A data type decides what a column holds, what it costs in bytes, and how SQL Server compares it. Why NVARCHAR doubles your storage, why float will not compare cleanly, and the conversion that quietly kills an index.
Every Deployment Script Needs a Tested Undo Script
Write and test an undo script before deployment, preserve old module text and changed rows, and identify changes that require recovery.
Which SQL Server Edition Do You Need?
Which SQL Server edition do you need? Express, Developer, Standard and Enterprise compared in plain terms, plus the licensing trap where a free Developer Edition quietly ends up running the business.
When In-Memory OLTP Helps and When It Does Not
Learn when In-Memory OLTP can reduce transaction contention, which limitations still matter, and what to measure before changing tables.
What the Cardinality Estimator Does and When It Is Wrong
Understand how the cardinality estimator predicts rows, why estimates go wrong, and which statistics and plan checks help you investigate.
Building a SQL Server Home Lab That Costs Nothing
Build a SQL Server home lab with free Developer software, sample data, and a repeatable backup and restore routine on your Windows computer.
SET XACT_ABORT ON: Stopping Timeouts From Leaving Open Transactions
Use SET XACT_ABORT ON to prevent client timeouts from leaving transactions and locks open, with TRY CATCH and a sleeping-session query.