IT Nursery
What’s the difference between RANK() and DENSE_RANK() functions? How to find out nth salary in the following emptbl table? DEPTNO EMPNAME SAL ------------------------------ 10 rrr 10000.00 11 nnn 20000.00...
Suppose I have pandas DataFrame like this: df = pd.DataFrame({'id':[1,1,1,2,2,2,2,3,4],'value':[1,2,3,1,2,3,4,1,1]}) which looks like: id value 0 1 1 1 1 2 2 1 3 3 2 1 4 2...
Can someone please explain what the partition by keyword does and give a simple example of it in action, as well as why one would want to use it?...
I’ve been using GROUP BY for all types of aggregate queries over the years. Recently, I’ve been reverse-engineering some code that uses PARTITION BY to perform aggregations. In reading...