Microsoft Access Archives

SQL Count(*), Count(cte), Count(column), Count(pk), … x Inner and Outer Joins

In SQL, The Count function counts the number of values in a set. Such function accepts a parameter, that specifies[…]

For many people, using noncorrelated subqueries (using In/Not In) seems to be more natural than using Exists/Not Exists and correlated[…]

Python has become one of the most popular programming languages and is used in various contexts, including in WEB applications[…]

LEAD and LAG are window functions that enable the simultaneous access to a table’s row and to other row related[…]

There are a lot of options to use when testing for NULL values in SQL. One should use built-in functions[…]