Its column-storebased data warehouse has enabled Airtel Vodafone to gain market share and become a major player in the European telecommunications sector.
His 6-foot-5 frame hunched towards a laptop, Ressi trains a finger at a column of numbers, each data point like a genetic marker in the DNA of an entrepreneur.
And since columns are stored contiguously, and tend to have similar data, compression can be very efficient, and searches along a column are likewise efficient.