Jefferson Elias

Jefferson Elias
Latest posts by Jefferson Elias (see all)

A concrete example of migration between an Oracle Database and SQL Server using Microsoft Data Migration Assistant

April 12, 2018 by

Introduction

Intended audience

This document is intended for application developers and database administrators who plan to migrate an Oracle Database to Microsoft SQL Server.

Context

In the previous article, we saw how to install and prepare to migrate one or more Oracle Schema(s) and their objects to SQL Server. Now it’s time to go through the migration process…

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Migrating an Oracle Database to SQL Server with Microsoft Data Migration Assistant – Installation Process and Short Overview

March 27, 2018 by

Intended audience

This document is intended for application developers and database administrators who plan to migrate an Oracle Database to Microsoft SQL Server.

Context

Nowadays, most IT professionals are aware that Oracle Database is a very good database solution, but it’s not inexpensive, to say the least. If you want to partition a table in Oracle, it’s an option that you must pay for, which is the same for advanced security options like Database Encryption or Dynamic Data Masking. In contrast, SQL Server comes with these options out of the box when you use the Enterprise Edition.

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An overview of the Database Migration Assistant tool provided by Microsoft

March 16, 2018 by

This article gives the overview of the Database Migration Assistant Tool to access, plan and migrate the SQL Server from an old version.

Database migration is part of the DBA job. We can’t avoid it, and there are multiple options that can be taken:

  • From SQL Server to SQL Server
  • From another platform (Oracle Database, MySQL, PosgreSQL…) to SQL Server
  • From SQL Server to another platform (Oracle Database, MySQL, PosgreSQL…)
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How to create charts from SQL Server data using PowerShell

February 8, 2018 by

Introduction

Intended audience

This document is intended for application developers and database administrators who are willing to learn how to generate charts from data stored in Microsoft SQL Server using PowerShell.

Context

In previous article entitled Overview of PowerShell Charting capabilities we’ve seen some components of an assembly called System.Windows.Forms.DataVisualization assembly that is part of the .NET Framework and how to load it inside PowerShell.

Now, it’s time to use what we’ve learned so far.

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How to choose and check the right Database Recovery Model in accordance to your backup strategy

October 11, 2017 by

Introduction

Following best practices, we should apply principles like segregation of duties. This implies the segregation of application environments. In particular, we might see for a given application that it incorporates at least two environments: a production environment and a non-production environment that exists for testing, Q/A, training, etc

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How to drop a role in a SQL Server Database

September 6, 2017 by

Introduction

Let’s say we have a database role that we don’t need anymore because we defined another security policy using another database role. What are the steps to follow in order to properly drop this database role? That’s the question this article will try to answer, covering as many cases as possible.

In the following article, we will consider the simple steps we can follow in order to do this task using both SSMS and T-SQL. Then, we will focus on some facts that will lead us to the conclusion that, if we do it this way, it won’t work every time. We will list some situations where it could fail and define a test case situation in order to create a stored procedure that will do the job correctly, in all cases bymanaging these situations.

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Hands on Full-Text Search in SQL Server

August 25, 2017 by

Introduction

In most cases, we will use clustered and non-clustered indexes to help a query go faster, but these kinds of indexes have their own limitations and cannot be used for fast text lookup. For instance, a LIKE operator will lead SQL Server to scan the whole table in order to pick up values that meet the expression next to this operator. This means it won’t be fast in every case, even if an index is created for considered column.

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How to monitor object space growth in SQL Server

August 16, 2017 by

Introduction

There are many situations in a DBA’s life that lead him or her to monitor space growth over time in SQL Server. In short, we often want to know which tables are growing the most and how much they grow.

For that reason, it’s preferable to develop a solution that will help us in that particular task and this is exactly what this article is about. The main components will include

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How to use SQL Server Extended Events to parse Deadlock XML and generate statistical reports

June 29, 2017 by

Introduction

Context In previous article entitled “How to report on SQL Server deadlock occurrences“, we’ve seen how to extract deadlock information from either system_health or specialized Extended Event and store this information into a table in a SQL Server database. We also discussed a simple report which leads to the creation of a deadlock occurrences timeline. Read more »

T-SQL as an asset to set-based programming approach

April 27, 2017 by

Introduction

This article is the third and last one of a series of articles that aims to introduce set-based programming approach inside SQL Server, so using Transact SQL. In first article “An introduction to set-based vs procedural programming approaches in T-SQL”, we’ve compared procedural and set-based approaches and came to the conclusion that the second one can facilitate developer or DBA’s life. In second article “From mathematics to SQL Server, a fast introduction to set theory”, we’ve made the parallel between mathematical definition of set theory and its implementation in SQL Server. Now, we’ll discuss about some other features from T-SQL that can’t be left aside when considering sets.

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From mathematics to SQL Server, a fast introduction to set theory

April 25, 2017 by

Introduction

In the previous article of this series “An introduction to set-based vs procedural programming approaches in T-SQL”, we’ve seen from a simple example that we could find actual benefit from learning set-based approach when writing T-SQL code.

In this article, we will carry on in this way by having a look at what a set is and what we can do with it in a mathematical point of view and how it’s implemented and provided to us in SQL Server. We will also have a look at more “realistic” examples using Microsoft’s AdventureWorks database.

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