sql - Loop and assign non-unique GUID to sets of values? -

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I easily believe this, but I can not go past the concept for the syntax I have a table of features like many rows where the name of the feature can populate: 

  [nAME], [GUID] Fred, minus Fred, minus Fred, minus Tom, null Mary, null Mary, null Mary null I null   
 I have assigned a GUID to the name you want to do:  
  Fred { 3b26af27-9d42-481c-a8c8-be1819dccda5} Fred, {3b26af27-9d42-481c-a8c8-be1819dccda5} Fred, {3b26af27-9d42-481c-a8c8-be1819dccda5} Tom, {ee64b706-def0-4e5c-a5fd-0c219962042e} Mary , {fd158f90-9705-4a18-b82c-baca29441401} me, {fd158f90-9705-4a18-b82c-baca29441401} me, {fd158f90-9705-4a18-b82c-baca29441401} me, {fd158f90-9705-4a18-b82c-baca29441401 }    
 
 
  table (name varchar (30), GUID uniqueidentifier) insert @tmp announced choose to select from (MyTable @tmp x.Name, NEWID () the difference name) X update MyTable set GUID = tmp.GUID from MyTable T insider @tmp which t.Name = on tmp tmp.Name

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