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Dec15

Why Execution Plan Operator Read More Rows Than Available? – Interview Question of the Week #255

Pinal Dave
SQL Interview Questions and Answers
Execution Plan, SQL Performance, SQL Scripts, SQL Server
No Comments

Question: Why Execution Plan Operator Read More Rows Than Available?

Answer: Statistics.

Now let us learn detailed answer in this blog post.

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Dec14

SQL SERVER – Query Without Join Showing Query Plan With Join

Pinal Dave
SQL Performance
Execution Plan, Query Hint, SQL Joins, SQL Scripts, SQL Server
1 Comment

This question often keeps on coming in my consulting engagements. Let us quickly see the answer about Query Without Join Showing Query Plan With Join.

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Dec13

SQL SERVER – Persisting Sample Percentage for Statistics – PERSIST_SAMPLE_PERCENT

Pinal Dave
SQL Performance
SQL Scripts, SQL Server, SQL Statistics
1 Comment

Recently I got the opportunity to work on a very new feature of Persisting Sample Percentage for Statistics. Let us learn today.

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Dec12

SQL SERVER – List All the Nullable Columns in Database

Pinal Dave
SQL Performance
SQL Column, SQL DMV, SQL NULL, SQL Scripts, SQL Server
4 Comments

Recently during the consulting engagement, I needed to create a query that Lists All the Nullable Columns in Database, which I am sharing.

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Dec11

SQL SERVER – APPROX_COUNT_DISTINCT – Not Always Efficient

Pinal Dave
SQL Performance
SQL Counter, SQL Function, SQL Scripts, SQL Server, SQL Server 2019
No Comments

After a lot of testing, I figured out that the newly introduced function is not always efficient. A newly-introduced function APPROX_COUNT_DISTINCT.

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Dec10

SQL SERVER – List Number Queries Waiting for Memory Grant Pending

Pinal Dave
SQL Tips and Tricks
Memory Grant, SQL Memory, SQL Scripts, SQL Server
No Comments

Today, in this blog post let us see how we can List Number Queries Waiting for Memory Grant Pending. I had built this simple query for the client.

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Dec9

SQL SERVER – Row Mode and Memory Grant Feedback

Pinal Dave
SQL Performance
Memory Grant, SQL Memory, SQL Scripts, SQL Server
No Comments

One of the questions, which really caught my attention did this feature work with Row Mode like it does with Batch Mode. Let us discuss today.

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SQL SERVER – Generate A Single Random Number for Range of Rows of Any Table – Very interesting Question from Reader

SQLAuthority News – Microsoft Certification Exam – Discount Code – Free Second Chance – MCTS, MCITP, MCPD

SQL SERVER – 2008 – 2005 – Rebuild Every Index of All Tables of Database – Rebuild Index with FillFactor

SQL SERVER – FIX : ERROR : Msg 5834, Level 16, State 1, Line 1 The affinity mask specified conflicts with the IO affinity mask specified. Use the override option to force this configuration

SQLAuthority News – Download Microsoft SQL Server 2008 Books Online (January 2009)

SQL SERVER – T-SQL Script for FizzBuzz Logic

SQLAuthority News – Download SQL Server 2008 System Views Poster – PDF – A Wall Poster

Previous 1 … 119 120 121 122 123 124 125 … 830 Next

Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 22 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.

Pinal has authored 14 SQL Server database books and 104 Pluralsight courses. To freely share his knowledge and help others build their expertise, Pinal has also written more than 5,800 database tech articles on his blog at https://blog.sqlauthority.com.

Pinal is an experienced and dedicated professional with a deep commitment to flawless customer service. If you need help with any SQL Server Performance Tuning Issues, please feel free to reach out at pinal@sqlauthority.com.

Pinal is also a CrossFit Level 1 Trainer (CF-L1) and CrossFit Level 2 Trainer (CF-L2).


Nupur Dave is a social media enthusiast and an independent consultant. She primarily focuses on the database domain, helping clients build short and long-term multi-channel campaigns to drive leads for their sales pipeline.


Comprehensive Database Performance Health Check

Is your SQL Server running slow and you want to speed it up without sharing server credentials? In my Comprehensive Database Performance Health Check, we can work together remotely and resolve your biggest performance troublemakers in less than 4 hours.

Once you learn my business secrets, you will fix the majority of problems in the future.


SQL Server Performance Tuning Practical Workshop

Have you ever opened any PowerPoint deck when you face SQL Server Performance Tuning emergencies? SQL Server Performance Tuning Practical Workshop is my MOST popular training with no PowerPoint presentations and 100% practical demonstrations.

Essentially I share my business secrets to optimize SQL Server performance.


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