Monthly Archives: February 2015

COUNT function and NULL values in T-SQL

Simple and basic rule: Except for COUNT, aggregate functions ignore null values (Source: Just remember this rule! But there is a catch to this simple rule. Especially with the COUNT function. Let us first provide a simple table and

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Following SQL Saturday Events

For all SQL Saturday enthusiast, I want to share this info with you. I will be speaking at: – SQL Saturday Pordenone (28. February 2015) – SQL Saturday Budapest (18. April 2015) – SQL Saturday Lisbon (16. May, 2015 More

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Speaking at SQL Saturday Pordenone 2015

Welcome to SQL Saturday Pordenone Event and I welcome you to take part at my session.

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Fifty Shades of R

One of many summaries of the book – Fifty Shades of Grey in R Code. library(colorspace) par(bg=”thistle”) fiftyShades { n plot(10, 5, type=”n”, xlim = c(0, 1), ylim = c(0, 1), axes = FALSE, xlab=”Fifty Shades of Grey”, ylab =

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Valentine’s Day with R

Playing with ggplot2 library in R and produce some handy things useful on Valentine’s day. Flower: library(ggplot2) Valentine =function(x) 1-cos(x) opt=theme(legend.position=”none”, panel.background = element_rect(fill=”white”), panel.grid = element_blank(), axis.ticks=element_blank(), axis.title=element_blank(), axis.text =element_blank() ) ggplot(data.frame(x = c(2, 10*pi)), aes(x)) + stat_function(fun=Valentine, geom=”density”,

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