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compare records in calculated field in query

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In access 2010, In a query I want a calculated field that will read a previous record then compare the data in the current record to the previous record or from the current record read the data in the next record and compare.
Apr 30 '13 #1
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Rabbit
12,516 Recognized Expert Moderator MVP
Compare in what way?
Apr 30 '13 #2

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