How to call a SQL Server function?

How to call a SQL Server user defined function? The SQL syntax to call a function is different from the call to a stored procedure. Use SQL Server function the same way you select data from a table.

How to call a SQL Server function?

A SQL Server user-defined function is usually returning data, it can an empty result set, one line or multiple columns. For example, let’s call the function from this article on how to create a SQL Server function. The function displays the name of a customer based on the customer number.

SELECT dbo.ufnDisplayCustomers(1);

With this second call example, we can also rename the result column to personalize the output.

SELECT dbo.ufnDisplayCustomers(1) AS [Customer Name];

Let’s see how to modify an existing SQL Server function.

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