T-SQL User-Defined Functions: the good, the bad, and the ugly (part 1)

Posted by Hugo Kornelis on SQL Blog See other posts from SQL Blog or by Hugo Kornelis
Published on Sun, 20 May 2012 14:08:00 GMT Indexed on 2012/05/30 16:54 UTC
Read the original article Hit count: 371

Filed under:

Personal

|

t-sql

|

udf

So you thought that encapsulating code in user-defined functions for easy reuse is a good idea? Think again! SQL Server supports three types of user-defined functions. Only one of them qualifies as good. The other two – well, the title says it all, doesn’t it? The bad: scalar functions A scalar user-defined function (UDF) is very much like a stored procedure, except that it always returns a single value of a predefined data type – and because of that property, it isn’t invoked with an EXECUTE statement,...(read more)

© SQL Blog or respective owner

Related posts about Personal

GAE Datastore Put()

as seen on Stack Overflow - Search for 'Stack Overflow'
def post(self): update = self.request.get('update') if users.get_current_user(): if update: personal = db.GqlQuery("SELECT * FROM Personal WHERE __key__ = :1", db.Key(update)) personal.name = self.request.get('name') personal.gender = self.request… >>> More
Trying to find a good strategy using Git for personal development on local/personal machine

as seen on Stack Overflow - Search for 'Stack Overflow'
A noob here. I have a personal Macbook and I want to use Git to track the changes etc. I want to just init a repo on my macbook and work there. Is this a good idea? What if: I have a main repo somewhere in my Macbook HD, like, /Users/user/projects/project1 and clone it to another area on my macbook… >>> More
Virtualhost entries gets over-written when apache httpd.conf is rebuilt

as seen on Server Fault - Search for 'Server Fault'
Background: We have been trying to get a wildcard SSL working on multiple sub domains on a single dedicated address.. We have two sub domains next.my-personal-website.com and blog.my-personal-website.com Part of our strategy has been to edit the httpd.conf and add the NameVirtualHost xx.xx.144.72:443… >>> More
CRM 2011 - Workflows Vs JavaScripts

as seen on Programmers - Search for 'Programmers'
In the Contact entity, I have the following attributes Preferred email - A read only field of type Email Personal email 1 - An email field Personal email 2 - An email field Work email 1 - An email field Work email 2 - An email field School email - An email field Other email - An email field Preferred… >>> More
WPA2 Personal - Deploying via GPO

as seen on Server Fault - Search for 'Server Fault'
I've got 300+ win7 clients I need to deploy WPA2 Personal PSK on. I can use a GPO to deploy the SSID information on the clients which is good but not the PSK. Is there a clean/easy way to script it so the PSK can be entered on the machines? If possible I don't want to give the PSK to the end users. >>> More

Related posts about t-sql

SQL SERVER – Concat Strings in SQL Server using T-SQL – SQL in Sixty Seconds #035 – Video

as seen on SQL Authority - Search for 'SQL Authority'
Concatenating string is one of the most common tasks in SQL Server and every developer has to come across it. We have to concat the string when we have to see the display full name of the person by first name and last name. In this video we will see various methods to concatenate the strings. SQL… >>> More
Writing A Transact SQL (TSQL) Procedure For SQL Server 2008 To Delete Rows From Table Safely

as seen on Dot net Slackers - Search for 'Dot net Slackers'
In this post, we will show and explain a small TSQL Sql Server 2008 procedure that deletes all rows in a table that are older than some specified date. That is, say the table has 10,000,000 rows in it the accumulated over the past 2 years. Say you want to delete all but [...]...Did you know that… >>> More
difference between tsql, access sql and pl/sql

as seen on Stack Overflow - Search for 'Stack Overflow'
i am very confused please help to clarify these differences! are they all completely different languages? what is the overlap? >>> More
SQLAuthority News – Microsoft SQL Server Protocol Documentation Download

as seen on SQL Authority - Search for 'SQL Authority'
The Microsoft SQL Server protocol documentation provides detailed technical specifications for Microsoft proprietary protocols (including extensions to industry-standard or other published protocols) that are implemented and used in Microsoft SQL Server to interoperate or communicate with Microsoft… >>> More
SQL SERVER – Interview Questions & Answers Needs Your Help

as seen on SQL Authority - Search for 'SQL Authority'
About an year ago, I had posted SQL Server related Interview Questions and Answers. It was very well received in community. I have received many comments, suggestions and emails on this subject. I am planning to upgrade the Interview Questions and Answers and take it to next level. Here, I need your… >>> More