What is MS SQL SERVER?

Microsoft SQL Server is the most popular and widely used RDBMS (Relational Database Management System), developed and marketed by Microsoft Corporation. It is used to create enterprise, web-based, and desktop database systems. The primary query languages of MS SQL Server are- T-SQL (Transaction- Structured Query Language) and ANSI SQL (American National Standard Institute Structured Query Language).

Microsoft SQL Server is available in various versions and editions. These versions and editions have different sets of features and target different users. The major versions of SQL Server are MS SQL Server 2008, 2005, and 2000. The most popular editions of this database management system are- SQL Server Compact Edition, SQL Server Developer Edition, SQL Server Enterprise Edition, SQL Server Web Edition, and SQL Server Standard Edition.

Data Storage in SQL Server

The major data storage unit of MS SQL Server is the database. A database is collection of several tables that have typed columns. Microsoft SQL Server supports various data types, which includes primary data types such as Integer, Decimal, Char, Float, binary, Varchar, and Text. Rounding of the Float to the Integers employs either Symmetric Round Down or Symmetric Arithmetic Rounding.

In Microsoft SQL Server, you can also define and use the UDT (user-defined composite data types). MS SQL Server also provides the server statistics as virtual views and tables (it is called DMV or Dynamic Management Views). Along with the database tables, SQL Server database can also have other objects, such as views, constraints, indexes, stored procedure, and transaction log. A MS SQL Server database may have maximum 231 objects. In addition to this, it can span several operating system-level files with maximum 220 TB file size.

The data in Microsoft SQL Server database is stored in the primary data file, which as .mdf file extension. MDF (Master Database File) is the main repository of all your valuable data in SQL Server database. The secondary data file, which has the .ndf file extension, holds optional metadata. The log files are stored with .ldf file extension.

Data Retrieval in SQL Server

You main way to retrieving the data from MS SQL Server database is querying. The database query is expressed via an SQL variant, known as T-SQL. T-SQL is a dialect that MS SQL Server contributes with the Sybase SQL Server because of its legacy. The queries are processed by query processor that find outs sequence of the steps, which are required for retrieving request data from the database.

In some critical situations, including virus infection, application malfunction, improper system shutdown, and more, SQL Server database gets damaged and stored data can not be accessed. It leads to significant data loss and requires SQL Server Recovery to be sorted out.

Stellar Phoenix SQL Recovery v4.0 repairs and restores corrupted SQL Server database files, MDF and NDF. This SQL Repair utility works well with MS SQL Server 2008, 2005, and 2000. The SQL Database Recovery software restores all MDF file objects, such as tables, reports, forms, macros, triggers, stored procedures, data types, and constraints.