SQL is an easy to learn yet powerful language when it comes to Data Analysis. There are however, some functionalities that usually take longer to understand and therefore put into practice. One of ...

You can also combine SQL CASE and IF statements to create more complex and nested conditions in your queries. For example, suppose you have a table called products with columns id, name, price ...

The next example shows how to use a subquery that contains a Pass-Through query. A subquery is a nested query and is usually part of a WHERE or HAVING clause. A subquery is contained in parentheses ...

Quite often, in Power Query, you want to ‘nest’ calculations and transformations – apply them not across the whole table, but repeat the same calculation or transformation across multiple groups of ...

In the software industry, Structured Query Language (SQL) remains a highly sought-after skill required by most employers. SQL is widely adopted as the preferred declarative language to manipulate data ...