Tutorials,Articles,Algorithms,Tips,Examples about Database

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SQL Server 2012 : Exploring SQL CLR - Deployment (part 2) - Deploying Your Stored Procedures, Testing Your Stored Procedures

In the SQL Server Database Project version of the sample code, deployment of all the stored procedures is handled by Visual Studio when the assembly itself is deployed.

SQL Server 2012 : Exploring SQL CLR - Deployment (part 1) - Deploying Your Assembly

Having completed a successful build, you’re now ready to publish the database, and deploy the assembly in the process. Select Build | Publish SQLCLRDemo from the main menu now ; this will bring up the Publish Database dialog box, shown in Figure 2.

SQL Server 2012 : Exploring SQL CLR - Your First SQL CLR Stored Procedure, CLR Stored Procedures and Server-Side Data Access

Although SQL CLR programming can get quite complex and involved, in reality it offers a simple model that any .NET developer can use with high productivity in relatively short order.

SQL Server 2012 : Exploring SQL CLR - Visual Studio/SQL Server Integration

SSDT and SQL Server 2012 integrate tightly in a number of ways. It’s important to realize, however, that the use of SSDT is completely optional and the use of T-SQL is a sufficient substitute.

SQL Server 2008 : DBCC validation - Removing corruption

Despite the existence of DBCC options for repairing corruption, certain repairs occur at the expense of data loss; hence, the inclusion of ALLOW_DATA_LOSS as part of the name of one of the repair options. As such, using this option should be considered a last resort.

SQL Server 2008 : Mirroring in action (part 3) - Suspending and resuming mirroring, Initiating failover

When suspended, the mirroring session remains in place for later resumption with the principal database available for use. While suspended, transactions aren't copied to the mirror database.

SQL Server 2008 : Mirroring in action (part 2) - Monitoring database mirroring

There are several tools and techniques for monitoring database mirroring, including system stored procedures, catalog views, performance counters, and the GUI-based Database Mirroring Monitor.

SQL Server 2008 : Mirroring in action (part 1) - Mirroring setup

A transaction log backup must be restored in order to obtain the latest log sequence number (LSN) to determine the starting point for the redo queue when mirroring starts.

SQL Server 2008 : High availability with database mirroring - Failover options

The last bullet is a crucial item and requires more explanation. There are various types of failure conditions that may lead to the loss of the principal and are broadly categorized into hard and soft errors. An example of a hard error is a power failure; a TCP/IP timeout is regarded as a soft error.

Programming ASP.NET 3.5 : Data Source-Based Data Binding (part 4) - Iterative Controls

Iterative controls are a special type of data-bound controls that supply a template-based mechanism to create free-form user interfaces. Iterative controls take a data source, loop through the items, and iteratively apply user-defined HTML templates to each row.

Programming ASP.NET 3.5 : Data Source-Based Data Binding (part 3) - List Controls

List controls display (or at least need to have in memory) many items at the same time—specifically, the contents of the data source. Depending on its expected behavior, the control picks the needed items from memory and properly formats and displays them.

Programming ASP.NET 3.5 : Data Source-Based Data Binding (part 2) - Data-Binding Properties

In ASP.NET, there are two main categories of data-bound controls—list and iterative controls. As we’ll see in detail later on, list controls repeat a fixed template for each item found in the data source.

Programming ASP.NET 3.5 : Data Source-Based Data Binding (part 1) - Feasible Data Sources

Many .NET classes can be used as data sources—and not just those that have to do with database content. In ASP.NET, any object that exposes the IEnumerable interface is a valid bindable data source.

SQL Server 2008 : Database mirroring overview, Mirroring modes

A database mirroring session begins with the mirror instance identifying the log sequence number (LSN) of the last transaction applied to the mirror database. The mirror instance then obtains any outstanding transactions from the transaction log of the principal database.

SQL Server 2008 : Transaction log shipping - Usage scenarios, Setting up and monitoring log shipping

Log shipping can be used to provide an offsite, up-to-date copy of a mission-critical database. In the event of total environment destruction, the offsite copy can quickly restore any remaining logs and be brought online and available for application usage.

SQL Server 2008 : High-availability options

Broadly defined, a high-availability solution refers to any system or mechanism put in place to ensure the ongoing availability of a SQL Server instance in the event of a planned or unplanned outage.

SQL Server 2008 : Policy-based management - Advanced policy-based management

The policies we've looked at so far have all been based on static server properties, such as checking the value of various surface area configuration properties to determine whether xp_cmdshell is enabled.

SQL Server 2008 : Policy-based management - Enterprise policy management

In SQL Server 2005 we could use the registered servers feature to register and group frequently managed servers. For example, we could create a production group, containing multiple production servers, and a test group containing multiple test servers.

SQL Server 2012 : Interpreting Query Execution Plans - Viewing Query Execution Plans

SQL Server can return the estimated query execution plan before the query is executed, or it can return the actual query execution plan with the results of the query.

SQL Server 2012 : SQL Server Management and Development Tools - Using the Query Editor

With SQL Server 2005, the Query Editor carried on the legacy of SQL Server's Query Analyzer as the primary UI for database developers. In SQL Server 2008 and 2008R2, that experienced was enhanced and evolved.

SQL Server 2012 : SQL Server Management and Development Tools - Object Explorer (part 2)

If your goal is to print the database diagram, be sure to check the page breaks and arrange the tables first, or you might end up wasting a lot of paper. To view the page breaks, use the tool's context menu or the Database Diagram menu.

