SQL Server Performance on SQL Server Scripts

SQL Server Missing Indexes Report: dm_db_missing_index

Sat, 28 Feb 2026 00:00:00 +0000

SQL Server tracks index recommendations automatically as queries execute, storing them in the missing index DMVs. This T-SQL script queries those views to produce a ranked report of missing indexes, ordered by the estimated improvement they would provide, along with a ready-to-run CREATE INDEX statement for each recommendation.

Purpose and Overview

Every time SQL Server executes a query that would benefit from an index that does not exist, it records the recommendation in sys.dm_db_missing_index_details. Over time these recommendations accumulate and can reveal the highest-impact indexing changes you can make to improve query performance.

SQL Server Wait Statistics Report: dm_os_wait_stats

Fri, 27 Feb 2026 00:00:00 +0000

Wait statistics are one of the most reliable ways to identify performance bottlenecks in SQL Server. This T-SQL script queries sys.dm_os_wait_stats, filters out background and idle wait types that do not indicate real problems, and ranks the remaining waits by their percentage of total wait time.

Purpose and Overview

Every time SQL Server cannot immediately process a request — because it is waiting for CPU, disk, memory, locks, or network — it records that wait in sys.dm_os_wait_stats. Over time this DMV accumulates a comprehensive picture of where SQL Server spends time waiting.

SQL Server UPDATE STATISTICS and SELECT Dynamic Scripts

Wed, 06 Aug 2025 00:00:00 +0000

SQL Server Dynamic Update Statistics and Select Scripts for Database Maintenance

Purpose

These SQL Server scripts are designed to automatically generate database maintenance commands by dynamically creating UPDATE STATISTICS statements and SELECT queries for all user tables in a database. This approach is particularly useful for database administrators who need to perform bulk operations across multiple tables without manually writing individual commands for each table.