The problem that I face is in what way if there is issue like the example below:

Codes 1000, 2000, 3000, 4000, 5000

ID 1, 2, 3

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This:

ID number 1 has codes 1000, 2000, 3000, 4000

ID number 2 has codes 2000, 4000, 3000

ID number 3 has codes 3000, 4000, 5000

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When all the fields are connected, each ID has found the same codes. From the example above, I want to produce fair result and adjusted to the code that it had before on each ID as below:

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To be:

ID number 1 has codes 1000, 2000 (1000 must be on number 1 cause only it has than other)

ID number 2 has codes 3000, 4000

ID number 3 has codes 5000 (5000 must be on number 3 cause only it has than other)

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Some say using Round Robin, but I never heard Round Robin before and I don't have idea how to use it, such a blank mind. Is there another easier way like to use PHP may be? I'm lost.

Thanks.