SELECT COUNT(*) vs COUNT(1) vs COUNT(ColumnName)
What is the difference between COUNT(*), COUNT(1) and COUNT(ColumnName)? A mystery that will never be known… ok that was a...
2011-09-15
13,135 reads
What is the difference between COUNT(*), COUNT(1) and COUNT(ColumnName)? A mystery that will never be known… ok that was a...
2011-09-15
13,135 reads
Those who know me will know that this post is a little out of the ordinary… I am posting about...
2011-08-12
2,753 reads
I’ll be honest, I am partially writing this because I always forget how to reset the identity column on a...
2011-08-11
1,311 reads
First of all if you came out to my webinar this morning let me say a huge thank you! I...
2011-08-10
627 reads
Tomorrow I will be presenting a webinar at 11 AM eastern time for the Pragmatic Works Training on the T’s. ...
2011-08-08
896 reads
SQL Saturday in South Florida is quickly approaching in just 2 short weeks. As usual, if you are in the...
2011-08-03
642 reads
Oh no you, you got the Could not load type ‘Microsoft.AnalysisServices.SharePoint.Integration.ReportGalleryView’ error!!! What to do now? Why did you get...
2011-08-02
1,049 reads
SQL Saturday #85 is quickly approaching. It will be held in sunny Orlando, FL so if you live in the...
2011-07-30
2,048 reads
One of the most annoying processes with SharePoint is backing up a site collection. There is a build in tool...
2011-07-13
1,789 reads
It has been a few weeks since I last posted. I know, I’m a slacker, thanks for pointing that out. ...
2011-07-10
385 reads
By Steve Jones
I love Chicago. I went to visit three times in 2023: a Redgate event,...
By Brian Kelley
I have found that non-functional requirements (NFRs) can be hard to define for a...
By Kevin3NF
Can we normalize a couple of things? 1 – Trade Schools. Back in the...
Testing with AG on Linux with Cluster=NONE. it was all going ok and as...
Hi, I have two tables: one for headers with 9 fields and another for...
We're trying to understand how quick new versions of SQL server can be. Obviously...
Let’s consider the following script that can be executed without any error on both SQL Sever and PostgreSQL. We define the table t1 in which we insert three records:
create table t1 (id int primary key, city varchar(50)); insert into t1 values (1, 'Rome'), (2, 'New York'), (3, NULL);If we execute the following query, how will the records be sorted in both environments?
select city from t1 order by city;See possible answers