x

How to Execute Sql UDF function

I want to convert nvarchar to ascii value, So I want to create udf function, but i don't know to execute the function.

please anyone know, give me the solutions

more ▼

asked Oct 25, 2009 at 10:52 AM in Default

Prabhakar gravatar image

Prabhakar
22 2 2 2

(comments are locked)
10|1200 characters needed characters left

2 answers: sort oldest

A scalar function is basically an expression. You use it in a query just as you would a column name, variable, or formula. Obviously you have to pass parameters to it in the query.

select colA, colB, @amt, colA+colB, dbo.ufNvarcharToAscii(colC)

Although this is outside the scope of your question, a scalar function should not be confused with a table-valued function. A scalar function produces a single result value, while a table-valued function can produce a set of rows and is used either like a table, or in conjunction with APPLY. Inline table-valued functions are treated much like views by the optimizer and can produce performance benefits over scalar functions when applied to a large number of rows.

select * from dbo.tfnListOpenOrdersForCustomerNo(custno)select c.custNo,c.custname,t.orderno from dbo.Customers c cross apply dbo.tfnListOpenOrdersForCustomerNo(custno) as t 
more ▼

answered Oct 25, 2009 at 11:09 AM

Bob Hovious gravatar image

Bob Hovious
1.6k 5 6 9

(comments are locked)
10|1200 characters needed characters left

Say you have created that UDF - then you would call it with

SELECT schema.functionname(parameter)

So you might say

SELECT @asciiValue = dbo.ConvertToAscii(@nvarcharValue)

However, in this case, you would be well advised to use the ASC built in function.

more ▼

answered Oct 25, 2009 at 11:08 AM

Matt Whitfield gravatar image

Matt Whitfield ♦♦
29.5k 61 65 87

Thanks for sorting out my formatting Mel! :)
Oct 26, 2009 at 06:33 AM Matt Whitfield ♦♦
(comments are locked)
10|1200 characters needed characters left
Your answer
toggle preview:

Up to 2 attachments (including images) can be used with a maximum of 524.3 kB each and 1.0 MB total.

New code box

There's a new way to format code on the site - the red speech bubble logo will automatically format T-SQL for you. The original code box is still there for XML, etc. More details here.

Follow this question

By Email:

Once you sign in you will be able to subscribe for any updates here

By RSS:

Answers

Answers and Comments

SQL Server Central

Need long-form SQL discussion? SQLserverCentral.com is the place.

Topics:

x58

asked: Oct 25, 2009 at 10:52 AM

Seen: 12560 times

Last Updated: Oct 25, 2009 at 10:52 AM