Chasm trap   in data warehouses occurs when two fact tables relate into one dimension table. This is a data modelling problem which will cau...

Do you want a notebook where you can write some SQL queries to a database and see the results either as a chart or table? As long as you c...

Sometimes you need to ask this most simple question about your database to figure out what the real size of your data is. Databases store lo...

Reading about cluster computing developments like Apache Spark and SQL I decided to find out. What I was after was to see how easy is to w...

One should feel really sorry about anyone who will rely on filtering and making a decision based on bad, bad data. It is going to be ...