Does the order of join in a query change the result? With AdventureWorks, I show two queries that return the same rows, only in a different order.
SQL SERVER – SQL SERVER – Simple Example of Recursive CTE – Part 2 – MAXRECURSION – Prevent CTE Infinite Loop
Can you stop a recursive CTE from running forever? Yes. Use the MAXRECURSION option to limit it, and see what happens when the limit is too low.
SQL SERVER – Simple Example of Recursive CTE
A simple example of Recursive CTE in SQL Server, using AdventureWorks to walk the hierarchy of managers and employees, with each part explained.
SQL SERVER – PIVOT and UNPIVOT Table Examples
If you PIVOT a table and then UNPIVOT it, do you get the original back? Not always. My PIVOT and UNPIVOT table examples show why aggregation loses data.
SQL SERVER – Order Of Column In Index
Adding more columns does not make an index better. The order of column in index matters most, since an index is used only when its first column is in the query.
SQL SERVER – Converting Subqueries to Joins
Developers often write subqueries where Joins would do, or the other way around. A short note on converting between the two, with links to my earlier examples.
SQL SERVER – Join Better Performance – LEFT JOIN or NOT IN?
LEFT JOIN or NOT IN: which one gives Join Better Performance? It depends on the data. Compare the two queries and their execution plans on AdventureWorks.