SQL Server 2022 introduces Parameter Sensitive Plan Optimization (PSPO), a feature that revolutionizes the performance of parameterized queries.
PSPO Plan Variants: One Query, Several Plans in SQL Server
PSPO plan variants let SQL Server cache up to three plans for one parameterized query when the data is very skewed. This post builds a skewed table, shows two variants with different reads for three calls, compares the same calls with the feature off, and explains when PSPO does not apply.
Data Quality Asserts in T-SQL: Failing a Load When Rules Break
Write data quality asserts in T-SQL to reject invalid staging rows, preserve check results, and record each load attempt.
Chatty Applications: Finding Many Tiny Queries per Second
Diagnose chatty applications with batch rates, cached executions, bounded session event counts, and measured round trips per user action.
Column-Level Permissions: Hiding One Column From Some Users
Apply SQL Server column-level permissions, test DENY and SELECT behavior, inspect explicit grants, and compare views with data masking.
Cross-Database Ownership Chaining: Why It Is Off and What to Use
Understand cross-database ownership chaining, inspect its scope, and use signed procedures for narrow access between SQL Server databases.
Finding Oversized Data Files With Lots of Free Space
Identify oversized data files with FILEPROPERTY, separate internal free space from disk capacity, and review one-time shrink choices.