The SQL Group By Clause
This is the written version of a lesson from my SQL Course, in which I introduce students to the awesome and very commonly used SQL GROUP BY clause. If you want to follow along, here is the script you can… Continue Reading
aggregate
The FIRST and LAST functions in Oracle SQL
This is the written version of a lesson from my SQL Course, in which I show how to use the FIRST and LAST functions. Like some other functions you probably know, these functions can be used either as aggregate functions… Continue Reading