Functions

Rajendra Gupta
SQL Server 2019 columnstore index execution plan

Columnstore Index Enhancements in SQL Server 2019 – Part 1

November 9, 2018 by

SQL Server was launched in 1993 on WinNT and it completed its 25-year anniversary recently. SQL Server has come a long way since its first release. At the same time, Microsoft announced a preview version of SQL Server 2019. SQL Server 2019 provides the ability to extend its support to big data, Apache Spark, Hadoop distributed file system (HDFS) and provides enhancements to database performance, security, new features, and enhancements to SQL Server on Linux.

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Prashanth Jayaram

SQL date format Overview; DateDiff SQL function, DateAdd SQL function and more

October 31, 2018 by

SQL date format functions like the DateDiff SQL function and DateAdd SQL Function are oft used by DBAs but many of us never took the time to fully understand these extremely useful features. For professionals just getting started with SQL Server, these functions are some of the first to become familiar with. So hopefully this article will have a little something for everyone across the skill spectrum

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Rajendra Gupta
Execute DMV query sys.dm_db_database_page_allocations to get page details

SQL Server 2019 – New DMF sys.dm_db_page_info

October 22, 2018 by

Microsoft released preview of SQL Server 2019 recently in Ignite 2018. With every release of SQL Server is enriched with new dynamic management view and functions along with enhancements to existing features.

In this article, we will view the newly introduced dynamic management function (DMF) sys.dm_db_page_info and explore the different scenarios around it.

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Prashanth Jayaram

SQL string functions for Data Munging (Wrangling)

September 13, 2018 by

In this article, you’ll learn the tips for getting started using SQL string functions for data munging with SQL Server. In many cases, Machine learning outcomes are only as good as the data they’re built on – but the work of preparing data for analytics (that is, data wrangling) can eat up as much as 80% of your project efforts. 

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Ben Richardson

Understanding SQL Server’s TRY_PARSE and TRY_CONVERT functions

May 16, 2018 by

Data conversion is one of the most fundamental tasks of any programming language. Data received from different sources is often not in the right format. For example, if you receive an XML file where age is in the string format and you want to calculate an average age for the people in the file you will need to convert age into an integer.

To make the conversion process simple, the TRY_PARSE and TRY_CONVERT functions were introduced in SQL Server 2012. Before TRY_PARSE and TRY_CONVERT, SQL Server only had the PARSE and CONVERT functions.

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Sifiso W. Ndlovu

ETL optimization using SQL Server TRY Functions

October 24, 2017 by

Introduction

An enterprise data warehouse ETL solution typically includes, amongst other steps, a data transformation step that converts source data from one data type into another. It is during this step that type conversion errors may occur and depending on the type of exception handling techniques implemented in the ETL solution (or lack thereof), frustration may occur for both ETL developers and DBAs when trying to identify and resolve type conversion errors. In this article we take a look at a trio of SQL Server built-in functions that were introduced in SQL Server 2012, namely, TRY_PARSE, TRY_CAST, and TRY_CONVERT and how they could be utilized to reduce type conversion errors in ETL solutions and thereby saving developers needless troubleshooting exercise.

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Ben Richardson
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How to use SQL Server built-in functions and create user-defined scalar functions

July 7, 2017 by

A function is a set of SQL statements that perform a specific task. Functions foster code reusability. If you have to repeatedly write large SQL scripts to perform the same task, you can create a function that performs that task. Next time instead of rewriting the SQL, you can simply call that function. A function accepts inputs in the form of parameters and returns a value. SQL Server comes with a set of built-in functions that perform a variety of tasks.

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Gerald Britton

How to track SQL Server database space usage with built-in functions and DMVs

June 12, 2017 by

Introduction

In the previous article in this series on dynamic management views in SQL Server, we used DMV’s to discover some basic information about databases on an instance you are connected to, along with some ideas about getting basic file system and security info. I promised to dive into security next but first I’d like to explore a topic that is currently quite critical for the company I work for today: tracking space usage.

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Prashanth Jayaram

Top SQL string functions in SQL Server 2017

June 8, 2017 by

SQL Server 2017 has been in the talk for its many features that simplify a developer’s life. With the previous versions, developers had to write T-SQL, or user-defined functions using temporary tables, and build complex logic, just for string manipulation. In almost every database I work with, I see many user-defined functions for string manipulation and string aggregation.

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