I love my job because I get to help people learn new technology as well as help them clear their confusion about the older technology. Recently during SQL Server Performance Tuning Practical Workshop, I was asked a very simple but interesting question by an attendee about NVARCHAR column.Â
SQL SERVER – How to Count a Particular Value Across All Columns?
This question came up in the recent SQL Server Performance Tuning Practical Workshop. During the workshop, I have answer questions of users during lunch break. One of the users had a very interesting scenario where he had to change one of their employee’s email address for technical reasons but before he changes that he needed to count in every single place where the email exists. I have simulated the same situation in this blog post and we will see how we can count a particular value across all the columns of the table.
SQL SERVER – Cluster Install Failure – Code 0x84cf0003 – Updating Permission Setting for Folder Failed
There are various issues which I have seen SQL installation and most of the time they are intuitive. The error message is mostly helpful and provides the right direction. In this blog we would discuss error Updating permission setting for folder failed:
SQL Server – Find Distinct Result Sets Using EXCEPT Operator
In my earlier post on “SQL SERVER – Remove Duplicate Rows Using UNION Operator”, I showed a different method of removing duplicate rows from the result set using a UNION operator. Here is another similar method using EXCEPT operator to find distinct results.Â
SQL Authority News – Free Performance Tuning Videos
SQL Server Performance Tuning and Optimization is how I earn my bread at home. Lots of people often ask if I will be happy to teach them my SQL Server Performance tuning tricks and my answer is very simple – of course. I am always willing to help people learn about SQL Server Performance Tuning if they are willing to learn about the subject. I have created some Free Performance Tuning Videos.
SQL SERVER – Performing IF…THEN In T-SQL With IIF Expression
Today, we are going to see one of the most underutilized features of SQL Server IIF. In SQL Server we can performance IF…THEN logic in T-SQL with IIF Expression but I hardly see it being used at most of the organization.
How to Track Autogrowth of Any Database? – Interview Question of the Week #205
Question: How to Track Autogrowth of Any Database?
SQL SERVER – T-SQL Script to Check SQL Server Job History
Yesterday my long time customer from New Zealand asked me during our regular weekly meet of Comprehensive Database Performance Health Check if I know a T-SQL Script to Check SQL Server Job History.
SQL SERVER – How to Write Correlated Subquery?
This is a follow-up blog post to my earlier blog post written about SQL SERVER – Writing Your First Subquery From a Single Table. In the blog post, we discuss how to write a correlated subquery and why it is actually necessary. In a query, a correlated subquery is a subquery that uses values from the outer query. Subqueries are usually running once for each row processed for outer query and that is why they are often inefficient as well.
SQL SERVER – Writing Your First Subquery From a Single Table
My primary responsibility is to help different organizations with tuning their SQL Server Performance and here is the link to my most popular service SQL Server Performance Health Check. I often encounter complicated performance problems which are not easy to resolve, however, recently during the lunch break, I was asked by Junior developer a question about writing a subquery from a single table by a Junior DBA at the organizations.