As expected, the FIRST_VALUE and LAST_VALUE window functions return the first and last value in their partition. However, prepare for some surprises along the way, especially for LAST_VALUE. We’ll show you how to call them properly and how to emulate them with ROWS BETWEEN.
LAG window function looks at some row behind. It can be emulated with the ROWS BETWEEN clause. We do it here and then compare it with the direct call. Finally, we show you how LAG works with a visual image of the partition used by both LEAD/LAG and the ROWS-based window functions.
We emulate the SQL Lead window function with the ROWS BETWEEN clause, and compare it with a direct call. We show you a visual image of the partition on which both LEAD/LAG and ROWS-based window functions work.
Find out who created the Stream Graph or the Chord diagram, the Sparklines or the Bullet Graph, the Pie chart and the Bar chart. And why exactly we also know the Polar Area chart as Nightingale Rose. This is a list of data scientists and other influencers in data visualization, credited as inventors of a particular type of chart.
There is no PIVOT operation in MySQL, but you can write tedious SQL queries to generate cross-tables. Use just a fraction of your time instead, and visually design complex PIVOT queries for MySQL with our Data Xtractor. You do not even need to know SQL, as our queries will be automatically generated for you.