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Identity Column Quiz: Why Did My IDs Skip a Number?

January 4, 2012
Pinal Dave
SQL Puzzle
SQL Constraint and Keys, SQL Identity, SQL Table Operation, SQL Transactions

This Identity Column Quiz starts with three rows and one rolled-back insert, then asks what ID the next row gets. The answer is 5, not 4. A tested script proves it and shows two more ways numbers go missing.

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SET NOEXEC and PARSEONLY: Checking a Script Without Running It

January 4, 2012
Pinal Dave
SQL Tips and Tricks
SQL Coding Standards, SQL Dependency, SQL Server, SQL Stored Procedure

Use PARSEONLY and NOEXEC to inspect scripts without executing them, understand deferred references, and check existing module dependencies.

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Types of Triggers Quiz: Which Trigger Can Fire on a View?

January 3, 2012
Pinal Dave
SQL Puzzle
SQL Error Messages, SQL Table Operation, SQL Trigger, SQL View

This Types of Triggers Quiz asks which trigger you can put on a view that joins two tables. The answer is INSTEAD OF INSERT. A tested script shows the error an AFTER trigger gives and how the working trigger splits one insert into two tables.

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ANSI Isolation Levels Quiz: Which Level Lets You Read Uncommitted Data?

January 2, 2012
Pinal Dave
SQL Puzzle
Snapshot, SQL Lock, SQL Transactions, Transaction Isolation

This ANSI Isolation Levels Quiz asks which level lets one session read a price that another session has not committed. A two-window test on SQL Server 2025 shows what each level returns. It also shows how READ COMMITTED SNAPSHOT removes the wait.

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Interview

SQL SERVER – Interview Questions and Answers – Perspectives of an Author

January 1, 2012
Pinal Dave
SQL Interview Questions and Answers
SQL Server

Today is the first day of year 2012 – Happy New Year!. This blog post is written by my co-author of SQL Server Interview Questions.

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Give It Away: Why Sharing What You Know Makes You Better

December 31, 2011
Pinal Dave
Personal
Blogging, Career Advice, SQL Training

Sharing what you know does not empty you. Like a village well, knowledge fills faster the more people draw from it. A year of publishing every day taught me why giving it away makes the giver better.

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SQLAuthority News – A Quick History of Writing Three Books in Year 2011

December 30, 2011
Pinal Dave
Personal
SQLAuthority Book Review

A quick history of writing three books in 2011, and a look at everything I write every day, from 400 emails to blog posts.

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