You can use the string expression argument in an SQL aggregate function to perform a calculation on values in a field. For example, you could calculate a percentage (such as a surcharge or sales tax) by multiplying a field value by a fraction. The following table provides examples of cal...
As seen in the examples above, it can be a good idea to have no filter in the view definition but rather be able to filter data when selecting from the view. However, it can also be a good idea to hide data from a user that you do not want the user to see. User-Defined SQL ...
In this article, you are going to learn about SQL Time Functions. Each SQL Time Function will be explained with practical and real-life examples. Like SQL Date Functions, Time functions can have different versions in different Database Management Systems like MySQL, ORACLE, and MS SQL Server. ...
Learn about the SQL ~'GROUP BY~' clause. Review examples of how to use GROUP BY in SQL queries on aggregate functions, such as COUNT, SUM, AVG,...
Well organized and easy to understand Web building tutorials with lots of examples of how to use HTML, CSS, JavaScript, SQL, Python, PHP, Bootstrap, Java, XML and more.
Aggregate functions are a very powerful tool in databases. They serve the same purpose as their equivalents in MS Excel, but the magic is that you can query data and apply functions in the same statement. Today, we’ve seen basic examples. Later in this series, we’ll use them to solve...
See detailed examples of how to rank rows in SQL. You’ll learn about ranking functions, including RANK(), DENSE_RANK(), and ROW_NUMBER(). Read more The LAG Function and the LEAD Function in SQL What are positional functions LAG() and LEAD()? What are the differences, and when do...
SQL Server has several different date and time functions and trying to remember every function is not that easy. So, I put together this tutorial that shows the different date and time functions all in one place along with examples to make finding what you are looking for much easier to fin...
It is interesting that many people working with data have no clue about window functions in SQL. During a long period of time instead of using window functions, I preferred coding in Python and panda…
Table-valued function examples Show 2 more Applies to: SQL Server Azure SQL Database Azure SQL Managed Instance Azure Synapse Analytics Analytics Platform System (PDW) This article describes how to create a user-defined function (UDF) in SQL Server by using Transact-SQL. ...