to reduce each arbitrary pivot presentation chosen by the user into a continuously ordered arrangement of data values e g a sequence vector of the underlying facts quantity a preferred embodiment of that mechanism is illustrated by way of fig2 a c in the present embodiment as depicted in fig2 a the underlying real facts table at first is extended by continuous index values 200 left column that provides a continuous numbering of the facts from u2018 1 u2019 to u2018 20 u2019 in the present example in the resulting pivot view shown in fig2 b in each cell 210 the indices of those facts are presented which sales value has to be summed up in the corresponding cell as mentioned beforehand the pivot view shown in fig2 b is generated on the basis of a sequence vector the underlying sequence vector for the pivot view in fig2 b is depicted in fig2 c and consists of two columns 260 270 the left column 260 containing continuous numbers from again u2018 1 u2019 to u2018 20 u2019 in the present example and the right column 270 containing the pre mentioned index values 275 depicted in fig2 a in an ordered arrangement that enables sequentially building up the pivot view of fig2 b for a better understanding of that sequence vector the content of the sequence vector is illustrated in the reverse direction i e starting from the pivot view depicted in fig2 b thus summing up the indices line for line and from the left to the right in the cells 210 of the pivot presentation as indicated in the first two lines of the pivot view.