SQL Server Pain Relief

 

What Is AES? AES stands for Advanced Encryption Standard. It is a symmetric block cipher that is used by the U.S. government to protect classified information. AES is used worldwide to protect classified data around the world. AES is essential in cybersecurity, electronic data protection, and computer security. Variations of AES AES is used in three block cipher versions namely AES 128, AES 192, AES 256. AES 128 uses 128-bit key length to encrypt and decrypt block messages. This is a symmetric secret key which means it uses same secret key for encrypting and decrypting message blocks. AES Encryption of Excel File Today we will AES 128 to encrypt an Excel File. The excel file looks like the following image. To encrypt this excel file, we will use C#. First, we need to create a console project. Let's name the project ExcelEncryption. First, we try to understand what we need to achieve. We need a KEY and Initialization Vector (IV) pair for AES 128 encryption. Let’s say, th

C# Class from SQL Database Table There are multiple ways you can generate a C# class from your Database Table. We will be covering the following topics in today’s article. Generate Class with foreign key relation Generate Class with only entities Generate Class with foreign key relations For this we can simply use Entity Frameworks EDMX update feature which will generate our C# class from Database Tables. The output from EDMX will contain foreign key relations which we can see from the virtual interfaces like this -  public partial class AssetItem { [System.Diagnostics.CodeAnalysis.SuppressMessage("Microsoft.Usage", "CA2214:DoNotCallOverridableMethodsInConstructors")] public AssetItem() { this .AssetItemDepreciations = new HashSet<AssetItemDepreciation>(); this .AssetTaxMappings = new HashSet<AssetTaxMapping>(); this .AssetVatMappings = new HashSet<AssetVatMapping>();

SQL Server 2019: Intelligent Query Processing SQL Server 2019 ships with some brand-new features. Many of these features are targeted for Big Data Solutions. No wonder in that, since the world is moving faster towards Big Data and it is absolutely necessary to cope up with that. Today we will discuss one such feature called Approximate Query Processing. Approximate Query Processing SQL Server ships with Intelligent Query Processing out of the box with SQL Server 2019 installation. Approximate Query processing is a part of Intelligent Query Processing. Things we will be covering in this article – Understand the need for Approximation with Case Study Case Study 1: Railway Case Study 2: e-commerce How to use Approximate Query Processing Demo Code for Comparing Performance Results Limitations When to avoid Approximate Query Processing Understand the need for Approximate Query Processing Before using any technological feature, we must understand why we should use it? Should we jus

When writing queries, we seem to care less about the performance issue at first. Our first goal is to make the output right. When we get the correct output, we then move on to the next phase we call performance tuning. Today we will try to understand what happens when you write OR in your query. We will do the same thing with UNION ALL and try to understand which one seems to perform better.

SQL Server’s availability group Always On feature is great to have features for your Database. Anytime one of your database nodes goes down, your secondary replica will automatically take over. After a failover, your secondary cluster node becomes the primary cluster. Now the question arises, “Do I need to configure my APP server connectionstring each time I face a failover cluster?”. The answer is NO, you don’t have to configure your app server connectionstring every time. Default ConnectionString By default, your App server connectionstring looks something like this – <connectionStrings>    <add name="ConnStringDb1" connectionString="Data Source=localhost;Initial Catalog=YourDataBaseName;Integrated Security=True;" providerName="System.Data.SqlClient" />   </connectionStrings> ConnectionString for Failover Partner You can manually specify the failover partner in your connectionstring like this <connectionStrings>     <a