COLUMNAR STORAGE REPRESENTATIONS OF RECORDS

A computer system accesses a collection of data records. Each record in the collection includes a plurality of data values and a plurality of data elements that identify semantics of corresponding data values from the plurality of data values. One or more of the data records each include multiple instances of a same data element and include data values that correspond to the multiple instances of the same data element. The computer system generates a collection of columnar stripes. The collection of columnar stripes includes the data values from each data record in the collection of data records. Each columnar stripe in the collection of columnar stripes includes all data values that correspond to a specific data element from each of the records in the collection of records.