merging partial duplicates

merging partial duplicates (please help)

Dear reader,

I have a question in regards to preparing my dataset for research.

I have a dataset in SPSS 20 in long format as I am researching on individual level over multiple years. However some individuals were added twice to my dataset because there were differences in some variables matched to those individuals (5000 individuals with 25 variables per individual). I would like to merge those duplicates so that I can run my analysis over time. For those variables that differ between the duplicates I would like spss to make additional variables when all the duplicates are merged.

Is this at all possible and if yes HOW?

Kind regards,
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