksar
> 004-16-4077       jane a. doe
> 147-79-9074       bea busaniche
> 165-63-0189       pablo medrano
> 124-96-7092       jeff aaron
> 004-16-4077       jane anne doe
> 172-30-6069       michael peters
> 059-85-1062       leroy baker
>
>

• References:
  • Database Challenge
    • From: Nicholas Kormanik <nkormanik@gmail.com>