Learn how to use the SQL COALESCE() function to handle null values, combine columns, and clean up your data with real-world examples and tips.
Remember that a correlated subquery is a subquery that uses values from the outer query. And note that, even though NULL can work in this context as a “constant”, it’s very confusing! Consider the following example to understand what is meant by using a constant: SELECT driverslicensenr...
The main usage of SSAS is to build OLAPS / online analytical processing. The basic idea To create OLAP is to trade increased Storage space for Speed of Querying. OLAP does This by pre-calculating and storing aggregates when you identify the data that you want To store in an OLAP Database...