We sometimes forget the impact of early mathematicians. Take for example John Venn who introduced the Venn diagram in 1881.
This is fundamental for Set Theory, and also fundamental for SQL, the basis of retrieving data in a RDBMS.
Producing IQR and Outlier statistics with SQL
The interquartile range (IQR) measures the spread of the middle 50% of a distribution — the distance between the first quartile (Q1) and the third quartile (Q3). Combined with Tukey’s 1.
Producing Mode statistics with SQL
The mode is the value or values that appear most frequently in a dataset. Unlike the mean or median, it applies naturally to categorical and ordinal data — star ratings, product codes, survey responses — and reveals what is most common, not what is average.
Extending MySQL Capabilies with UDFs, Plugins and Components - Part 2
MySQL offers three different approaches to extending the SQL capabilities with the default product you download and install. These are: User Defined Function (UDF) MySQL Manual MySQL Plugin MySQL Manual MySQL Component MySQL Manual In my prior post I provided a new uuidv function that accepted a numeric argument to return a string of the version of UUID specified.