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Apr18

SQL Server Interview Questions and Answers Part 4

Pinal Dave
SQL Interview Questions and Answers
DBA, SQL Download, SQL Function, SQL Joins, SQL Scripts, SQL Server, SQL Trigger
15 Comments

Interview Questions and Answers Part 4 begins with SQL Profiler: what it is, how it captures events to a file or table, and how to keep traces small.

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Apr17

SQL Server Interview Questions and Answers Part 3

Pinal Dave
SQL Interview Questions and Answers
Database, Software Development, SQL Constraint and Keys, SQL Cursor, SQL Download, SQL Function, SQL Index, SQL Joins, SQL Scripts, SQL Server, SQL Server Security, SQL Stored Procedure, SQL Sub Query, SQL Trigger
42 Comments

Interview Questions and Answers Part 3 opens with NOLOCK: how the hint skips read locks, why that means dirty reads, and what it does for concurrency.

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Apr16

SQL Server Interview Questions and Answers Part 2

Pinal Dave
SQL Interview Questions and Answers
Database, Software Development, SQL Collation, SQL Constraint and Keys, SQL Cursor, SQL Download, SQL Index, SQL Joins, SQL Scripts, SQL Server, SQL Server DBCC, SQL Server Security, SQL Trigger
53 Comments

Interview Questions and Answers Part 2 explains clustered vs non-clustered indexes and the index configurations a table can have. The updated set has moved.

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Apr15

SQL Server Interview Questions and Answers Part 1

Pinal Dave
SQL Interview Questions and Answers
Software Development, SQL Cursor, SQL Download, SQL Index, SQL Joins, SQL Scripts, SQL Server, SQL Server Security, SQL Stored Procedure, SQL Trigger
73 Comments

Interview Questions and Answers Part 1 starts with the basics: what an RDBMS is and what normalization means. The updated set now lives at a new location.

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Apr15

geometry STContains: Check Boundary Membership

Pinal Dave
SQL Tips and Tricks
SQL Datatype, SQL Function, SQL Scripts, SQL Server

geometry STContains differs from STIntersects at a polygon boundary. Four literal points expose the intended inclusion rule without treating ordinary language as a spatial predicate.

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Apr14

Silent Truncation When Building Strings in nvarchar(max) Variables

Pinal Dave
SQL Tips and Tricks
Best Practices, SQL Performance, SQL Server
No Comments

Silent truncation can happen while SQL Server evaluates a bounded expression. These examples compare the lost characters with a max expression and a max REPLICATE input. Check stored lengths before blaming a clipped display.

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Apr14

SQL SERVER – CASE Statement/Expression Examples and Explanation

Pinal Dave
SQL Performance
Best Practices, SQL Scripts
149 Comments

The CASE Statement/Expression works anywhere an expression can, from the SELECT list to WHERE and HAVING. Here are its two basic forms with examples.

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Pinal Dave is an SQL Server Performance Tuning Expert and independent consultant with over 24 years of hands-on experience. He holds a Masters of Science degree and numerous database certifications.

Pinal has authored 19 books and 125 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 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.


Shaivi Pinalkumar Dave is a book author and a women’s artistic gymnast.

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