Microsoft SQL Server - Wikipedia. Microsoft SQL Server. Developer(s)Microsoft. Initial release. April 2. SQL Server 1. 0. Stable release. SQL Server 2. 01. June 1, 2. 01. 6; 4 months ago (2. Development status. Active. Written in. C, C++Operating system. Microsoft Windows, Windows Server, Linux (beta in March 2. As a database server, it is a software product with the primary function of storing and retrieving data as requested by other software applications. The RTM version is 1. SQL Server 2. 01. Microsoft Sql Server Client Tools 2005 HarleyMicrosoft Sql Server Client Tools 2005 CalendarIt supports 2. 56 logical processors and virtually unlimited memory and comes with Stream. Insight Premium edition. It can manage databases as large as 5. If you work with Microsoft SQL Server and are a visual type, then you might be interested in these free Microsoft Visio stencils for SQL Server 2005. Part of the Microsoft SQL Server Feature Pack, a useful component that is very important for applications that are designed to connect with Server 2012 is. Description SQL Server 2005 Sp1 is applied, All the check marks passed, It s reporting failed on Product: Backward Compatibility. 08/02/2006 11:48:49.779. Download the February 2007 Feature Pack for Microsoft SQL Server 2005, a collection of standalone install packages that provide additional value for SQL Server 2005. SQL Server 2016 delivers breakthrough mission critical performance, deeper insights across any data on many devices, and enables the power of hyperscale. SQL Server 2. 01. Enterprise Edition supports 1. It differs from Enterprise edition in that it supports fewer active instances (number of nodes in a cluster) and does not include some high- availability functions such as hot- add memory (allowing memory to be added while the server is still running), and parallel indexes. Hello freinds, i m a newbie, i wnt to know how i can find out 'SQL Server Client Connectivity Tools' is installed on my server. Microsoft SQL Server is a relational database management system developed by Microsoft. As a database server, it is a software product with the primary function of. Web. SQL Server Web Edition is a low- TCO option for Web hosting. Business Intelligence. Introduced in SQL Server 2. Self Service and Corporate Business Intelligence. It includes the Standard Edition capabilities and Business Intelligence tools: Power. Pivot, Power View, the BI Semantic Model, Master Data Services, Data Quality Services and x. Velocity in- memory analytics. Note that this edition has been retired in SQL Server 2. While there are no limitations on the number of databases or users supported, it is limited to using one processor, 1 GB memory and 1. GB database files (4 GB database files prior to SQL Server Express 2. R2). Two additional editions provide a superset of features not in the original Express Edition. The first is SQL Server Express with Tools, which includes SQL Server Management Studio Basic. SQL Server Express with Advanced Services adds full- text search capability and reporting services. Unlike the other editions of SQL Server, the SQL CE engine is based on SQL Mobile (initially designed for use with hand- held devices) and does not share the same binaries. Due to its small size (1 MB DLL footprint), it has a markedly reduced feature set compared to the other editions. For example, it supports a subset of the standard data types, does not support stored procedures or Views or multiple- statement batches (among other limitations). It is limited to 4 GB maximum database size and cannot be run as a Windows service, Compact Edition must be hosted by the application using it. The 3. 5 version includes support for ADO. NET Synchronization Services. SQL CE does not support ODBC connectivity, unlike SQL Server proper. Developer. SQL Server Developer Edition includes the same features as SQL Server Enterprise Edition, but is limited by the license to be only used as a development and test system, and not as production server. Starting early 2. Microsoft made this version free of charge to the public. This edition does not include SQL Server Integration Services, Analysis Services, or Reporting Services. Discontinued editions. SQL Server 7 and SQL Server 2. Intended for use as an application component, it did not include GUI management tools. Later, Microsoft also made available a web admin tool. Included with some versions of Microsoft Access, Microsoft development tools, and other editions of SQL Server. Had workload or connection limits like MSDE, but no database size limit. Includes standard management tools. Intended for use as a mobile / disconnected proxy, licensed for use with SQL Server 2. Standard edition. All operations that can be invoked on SQL Server are communicated to it via a Microsoft- defined format, called Tabular Data Stream (TDS). TDS is an application layer protocol, used to transfer data between a database server and a client. Initially designed and developed by Sybase Inc. Consequently, access to SQL Server is available over these protocols. In addition, the SQL Server API is also exposed over web services. SQL Server supports different data types, including primary types such as Integer, Float, Decimal, Char (including character strings), Varchar (variable length character strings), binary (for unstructured blobs of data), Text (for textual data) among others. The rounding of floats to integers uses either Symmetric Arithmetic Rounding or Symmetric Round Down (fix) depending on arguments: SELECT Round(2. Microsoft SQL Server also allows user- defined composite types (UDTs) to be defined and used. It also makes server statistics available as virtual tables and views (called Dynamic Management Views or DMVs). In addition to tables, a database can also contain other objects including views, stored procedures, indexes and constraints, along with a transaction log. A SQL Server database can contain a maximum of 2. OS- level files with a maximum file size of 2. Secondary data files, identified with a . Log files are identified with the . A page is the basic unit of I/O for SQL Server operations. A page is marked with a 9. ID of the object that owns it. Page type defines the data contained in the page: data stored in the database, index, allocation map which holds information about how pages are allocated to tables and indexes, change map which holds information about the changes made to other pages since last backup or logging, or contain large data types such as image or text. While page is the basic unit of an I/O operation, space is actually managed in terms of an extent which consists of 8 pages. A database object can either span all 8 pages in an extent (. A row in a database table cannot span more than one page, so is limited to 8 KB in size. However, if the data exceeds 8 KB and the row contains