SQL Server string manipulation using T-SQL leaves lots to be desired. Many postings and complaints about T-SQL deal with strings, but there are ways to work with it. Author Eli Leiba brings us a way to split out portions of a string that contains tokens with a user defined function. Read on to see how this is accomplished and the code used to perform the splitting.
2004-12-27
12,223 reads
User defined functions were added in SQL Server 7 and enhanced in SQL Server 2000, but they are still a relatively little used feature. Here's a look at a unique way that Leo Peysakhovich solved a problem using a UDF.
2004-09-07
11,138 reads
Dinesh is back with another article on user defined functions, giving some more great examples. If you haven't read the first one, definitely go back and read it first.
2003-07-14
7,107 reads
UDF's are useful if somewhat tricky. Dinesh uses a common scenario where you have a self referencing table (the common example is an employees table where each employee has a managerid that links to another employee in the same table) to illustrate how a UDF can make querying easier, how to use it as the basis of a computed column, and how to index that column.
2003-06-18
12,313 reads
Alxander Chigrik presents some useful User Defined Functions you can add to your SQL Server.
2001-12-19
8,653 reads
Alexander Chigrik presents a few UDFs he has developed for getting meta data about your database objects.
2001-10-17
4,122 reads
Many programming languages have supported User Defined Functions for years, but they are new to SQL Server 2000. In this article we will look at some of the ways functions can be used within SQL Server 2000.
2004-10-22 (first published: 2001-05-02)
21,166 reads
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There is a table tmp_tab:
CREATE TABLE tmp_tab ( id int, val int );
INSERT INTO tmp_tab VALUES (1, 1), (2, NULL), (3, 3), (4, 4), (5, 5);You want to order the rows ids by the following expression:
ISNULL(val, id) + 1Which of the following queries produces the expected ordering and why? (Select all correct) See possible answers