From your various descriptions of the problem I am still in doubt that you will get the result that you want.
A more complete description of what you are trying to accomplish and the actual conditions would help others to understand the question and offer suggestions. For example, is there really just one column, or five (you have said both)? Are you expecting the 100 rows of domain names to be pre-filled and persist when you fill in the other unspecified columns? It wont work that way...
You were asked whether there were any key columns and said that there weren't. If there were any then you could UPDATE those with a range of keys specified in a simple WHERE clause... but with our confusion on the table structure...
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