SQL Server, multiple "GROUP BY" in a single statement? The GROUPING SETS explained in a CLEAR way and with EXAMPLES!
Hi Guys! Welcome back! Today we will talk about GROUPING SETS. As usual I will try to explain what we are talking about in the clearest possible way and we will always give examples . So what is a GROUPING SET? GROUPING SETS can be considered an extension of the GROUP BY clause in fact it gives you the possibility to combine multiple GROUP BY clauses . How many times do we have to show in video a series of data that maybe adding them up and regrouping them for more than one field? How many times have we had to use UNION clauses? Often many clauses union together make the code less readable and less maintainable. The solution is to use GROUPING SETS. Enjoy the reading! GROUPING SETS As said, a grouping set can be considered as an extension of the GROUP BY clause. Speaking in a technical way, SQL grouping sets are a way to group data in SQL queries by multiple dimensions. Now, in a typical SQL GROUP BY clause, data is grouped by one or more columns. For example, if you hav
