The COALESCE function in SQL is like a safety net for data. Imagine you have a friend who promised to bring you either an apple or a banana, but they might forget. You can use COALESCE to make ...

Learn how to master the SELECT statement to form truly useful data queries. This article explains functions, clauses, and keywords that will make your life a lot easier.

To fix the query, include the specific aggregation for the “age” column, like the average age: select state, avg(age) as Age, count(*) as no_of_residents from people group by state. This executes ...

Here's something that will Blow Your Mind if you're a Power Query/M fan. Did you know that there's a way you can get query folding to work if you're using a native SQL query on SQL Server or Postgres ...