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What Is Locking and Blocking in SQL Server?

April 6, 2010
Pinal Dave
SQL Performance
Best Practices, Database, SQL Performance, SQL Server

Locking and blocking are not the same thing, and the difference is the whole subject. I blocked a session on purpose and read it from the DMVs. Why short blocking is healthy, and why NOLOCK fixes nothing.

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Size of disk.

SQL SERVER – 2008 – Introduction to Snapshot Database – Restore From Snapshot

April 5, 2010
Pinal Dave
SQL Tips and Tricks
SQL Backup and Restore, SQL Data Storage

A Snapshot database is a read-only, static view of a source database. I explain how it works and how to restore a database from a snapshot.

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SQL SERVER - Enable Identity Insert - Import Expert Wizard

SQL SERVER – Enable Identity Insert – Import Expert Wizard

April 4, 2010
Pinal Dave
SQL Tips and Tricks
SQL Identity, SQL Server, SQL Utility

An SSIS package failed with an identity error because both tables had identity columns. Checking Enable identity insert in the Import Expert Wizard fixed it.

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SQL SERVER - Difference Between GRANT and WITH GRANT

SQL SERVER – Difference Between GRANT and WITH GRANT OPTION

April 3, 2010
Pinal Dave
SQL Tips and Tricks
SQL Scripts, SQL Server Security

What is the difference between GRANT and WITH GRANT? Only WITH GRANT OPTION lets a user pass the same permission on to other users.

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Gouache painting: on a joiner's bench, a stout beam end has one dovetail-shaped socket

ISJSON Type Constraints: Validate the Top-Level Value

April 2, 2010
Pinal Dave
SQL Tips and Tricks
SQL Datatype, SQL Function, SQL Scripts

ISJSON type constraints distinguish JSON shapes. Compare VALUE and SCALAR, Boolean literals, JSON null and SQL NULL on SQL Server 2022.

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float vs decimal: Why Money Should Never Be float

April 1, 2010
Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Datatype, SQL Server

Compare float vs decimal for currency, inspect approximate arithmetic, and use explicit decimal precision and rounding rules.

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fun quotes

SQLAuthority News – Fun Quotes about Technology

March 31, 2010
Pinal Dave
Personal
SQL Humor, SQL Server

SQL Server can be a boring subject at times, so here are some fun quotes about technology from Thomas Edison, Douglas Adams and others to lighten the day.

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