[Note from Pinal]: In this episode of the Notes from the Field series database expert Mike Lawell talks about his thoughts and observation about SQL Server 2016 and enhancements with AlwaysOn Availability Groups. When AlwaysOn was newly introduced, I was not able to catch up with the feature. I just thought it was just one of the subject which will not be developed by Microsoft, however, as the new versions of the SQL Server are now taking this feature to the next level, I am very delighted that I should have not worried at all. Let us see what Mike says in his own words about Enhancements with AlwaysOn Availability Groups.
Team Database Development and Version Control with SQL Source Control
Team database development is hard. It throws up questions about who’s responsible for code, how to track changes, and how to share them. For application development, teams can overcome these problems with version control. Databases are different.
MySQL – LEAST and GREATEST Comparison Operators
The biggest challenge which we often face as a database person is to compare the value across multiple columns. Trust me, if there were no comparison operators, we would have never got this task done. MySQL supports many comparison operators like BETWEEN, IN, etc. LEAST and GREATEST is very handy if you want to compare values across many columns.
SQL SERVER – Unable to Open Maintenance Plan in Management Studio
The most queried topics in this blog have been around troubleshooting or which solve specific error messages. I always feel when I see something new as messages, I try to check if this is available here using the search page. If these are not there, then I go about documenting what were the steps I took to actually solve the given problem. Once I successfully solve the problem about Unable to Open Maintenance Plan in Management Studio. I go about documenting the same back into as a blog post so that I will be able to find the same in future reference.
SELECT One by Two – Why Does SELECT 1/2 Returns 0 – Interview Question of the Week #067
Just like a week, during a user group meeting I was told to ask questions about why the SELECT 1 /2 gives a different answer then one user is expected. Let us see this question in detail about SELECT One by Two as it can be a great learning for many new beginners.
SQL SERVER – Identifying Page Types
I try to keep the understanding and concepts for learning simple. Because for a strong building one needs to have a solid foundation. The structure’s stability is a function of how well the foundation holds them. Just having a beautiful exterior will not be sufficient. So getting into complex design issues or internals sometimes is not of any use if you didn’t get the basics right. Let us learn about Identifying Page Types in SQL.
MySQL – FOUND_ROWS() Function for Total Number of Rows Affected
In SQL Server to get the total number of rows affected by the last statement, you can use the system variable @@ROWCOUNT. Similarly, in MySQL you can find it using FOUND_ROWS () function.
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