You can use a CASE statement in various places in your query, such as in the SELECT, WHERE, ORDER BY, or GROUP BY clauses. For example, suppose you have a table called customers with columns id ...

I'm joining two tables, one is a list of links and the other is a list of categories. The links are organized using a category ID. I would like to select all the links, and break them into ...

GROUP BY Clause: The “GROUP BY” clause helps summarize or aggregate data, such as calculating total profits, sales, or counting students in a department.For instance, it can be used to sum daily sales ...