In this article, we’ll walk-through the SQL Pivot and SQL Unpivot operators and how they can be useful to transpose SQL Server data. Also, we’ll discuss both static and dynamic ways to use PIVOT and UNPIVOT relational operators that can be used to transform aggregated distinct values as column(s) in the result-set by specifying all the column values in the PIVOT IN clause.
SQL Server pivot Introduction
There are several ways to transpose a dataset from rows to columns and columns to rows. SQL Pivot is one of the techniques that allows transposing of rows to columns and performs possible aggregations along the way. SQL PIVOT and SQL UNPIVOT relational operators transpose a table-valued two-dimensional data into another form of data. SQL PIVOT transposes a table-valued expression from a unique set of values from one column into multiple columns in the output and performs aggregations. SQL UNPIVOT performs the opposite operation of SQL PIVOT by transforming the columns of a table-valued expression into column values.
SQL Pivot and Unpivot
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.
The aim of this article is to provide you with the basic knowledge and examples that you will need to use the SQL join effectively in any database environment.
The requirement of data refactoring is very common and vital in data mining operations. In the previous article, you’ll learn the tips for getting started with SQL string functions, including the SQL substring function for data munging with SQL Server. As we all agree that the data stored in one form sometimes require a transformation, we’ll take a look at some common functions or tasks for changing the case of a string, converting a value into a different type, trimming a value, and replacing a particular string in a field and so on.
After reading this article, you’ll understand more about:
- SQL String functions
- Understand the SQL Server SUBSTRING function
- How to handle data using the SUBSTRING SQL function
- How to use the SQL Server SUBSTRING function in the where clause
- How to dynamically locate the starting and end character position in the SQL Server SUBSTRING function
- How to work with date-time string using the SQL Server SUBSTRING function
- How to Create a simple sub-select using the T-SQL SUBSTRING function
- And more…
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.
In this guide, we’ll see the following topics:
- What is the data munging?
- How you can reduce your data preparation time
- How to easily get started with SQL string functions
- How to process data using SQL string functions
- And more…
We’ll look at specific SQL string function examples including
- SQL concatenate string
- SQL Server substring functions
- SQL string functions
- SQL Server convert string to date
- SQL replace string
- SQL convert INT to String
- SQL convert String to DateTime
- SQL string comparison
- And more …
This article is an effort to showcase the available SQL string functions to manipulate the raw data to make it more meaningful data-set for the data scientist to perform the data analysis using SQL Server.
This article is part of the SQL Server Tools series, aimed at giving you an idea of the available tools and techniques to build applications using SQL Server tools. The first article of the series covers the rudimentary DevOps concepts and discusses on a high level, the overview of SQL Server tools that can be piped for DevOps operations.
In this article, I will explore various SQL tools. I will be discussing in detail about each of the following tools in the upcoming articles:
- SQL Operations Studio
Continue reading …
Getting started with SQL Server Tools
Microsoft has provided a platform and tools to manage modern data applications. The focus of this series is to help the DBAs to give the glimpse of currently available SQL Server DevOps tools.
- Sqlcmd – Overview of SQLCMD utility in SQL Server
- BCP – BCP (Bulk Copy Program) in Action
- SqlPackage – Continuous Deployment using SQL Server Tools SqlPackage.exe
- MSSQL-Scripter – SQL Server cross-platform MSSQL-Scripter scripting Tool
- SQL Operations Studio – Getting started with SQL Operations Studio (SOS)
SQL Server 2017 is considered a major release in the history of the SQL Server life cycle for various reasons. From my personal point of view, SQL Server 2017 is indeed an interesting release. After writing a lot about it and testing various features of SQL Server 2017, I’d like to walk you through some of its interesting features.
SQL Server 2017 …
- is now on the platform of our choice; SQL Server 2017 on several Linux distros, that can run on Docker containers, and SQL VM in Azure, along with the good ol’ SQL Server on Windows.
- expands its reach to support Graph database technology
- includes automatic database tuning
- supports Machine Learning by adopting Python
- contains new dynamic management views and functions
- has new string functions
- And more…
Continue reading ..SQL Server 2017 Top Features
It’s a time to turn the corner from “DBA” to “DBA specialist”. This in-depth guide explores the importance of database backup-and-restore features and skills you’ll need to build good backup-and-restore strategies using the available tools and techniques. Along the way, you’ll pick up some interesting insights and most of the concepts of database backup and restore procedures.
As you move through the list of 20+ articles, you’ll see most of the features that include various database Backup-and-Restore concepts, T-SQL programming techniques, PowerShell Scripting, implementation of backup solutions to Docker containers, data management using SQL Ops Studio, handling bacpac and dacpac files, ingress and egress data from Cloud and more. The articles are organized to make specific topics easy to find so that you can jump start depending on your skill level.