This affiliate introduces the above new appearance provided in SQL Server 2012 and covers a cardinal of the enhancements to ahead accessible features.
With SQL Server currently on a 2-year absolution cycle, anniversary absolution is added of an evolutionary change from the antecedent absolution than a advocate change. Therefore, Microsoft SQL Server 2012 is not a breakthrough bound advanced from SQL Server 2008 R2, but it does accommodate a cardinal of absorbing new appearance and enhancements that added extend the performance, reliability, availability, programmability, and affluence of use of SQL Server. This affiliate introduces the above new appearance provided in SQL Server 2012 and covers a cardinal of the enhancements to ahead accessible features.
So what does SQL Server 2012 accept to action over SQL Server 2008 R2? Afterward is an overview of the new appearance provided in SQL Server 2012:
The afterward sections booty a afterpiece attending at anniversary of these new appearance and, area appropriate, accommodate references to consecutive capacity area you can acquisition added advice and detail about the new features.
SQL Server 2012 provides a few new appearance accompanying to abstracts storage, primarily advised to advance performance.
SQL Server 2012 provides an accessory to FILESTREAM accumulator by acceptance added than one filegroup to be acclimated to abundance FILESTREAM data. This can advance I/O achievement and scalability for FILESTREAM abstracts by accouterment the adeptness to abundance the abstracts on assorted drives. FILESTREAM storage, which was alien in SQL Server 2008, integrates the SQL Server Database Agent with the NTFS book system, accouterment a agency for autumn baggy abstracts (such as documents, images, and videos) with the database autumn a arrow to the data. Although the absolute abstracts resides alfresco the database in the NTFS book system, you can still use T-SQL statements to insert, update, query, and aback up FILESTREAM data, while advancement transactional bendability amid the baggy abstracts and agnate structured abstracts with aforementioned akin of security. For added advice on application FILESTREAM storage, see Affiliate 20, “Creating and Managing Tables.”
A new accumulator appearance alien in SQL Server 2012 is FileTable storage. FileTable is the new blazon of table that was added in SQL Server 2012. The FileTable builds aloft the FILESTREAM adequacy that was alien in SQL Server 2008. Like FILESTREAM, FileTable accumulator provides SQL Server admission to files that are stored in the Windows book system. FileTable differs from FILESTREAM in that FileTable allows for Windows applications to admission the files that are allotment of the FileTable definition. This book admission is nontransactional, and it comes afterwards accepting to accomplish changes to the Windows affairs that is accessing the files. For added advice on FileTable storage, see Affiliate 44, “What’s New for Transact-SQL in SQL Server 2012.”
SQL Server 2012 additionally introduces a new abstracts barn concern dispatch affection based on a new blazon of basis alleged an xVelocity anamnesis optimized columnstore. This new index, accumulated with added concern processing features, improves abstracts barn concern achievement by hundreds to bags of times in some cases and can commonly accord a tenfold speedup for a ample ambit of accommodation abutment queries. Columnstore indexes can absolute or annihilate the charge to await on prebuilt aggregates, including user-defined arbitrary tables and indexed (materialized) views. Unlike archetypal row storage, which food assorted rows of abstracts per page, a columnstore basis food the ethics for a distinct cavalcade in its own set of deejay pages. The advantage of columnar accumulator is the adeptness to apprehend the ethics of a specific cavalcade of a table afterwards accepting to apprehend the ethics of all the added columns. For added advice on the anatomy of columnstore indexes, see Affiliate 30, “Data Structures, Indexes, and Performance.” For added advice on creating and application columnstore indexes, see Affiliate 57, “Parallel Abstracts Barn Appliance.”
What would a new SQL Server absolution be afterwards new T-SQL commands and constructs to added aggrandize the adeptness and capabilities of the T-SQL language? SQL Server 2012 is no exception. The new constructs provided in SQL Server 2012 accommodate the following:
For added advice and examples of the new T-SQL appearance and enhancements, see Affiliate 44.
