Prashanth Jayaram

SQL Join overview and tutorial

September 17, 2018 by

The ability to combine results from related rows from multiple tables is an important part of relational database system design. In SQL Server, this is accomplished with the SQL join clause.  It’s the nature of traditional relational database systems where some table contains information related to other tables with a common key value. Using a SQL join, you can easily perform queries on related data-sets from multiple tables with these shared keys.

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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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Sifiso W. Ndlovu

ETL optimization using SQL Server TRY Functions

October 24, 2017 by


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

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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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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Ahmad Yaseen

Compression and decompression functions in SQL Server 2016

June 2, 2017 by

The concept of data compression is not a new on for SQL Server Database Administrators , as it is was introduced the first time in SQL Server 2008. In that SQL Server version, you were able to configure the compression at the row and page levels on the table, index, indexed view or the partition. The row and page level compression is not the best choice in all cases, as it does not work well on the Binary Large Objects (BLOB) datatypes, such as the videos, images and text documents.

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Eli Leiba

Construct a special multi-statement table function for checking SQL Server’s health

December 24, 2015 by

The Problem

Checking the many SQL Servers health conditions is one of the DBA basic tasks. Monitoring many servers and databases, day after day can be a very tedious job. There are many aspects to look for when checking the server performance figures. Such aspects include among others: CPU, Read and Write Disk counters, Various memory counters and locks performance counters. The DBA needs a tool that checks the most important counters and output a report that states whether the server is considered to be healthy or not. For every aspect, a counter is chosen to represent it to be included in the overall report.

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