A SELECT statement clause that divides the query result into groups of rows, usually by performing one or more aggregations on each group. The SELECT statement returns one row per group. Specifies a ...

Learn some of the best techniques for optimizing SQL queries with GROUP BY clauses, such as choosing the right columns, using indexes, avoiding unnecessary calculations, and using subqueries.

Using the combination of a group by clause and the count () aggregate function, you are able to generate exactly the data needed to answer the business question without having to look at the raw data.

SQL is neither the fastest nor the most elegant way to talk to databases, but it is the best way we have. Here’s why Today, Structured Query Language is the standard means of manipulating and ...

One of the crucial features of Access is the GROUP BY query. It refers to a powerful and essential SQL command that is used to group data based on particular criteria. Essentially, the GROUP BY query ...

It’s surprisingly easy to stop query folding happening in Power Query by changing the data type of a column. This is mentioned in the docs here, and it’s something several people have blogged about ...

Notice how the original SQL query I used as the source of the table is used as a subquery in this query. This is how Power BI generates its SQL and this is why there are limitations on the SQL you can ...