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How to Convert Hex Windows Error Codes to the Meaningful Error Message – 0x80040002 and 0x80040005 and others? – Interview Question of the Week #182

July 15, 2018
Pinal Dave
SQL Interview Questions and Answers
SQL Error Messages, SQL Server, SQL Server Security

Seen hex error codes like 0x80070070 in the ERRORLOG? Here are the simple steps I use to convert hex Windows error codes into meaningful error messages.

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Execution plan size and type.

SQL SERVER – Execution Plan Ignores Tabs, Spaces and Comments

July 14, 2018
Pinal Dave
SQL Tips and Tricks
Execution Plan, SQL Scripts, SQL Server, SQL Stored Procedure

Many teams skip comments in stored procedures, fearing bigger execution plans. My demo shows SQL Server ignores tabs, spaces and comments when it builds a plan.

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Execution plan of a query with a single row and single table.

SQL SERVER – Puzzle – Why Such a Complicated Execution Plan for a Single Row, Single Table Query?

July 13, 2018
Pinal Dave
SQL Puzzle
Execution Plan, SQL Scripts, SQL Server

A simple puzzle: why does SQL Server show such a complicated execution plan for a single row, single table query on WideWorldImporters? Try to solve it.

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Several rows of clay discs waiting for the single working position of an arbor press

Serial Zones in Parallel Plans: Where One Thread Does the Work

July 12, 2018
Pinal Dave
SQL Tips and Tricks
Best Practices, Parallel, SQL Server

A parallel plan can still leave one core busy. See a harmless serial zone, a costly one, and how to read per-thread rows from the plan.

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Blind Index: Searching an Encrypted Column Without Decrypting

July 11, 2018
Pinal Dave
SQL Performance
ColumnStore Index, Computed Column, SQL Column, SQL Index

Encrypted emails cannot be searched, so store a keyed digest beside them. A hands-on demo of how it works, what it leaks and how rotation hurts.

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Title card: Event ID 7034: MSSQLSERVER Terminated Unexpectedly

SQL SERVER – Event ID:7034 – MSSQLSERVER Service Terminated Unexpectedly. It has Done this 6 time(s)

July 10, 2018
Pinal Dave
SQL Tips and Tricks
SQL Error Messages, SQL Log, Starting SQL

Recently, I came across a strange issue. I noticed that the SQL Server service terminates and restarts automatically and doesn’t restart.

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SQL SERVER - Backup to URL - Script to Generate the Create Credential and Backup Command using Access Keys

SQL SERVER – Backup to URL – Script to Generate the Create Credential and Backup Command using Access Keys

July 9, 2018
Pinal Dave
SQL Tips and Tricks
SQL Azure, SQL Backup and Restore, SQL Error Messages, SQL Scripts, SQL Server, SQL Server Security

Backup to URL can use a SAS token or access keys. Here is a script that builds the CREATE CREDENTIAL and BACKUP commands from your Azure storage access keys.

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