In this video, we are going to learn; How and when to use Apply operator in SQL Server, and How to compare rows on a given logic You can download the script used in this example from below the video.
In this video, we are going to learn; Generate date list from the given date range dynamically Repeat the date list for each employee without using a loop or recursive CTE You can download the script used in this example from below the video.
Unfolding | Set Based Approach | Create Attendance Report – Episode 7 Read More »
In this video, we are going to learn; How we can Generate rows dynamically for each record of a table in set based approach, and How to do calculations on each row of a table generated dynamically You can download the script used in this example from below the video.
Unfolding | Set Based Approach | Generate Rows Dynamically – Episode 6 Read More »
In this video, we are going to understand Tally table which is very useful in writing set based SQL queries. You can download the script which can be used to create the Tally table from below the video.
Unfolding | Set Based Approach | Tally Table – Episode 5 Read More »
In this video, we are going to understand how join works internally. If you have a good understanding of joins and how it works, you can skip this video and move to the next video in this series. If not, lets start understanding the joins. You can download the script used in this example from below the video. Here
Unfolding | Set Based Approach | How join works internally – Episode 4 Read More »
In this video, we are going to understand the query execution architecture which helps us to understand the importance of set based approach. When a T-SQL statement gets submitted to SQL server, it goes through multiple steps before we get the final output. Lets have a look on SQL Server query execution architecture.
Unfolding | Set Based Approach | SQL Server Query execution architecture – Episode 3 Read More »
This video will give you insight of the topic that we are going to cover in this series. We know that the thinking in terms of sets is creative and innovative and once you start understanding the concepts, believe me, you will find it is simple too. Writing set based queries needs a good understanding
Unfolding | Set Based Approach | Introduction to the course – Episode 2 Read More »
Welcome to my course “Unfolding | Set Based Approach”. This is my first video tutorial series. In this series, I am going to share the concepts and techniques being used to create set based SQL queries. This course is not based on how to write queries (this you can find at many places), rather it is based on
Unfolding | Set Based Approach | Why set based approach – Episode 1 Read More »
In this blog post “Order max and min value rows alternatively in SQL Server”, we are going to learn how we can order the rows of a table by combining max and min value rows alternatively. For example, from an employee table based on the salary column, we need to extract the records ordered as; First row: First highest salary Second row: First lowest
Order max and min value rows alternatively in SQL Server Read More »
In this post, we are going to learn how we can get hierarchical data in order. We are dealing with a user defined hierarchical data which can have “n” number of siblings and their siblings can also have “n” number of siblings in turn. For demo purpose, we have a Product_Master table, in which a product can be marked as a parent
