Justin Cooney

Web Development Tips and Examples

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I am a Senior Applications Programmer / Analyst with years of experience developing enterprise solutions using the Microsoft technology stack including C#, VB.NET, ASP.NET, AJAX, IIS and SQL Server. I specialize in Web application development with a focus on building secure systems, integrating applications, and designing robust database structures.

Category: SQL Tips

  • SQL Server: How to Query Version and Server Information

    There are three commands that can be used in SQL Server to query version information or information about the server hosting SQL Server. These commands can be run in SSMS directly, or can be used in code, for example to tailor queries for a particular database version. The commands are xp_msver, @@Version, and sp_server_info. I…

  • SQL Server: When to Use the TSQL WITH NOLOCK Hint

    MS SQL Server allows using the TSQL hint ‘WITH (NOLOCK)’ to the joins of SELECT statements. At times the WITH (NOLOCK) hint can be justified and useful, but it comes with inherent dangers that are often ignored or not understood. The WITH (NOLOCK) hint is often overused or is used when it should not be.…

  • MS SQL Server: Temporary Table and Table Variable Performance

    Temporary tables and table variables in SQL Server actually perform quite differently under different circumstances. Temporary tables are decelared as: CREATE Table #TableName ( id INT ) Table variables are declared as: DECLARE @TableName TABLE ( id INT ) Temporary tables are transaction bound whereas table variables are not. This means that if a transaction in…