NULL in SQL Server is not zero and not an empty string. It means the value is unknown, and that changes every comparison you write. Why equals never matches, the NOT IN trap that returns nothing, and where NULL is allowed to live.
SQL SERVER – 2005/2000 Examples and Explanation for GOTO
How the GOTO statement jumps to a label in the same T-SQL batch. My explanation for GOTO covers the syntax, the rules and when I still use it.
SQL SERVER – Raid Configuration – RAID 10
Which RAID do I use for my SQL Servers? RAID 10. It gives great read and write performance, while RAID 5 pays a write penalty for parity.
SQL Server Interview Questions and Answers Complete List Download
The SQL Server Interview Questions and Answers Complete List Download collects my six part series in one PDF, as many readers asked.
SQL Server Interview Questions and Answers Part 6
Interview Questions and Answers Part 6 covers the six properties of relational tables and de-normalization, adding redundant data to help performance.
SQL Server Interview Questions and Answers Part 3
Interview Questions and Answers Part 3 opens with NOLOCK: how the hint skips read locks, why that means dirty reads, and what it does for concurrency.
SQL Server Interview Questions and Answers Part 2
Interview Questions and Answers Part 2 explains clustered vs non-clustered indexes and the index configurations a table can have. The updated set has moved.