SQL Server 2012 : SQL Server Management and Development Tools - Object Explorer (part 1)

Each Database Engine server node includes Databases, Security, Server Objects, Replication, AlwaysOn High Availability, Management, Integration Services Catalogs, and SQL Server Agent. Most of the tree structure is fixed, but additional nodes are added as objects are created within the server.

SQL Server 2012 : SQL Server Management and Development Tools - Registered Servers

Registered Servers is an optional built-in feature; if you manage only one or a few SQL Servers, Registered Servers offers little benefit. If, however, you are responsible for many SQL Servers, or if you simply want an organized way to manage your registered instances, this is the right place to take control.

SQL Server 2012 : SQL Server Management and Development Tools - Organizing the Interface

Using the Visual Studio look and feel, most windows may float, be docked, be part of a tabbed window, or be hidden off to one side. The exception is the Query Editor, which shares the center window: the document window. Here multiple documents are presented using tabs to select a document.

SQL Server 2012 : SQL Server Private Cloud - Upgrading SQL Server

The Advisor tool can be run from a desktop and points to the server instance you wish to upgrade. The tool goes through a check of potential issues you may encounter given the server you wish to upgrade.

SQL Server 2012 : SQL Server Private Cloud - Discovering SQL Server Sprawl

The MAP tool is not meant to be an auditing tool. It doesn’t secretly send information back to Microsoft, so you don’t need to worry about Steve Ballmer knocking on your door after you use it demanding more money.

SQL Server 2012 : Storage Systems (part 7) - Measuring Performance - Storage Performance Testing

You have likely noticed how we have stressed that each workload is different. No single storage system will solve every technical or business problem. Any system must be validated prior to its production deployment.

SQL Server 2012 : Storage Systems (part 6) - Measuring Performance - Sequential Disk Access, File Layout, Flash Storage

Microsoft SQL Server and various hardware manufacturers partner to provide guidance for data warehouse systems. This program is called SQL Server Fast Track Data Warehouse. A data warehouse system is designed to hold a massive amount of data.

SQL Server 2012 : Storage Systems (part 5) - Measuring Performance - Storage Performance Counters, Disk Drive Performance

Windows Performance Monitor (perfmon) allows Windows Server users to capture storage performance metrics. For the purposes of storage monitoring, you utilize the LogicalDisk performance monitor object. Both logical and physical disk counters deliver storage performance metrics.

SQL Server 2012 : Storage Systems (part 4) - Storage Technology - Remote Data Replication, Windows Failover Clustering, SQL Server AlwaysOn Availability Groups

Both SAN and NAS array controllers offer external data replication. This feature enables two or more array controllers to synchronize data. Vendors provide either a real-time or a point-in-time data migration framework.

SQL Server 2012 : Storage Systems (part 3) - Storage Technology - Storage Tiering, Data Replication

SAN arrays offer both internal and external storage data replication. Internal replication consists of data snapshots and clones. Some storage arrays offer inner array data migration features. Both a snapshot (also called a snap) and a clone offer a point-in-time data copy. This data copy can be used for backup or reporting.

SQL Server 2012 : Storage Systems (part 2) - Storage Technology - SQL Server and the Windows I/O Subsystem

It has been our experience that most information technology professionals are not very good at predicting the future. When asked how much performance and space they anticipate needing over the next three to five years, administrators do their best to come up with an accurate answer, but unfortunately real life often belies this estimate.

SQL Server 2012 : Storage Systems (part 1) - Storage Technology

The Host Bus Adapter (HBA) handles connections from the server to storage devices and can also perform several other roles. While a basic HBA provides connectivity to storage, more advanced HBAs have embedded Array controllers.

SQL Server 2008 : Policy-based management - Policies in action (part 2) - Creating a database properties policy

Policies can be exported in one of two ways. First, you can simply right-click an existing policy and choose Export Policy. The resulting dialog box allows you to select a location in which to save the XML-based policy file.

SQL Server 2008 : Policy-based management - Policies in action (part 1) - Importing policies from file, Evaluating policies

SQL Server 2008 ships with a number of predefined policies that can be imported and evaluated. These policies encapsulate best practices such as those for securing the surface area of a SQL instance. In addition to importing these policies, new policies can be created and exported to file for later use on other server instances.

SQL Server 2008 : Policy-based management - Policy-based management terms

You can think of policy-based management as Active Directory for SQL Server. Active Directory is used in simplifying the process of administering thousands of domain users and computers.

SQL Server 2008 : Policy-based management - Server management challenges

Enterprise DBAs—those who manage complex environments with a mix of database products and versions—face a number of challenges. In addition to keeping many systems up and running, they need to provide a smooth path for the implementation of changes to production databases.

The Essential SSD Guide

Solid state drives save energy and can start your Windows in mere seconds. CHIP helps you make the right choice and give you a few pointers on switching to an SSD environment, as well as setting up a SSD RAID

Samsung 840 Pro And Samsung 840 SSDs Review (Part 4)

A SSD controller does not know which memory pages contain user data and which are considered available by the operating system. It happens this way because in file systems removing a file doesn’t involve its actual physical removal. Instead, the corresponding memory is marked in the file system as available for rewriting into.

Samsung 840 Pro And Samsung 840 SSDs Review (Part 3)

We use Anvil's Storage Utilities 1.0.51 to measure random and sequential ref and write speeds. The synthetic benchmarks integrated into this software suite provides an excellent overview of the products by experimentally checking out a wide variety of speed characteristics of the tested SSD.