PISA (Program for International Student Assessment) is a program of the OECD (Organization for Economic Cooperation and Development) for the evaluation of education policies. It consists of a series of tests and surveys conducted to 15 years old students, schools and parents at national level in the countries participating in the program (in 2012 there were 65 participating countries, and in 2015 there are more than 70). These tests seek to assess the level of knowledge in three main areas: Reading, science and math.
In this article I make a brief introduction to SQL Server database created from the original data published by the OECD.
POD (Portal Open Data) is a project that I started when I was studying to obtain Microsoft Web Developer MCSD, in order to do some practices. Consists of a SQL Server database through which on can access to other databases in a centralized way.
In this article I describe the POD Configuration database
All users of Google Analytics end up suffering the attacks of a legion of referral spam bots that distorting all data obtained from your website, this traffic can come to represent an amount much higher than the actual traffic visits.
In this article I explain how to remove all traffic of this type definitively from our statistics.