#t-sql

Articles tagged with #t-sql

UNION vs. UNION ALL: How Hidden Sort Operators Slow Down Your Combined Datasets
Unmasking the duplicate check penalty: Why combining queries can trigger unexpected disk grinding, how to trace performance plan warnings, and when to drop the distinct filter safely.
Jul 2, 20267 min read
Hidden CPU Burn: How Scalar User-Defined Functions Trap Your Queries in RBAR Loops
Unwrapping row-by-row bottlenecks: Why modular code kills database performance, how to track hidden UDF execution penalties, and how to convert functions into high-speed inline expressions.
Jul 1, 20266 min read1
The Local Variable Trick: How to Stabilize Stored Procedures and Bypass Parameter Sniffing
Tuning execution plans at the code level: Why hiding parameter values from the query optimizer stops performance spikes and creates rock-solid query consistency.
Jun 30, 20267 min read2
SQL Server Deadlocks: How to Track Down Error 1205 and Stop Query Collisions
Breaking the ultimate database gridlock: Why transactions violently collide, how to extract hidden XML deadlock graphs, and how to rewrite code patterns to eliminate victim states.
Jun 27, 20267 min read4
Non-SARGable Queries: How Function-Wrapped Columns Force Full Table Scans
Unwrapping your indexes: Why passing database columns into functions kills search speeds, how to write SARGable code, and how to keep lookups lightning fast.
Jun 26, 20266 min read
SQL Server JSON Performance: How to Fix Slow JSON Queries and Index Dynamic Data Safely
Tuning the schema-less engine: Why querying JSON data fields causes massive CPU text-grinding, how to parse payloads efficiently, and how to build precise virtual indexes.
Jun 23, 20266 min read1

#t-sql - Tuned Instance