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SQLRollingStats is a solution for SQL Server that extends and enhances your T-SQL programming environment by adding 30+ statistical window functions - allowing the computation of results per row that depend on values in other rows. All functions are capable of taking into account all rows so far processed, or just the last n rows where n is the specified window size. Functions include: sum, product, maximum, minimum, range, mid-range, first (in sequence), nth previous, average (mean), variance (sample & population), standard deviation (sample & population), geometric mean, harmonic mean, quadratic mean, median, quartile, inter-quartile range, tri-mean, percentile, percentile rank, exponential average (mean), exponential variance, exponential standard deviation, weighted average, weighted variance (sample & population), weighted standard deviation (sample & population), weighted power mean.
TotallySQL are specialists in application development centered around Microsoft SQL Server, and in particular in creating CLR-based function libraries that enable advanced processing to be carried out within the database itself. They provide a range of off-the-shelf function libraries and can also build bespoke libraries to your specification. They also provide a range of database and data management services - including database design, ETL services, data cleansing and data migration.