A
Akshay Guleria
Guest
I agree with onnodehaan . I would usually prefer to have a unique index on customer number if possible at all. In this case Solution 2 is simple to use. But if normalisation in not possible at all then use Solution 1. The only thing I would like to mention is that do not use colon `:` as a delimiter. Colon `:` is a common character used in URLs. For clarity reasons I would use some other character like underscore `_` or hyphen `-`. You can read more interesting stuff about URLs here , if you wish to.
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