NOLOCK double counting is how three people in a lunch line turn into four lunches. Nothing was inserted. One row moved ahead of the scan and got read twice. I tested it on SQL Server 2025 and share a query that catches it on your own table.
NOLOCK Can Miss Rows: The Order That Was Never Missing
Yes, NOLOCK can miss rows. A row can vanish from your report while it sits safely in the table. Nobody deleted it. The read simply walked past it.
UPDATE Without WHERE Clause: The Day Everyone Got a Raise
An UPDATE without WHERE clause changed 8,432 salaries. When ROLLBACK can help, and how to check the affected row count before COMMIT.
Function in the WHERE Clause – SQL in Sixty Seconds 201
Few even asked me to build a video on this topic. Hence, I decided to make a Function in the WHERE Clause – SQL in Sixty Seconds 201.
Parameter Sensitive Plan optimization in SQL Server 2022 – SQL in Sixty Seconds #200
SQL Server 2022 introduces Parameter Sensitive Plan Optimization (PSPO), a feature that revolutionizes the performance of parameterized queries.
Swap Columns – SQL in Sixty Seconds #199
Today we will see a quick video on how to swap columns in SQL Server. It is a widespread request. We will learn that in this video.
Find Database File Latency – SQL in Sixty Seconds #198
Lots of people asked me to create a video on my earlier blog post SQL SERVER – Script to List Database File Latency. Here is the video.