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What is Read Ahead Read in SQL Server? – Interview Question of the Week #197

October 28, 2018
Pinal Dave
SQL Interview Questions and Answers
Execution Plan, SQL Memory, SQL Performance, SQL Scripts, SQL Server

Question: What is Read Ahead Read in SQL Server?

Answer: This is SQL Server’s feature which brings data pages into the buffer cache.

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Do Index Reorganization Update Statistics? – Interview Question of the Week #196

October 21, 2018
Pinal Dave
SQL Interview Questions and Answers
Maintenance Plan, SQL Index, SQL Performance, SQL Scripts, SQL Server, SQL Statistics

Question: Do Index Reorganization Update Statistics?

Answer: No. Index Reorganization does not update Statistics of your database.

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First Queries to Run on an Unfamiliar SQL Server

October 2, 2018
Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Performance, SQL Server

Inspect an unfamiliar SQL Server with read-only queries for version, uptime, database size, waits, backup history, and settings.

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Checking Optional Features Installed on an Instance From T-SQL

September 29, 2018
Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Performance, SQL Server

A 1 in SERVERPROPERTY does not mean the feature runs. Here is how I line up the flag, the setting and the service in one query.

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Asynchronous Statistics Updates: When They Help and When They Hurt

September 27, 2018
Pinal Dave
SQL Performance
Execution Plan, SQL Performance, SQL Server, SQL Statistics

Evaluate asynchronous statistics updates against compile latency, data-change timing, and low-priority metadata locking in SQL Server.

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Intelligent Query Processing: Checking What Is On per Database

September 25, 2018
Pinal Dave
SQL Performance
Compatibility Level, SQL Performance, SQL Server, SQL Server 2019

Check intelligent query processing by database compatibility level, scoped switches, and actual plan evidence before comparing servers.

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Inline Table-Valued Functions: Parameterized Views That Stay Fast

September 22, 2018
Pinal Dave
SQL Performance
Execution Plan, SQL Function, SQL Performance, SQL Server, SQL View

Compare inline table-valued functions with scalar functions, preserve customer results, and inspect plans before claiming performance gains.

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