Frank Solomon

Frank Solomon
Query the sys.dm_xe_objects table, and look at the rpc_completed event row.

Using SQL Server Extended Events to debug applications

July 3, 2020 by

Introduction

Often enough, multilayer software has bugs. SQL Server Extended Events system offers tools that can help find those bugs. A bug can happen in any layer – data, logic, or presentation. To fix those bugs, it helps to see the exact parameters and values that the presentation layer sends to the data layer. As a data layer product, SQL Server Extended Events can help with this.

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Lever T-SQL for Pinpoint Control of ORDER BY in a Stored Procedure

June 1, 2020 by

Introduction

The T-SQL ORDER BY clause sorts SQL Server SELECT statement result sets, and it becomes important when we build stored procedures. Unfortunately, the syntax offers no flexible way to directly control the ORDER BY clause behavior with argument values. This means we don’t have an easy way to control the specific column or columns that the ORDER BY clause sorts. Additionally, SQL Server does not offer a flexible way to directly control the ascending or descending order of any ORDER BY clause column with argument values. Of course, we can certainly hard-code the ORDER BY clause in a stored procedure, but this approach becomes fixed in stone. We could try a dynamic SQL solution, involving a stored procedure code that dynamically builds and executes SQL Server statements inside a stored procedure. However, this technique becomes tricky, and it can lead to SQL injection attacks. Other techniques might rely on CASE statements, and their complexity can become overwhelming as the column count grows. This article spotlights a clean, efficient, pinpoint T-SQL stored procedure technique that directly sorts one, some, or all SELECT statement result set columns. The technique avoids dynamic SQL, and it operates directly in a stored procedure. The article also shows how to set the ascending or descending sort order of specific columns.

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Run the DYNAMIC_ROW_NUMBER_PARTITIONS stored procedure with a T-SQL EXEC statement, and see the result set.

Lever T-SQL to dynamically define duplicate SQL Server database table rows

May 11, 2020 by

Introduction

Lever T-SQL to handle duplicate rows in SQL Server database tables article highlighted T-SQL features that detect and handle duplicate SQL Server table rows. The techniques work well, but they rely on fixed duplicate row definitions. This article extends those techniques, showing how to define duplicate rows in a dynamic way.

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Setting the target Directory

How to update the T-SQL Toolbox database

April 6, 2020 by

Introduction

In an earlier article, Solve Time Zone, GMT, and UTC problems using the T-SQL Toolbox database, I described T-SQL Toolbox, a free, open-source SQL Server database that handles time zone, date, and time calculations in a clean and efficient way. Available here at the CodePlex Archive, and here at GitLab, T-SQL Toolbox relies on time zone and time zone adjustment data in its two tables for many of its own calculations. However, T-SQL Toolbox does not update that data. I built primitive C-Sharp and VB.net applications that extract the latest time zone and time zone adjustment data from the Windows registry, and I discussed those applications in that earlier SQL Shack article. In the article, I explained that we can build SQL Server UPDATE statements with this extracted data, and then update the T-SQL Toolbox tables. This article describes a better approach and a better solution.

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