Be Careful with String Concatenations in SQL Server with Big Strings.
Now, we are going to get slightly esoteric here. I'd noticed that the performance of string concatenation tasks didn't increase...
2009-02-16
14,618 reads
Phil Factor
- Interests: Motorbikes, Beer, gardening, conservation, Local history.
Inserting Markup into a String with SQL
There are a number of occasions when one might want to insert information at various places in a string. Where...
2009-02-12
1,893 reads
The Wickedness of the mass 'REPLACE()'
I have been admonished in the past for the use of this code which makes as many
substitutions as you like...
2009-01-23
1,173 reads
Sniffing out bogus data
/* Imagine that you have some names and addresses. You are anxious to look at the addresses that may be spurious....
2008-11-03
680 reads
SQL Server Messages: fairies rearranging furniture.
SQL Server and Sybase are geared up
to send information to applications over two distinct channels, the results in
one channel that...
2008-10-20
914 reads
Validating text data. A few techniques.
/*datafile used in the SQL */
DECLARE @String VARCHAR(MAX)
SELECT @String = 'When you are starting out to validate text input, perhaps to clean...
2008-10-09
1,111 reads
Rendering code nicely in blogs and forums.
I wrote the prettifier specifically to help with posting SQL into blogs and forums. You can find it here http://extras.sqlservercentral.com/prettifier/prettifier.aspx...
2008-10-07
6,676 reads
Un-concatenating row values
/* Anith Sen's achievement, in his article 'Concatenating Row Values in Transact-SQL' has been to list and illustrate the many ways...
2008-10-06
1,764 reads
Never say 'never' to the WHILE loop.
/* download the test text file Moby-Dyck.zip here */
/* You might notice that I refer to Moby **** in this blog. This is because the busybodyish...
2008-10-02
2,261 reads
Blogs
A Last Minute Trip to the EU
By Steve Jones
My life has some crazy travel stretches for sure. Between speaking, office visits, customer...
Part 3 of 3: Tuning DiskANN — R, Alpha, L, Beam Width, Recall and Latency
In Part 1, we saw how ‘Vamana’ represents vectors as nodes, connects them with...
Automated SQL Server Benchmarking with HammerDB and Docker: A Complete Testing Framework
I’m excited to announce the release of a new open-source project that fully automates...
Forums
Server-Level Table sizes
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Optional Parameter Plan Optimization in SQL Server 2025: Fixing the Kitchen-Sink Search Procedure
Comments posted to this topic are about the item Optional Parameter Plan Optimization in...
Question of the Day
ORDER BY alias
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