Provided are a techniques for determining a frequency distribution for a set of records. A count table of frequency distributions is built in memory for each field in the set of records, wherein each record of each count table includes a field identifier, a field value, and a count of a number of times...http://www.google.de/patents/US7565349?utm_source=gb-gplus-sharePatent US7565349 - Method for computing frequency distribution for many fields in one pass in parallel
