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.
SQL Server Interview Questions and Answers Part 1
Interview Questions and Answers Part 1 starts with the basics: what an RDBMS is and what normalization means. The updated set now lives at a new location.
geometry STContains: Check Boundary Membership
geometry STContains differs from STIntersects at a polygon boundary. Four literal points expose the intended inclusion rule without treating ordinary language as a spatial predicate.
Silent Truncation When Building Strings in nvarchar(max) Variables
Silent truncation can happen while SQL Server evaluates a bounded expression. These examples compare the lost characters with a max expression and a max REPLICATE input. Check stored lengths before blaming a clipped display.
Low Memory Signals in the Resource Monitor Ring Buffer
Read the resource monitor ring buffer alongside Windows and process memory signals to investigate cache shrinkage in SQL Server.
SQL SERVER – Search Text Field – CHARINDEX vs PATINDEX
CHARINDEX and PATINDEX both return the start position of a pattern in a text field. PATINDEX allows wildcards, CHARINDEX does not. Examples use AdventureWorks.