varchar or varbinary data, the data in those columns are moved to a new page (or possibly a sequence of pages, called an allocation unit) and replaced with a pointer to the data. The partition size is user defined; by default all rows are in a single partition. A table is split into multiple partitions in order to spread a database over a computer cluster. Rows in each partition are stored in either B- tree or heap structure. If the table has an associated, clustered index to allow fast retrieval of rows, the rows are stored in- order according to their index values, with a B- tree providing the index. The data is in the leaf node of the leaves, and other nodes storing the index values for the leaf data reachable from the respective nodes. If the index is non- clustered, the rows are not sorted according to the index keys. An indexed view has the same storage structure as an indexed table. A table without a clustered index is stored in an unordered heap structure. However, the table may have non- clustered indices to allow fast retrieval of rows. In some situations the heap structure has performance advantages over the clustered structure. Both heaps and B- trees can span multiple allocation units. Any 8 KB page can be buffered in- memory, and the set of all pages currently buffered is called the buffer cache. The amount of memory available to SQL Server decides how many pages will be cached in memory. The buffer cache is managed by the Buffer Manager. Either reading from or writing to any page copies it to the buffer cache. Subsequent reads or writes are redirected to the in- memory copy, rather than the on- disc version. The page is updated on the disc by the Buffer Manager only if the in- memory cache has not been referenced for some time. While writing pages back to disc, asynchronous I/O is used whereby the I/O operation is done in a background thread so that other operations do not have to wait for the I/O operation to complete. Each page is written along with its checksum when it is written. When reading the page back, its checksum is computed again and matched with the stored version to ensure the page has not been damaged or tampered with in the meantime. As such, it needs to control concurrent access to shared data, to ensure data integrity. SQL Server provides two modes of concurrency control: pessimistic concurrency and optimistic concurrency. When pessimistic concurrency control is being used, SQL Server controls concurrent access by using locks. Locks can be either shared or exclusive. Exclusive lock grants the user exclusive access to the data. Shared locks are used when some data is being read. The latter would have to wait for all shared locks to be released. Locks can be applied on different levels of granularity. For indexes, it can either be on the entire index or on index leaves. The level of granularity to be used is defined on a per- database basis by the database administrator. While a fine grained locking system allows more users to use the table or index simultaneously, it requires more resources. So it does not automatically turn into higher performing solution. SQL Server also includes two more lightweight mutual exclusion solutions. SQL Server uses them for DMVs and other resources that are usually not busy. SQL Server also monitors all worker threads that acquire locks to ensure that they do not end up in deadlocks. The Lock Manager maintains an in- memory table that manages the database objects and locks, if any, on them along with other metadata about the lock. Access to any shared object is mediated by the lock manager, which either grants access to the resource or blocks it. SQL Server also provides the optimistic concurrency control mechanism, which is similar to the multiversion concurrency control used in other databases. The mechanism allows a new version of a row to be created whenever the row is updated, as opposed to overwriting the row, i. ID of the transaction that created the version of the row. Both the old as well as the new versions of the row are stored and maintained, though the old versions are moved out of the database into a system database identified as Tempdb. When a row is in the process of being updated, any other requests are not blocked (unlike locking) but are executed on the older version of the row. Microsoft SQL Server Download. Microsoft SQL Server is a relational database management suite aiming to facilitate and ease data warehousing and application development. It is a cloud- ready platform, which means organizations can benefit from protection while deploying and synchronizing data across desktops and modern devices. SQL Server’s high rate of success is mostly due to its power to store and then retrieve data for third- party software that rely on it to successfully manage information inside databases. Another advantage is brought by the advanced security features that protect critical workloads from unauthorized access. Built to satisfy a wide array of audiences, Microsoft SQL Server is available in multiple editions, each targeting a different purpose. The most popular are SQL Server Enterprise, which aside from the core engine, includes a rich list of add- ons and extensive processor support, followed by SQL Server Standard, which features support for fewer instances and is addressed to medium level businesses. The most recent of the editions is Business Intelligence, which includes memory analytics and focuses on Self Service. Perhaps one of the most important features is provided by the server to cloud technology, which is a quick and trustworthy architecture for flexible application deployment. Furthermore, data synchronization is facilitated through scenarios that involve Windows Azure SQL Database Data Sync, which accomplishes bi- directional communication between the datacenter and the cloud. Microsoft SQL Server delivers amazing uptimes and undeniable performance, virtues confirmed by the various industries that use it as a basis for developing highly reliable platforms. Downtimes are minimized and application availability is enhanced with the aid of the integrated disaster recovery solution, which prevents companies from wasting money on third- party backup solutions. Developers, as well as end users gain in- depth insight through the data exploration and visualization capabilities, which are delivered via a browser- based approach. Collaboration and sharing, as well as reporting are facilitated through a collection of tools that integrate inside Excel and Share. Point. In conclusion, Microsoft SQL Server is one of the most reliable database technologies that delivers blazing fast performance and scalability, making itself available in a variety of editions for all types of audiences.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. Archives
December 2016
Categories |