SQL Server provides some new scalability and achievement appearance including aberrant checkpoints and the FORCESCAN table hint.
Indirect checkpoints accommodate a apparatus for configuring checkpoint intervals at the alone database level. Aberrant checkpoints can accommodate potentially faster, added anticipated accretion times for your analytical databases than automated checkpoints. For added advice on aberrant checkpoints, see Affiliate 27, “Transaction Management and the Transaction Log.”
The new FORCESCAN table adumbration complements the FORCESEEK adumbration by acceptance you to specify that the concern optimizer use an basis browse operation as the admission aisle to the table or appearance referenced in the query. For added advice on the FORCESCAN table hint, see Affiliate 31, “Understanding Concern Optimization.”
SQL Server 2012 introduces Database Audit. Agnate to SQL Server Audit, Database Analysis is based on the new Extended Contest affection and enables you to analysis database-level contest or groups of events. For added advice on Database Audit, see Affiliate 16, “Security and Compliance.”
SQL Server 2012 additionally adds user-defined server roles. These new server roles accommodate the aforementioned blazon of adaptability that is accessible with user-defined database roles, but they are instead authentic at the server akin and advance accordance of the permissions at the server level, giving administrators an advantage that goes able-bodied above the adamant anchored server roles. For added advice on creating user-defined server roles, see Affiliate 17, “Security and User Administration.”
Contained database abutment was added in SQL Server 2012 forth with the accompanying changes to abutment affidavit to this blazon of database. Users can now be added to a database afterwards accepting a agnate SQL Server login. Affidavit instead takes abode at the database level. Absolute databases can be calmly confused from one server to addition afterwards the affidavit issues that accomplish noncontained database migrations added difficult. For added advice on configuring absolute databases, see Affiliate 19, “Creating and Managing Databases.”
One of the key new appearance in SQL Server 2012 is the AlwaysOn availability features. The new AlwaysOn appearance accommodate SQL Server administrators added adeptness and adaptability in their efforts adjoin accouterment both aerial availability and adversity recovery. The AlwaysOn appearance abide of AlwaysOn Availability Groups and AlwaysOn Failover Cluster Instances.
AlwaysOn Availability Groups abutment a failover ambiance for a detached set of user databases that abort over together. A distinct SQL Server instance can host assorted availability groups. In the accident of a failure, anniversary availability accumulation can be configured to abort over to altered SQL Server instances. For example, one availability accumulation can abort over to instance 2, addition availability accumulation to instance 3, and so on. You no best charge to accept a standby server that is able of administration the abounding amount of your primary server. An availability accumulation consists of a set of one or added read-write primary databases and from one to four alien accessory copies. The alien accessory databases can be set up as read-only copies that you can run assertive advancement operations and advertisement action against, demography cogent amount off the primary server afterwards the aliment and aerial of creating snapshots of the accessory databases.
The added affection that is allotment of the AlwaysOn Availability alms is AlwaysOn Failover Cluster Instances. This affection is an accessory to the absolute SQL Server failover clustering, which is based on Windows Server Failover Cluster (WSFC). AlwaysOn Failover Absorption provides college availability of SQL Server instance afterwards failover. Some of the improvements of AlwaysOn Failover Absorption over the absolute SQL Server failover absorption accommodate the adeptness to set up multisite failover absorption for bigger armpit protection, more-flexible failover policies, and bigger affection capabilities.
For added advice on the AlwaysOn Availability appearance of SQL Server 2012, see Affiliate 43, “SQL Server 2012 AlwaysOn Features.”
Statistical Semantic Chase builds aloft the absolute full-text chase affection in SQL Server but enables new scenarios that extend above keyword searches. While full-text chase lets you concern the words in a document, Semantic Chase lets you concern the acceptation of the document. Semantic Chase attempts to advance certificate searches by compassionate the contextual acceptation of the agreement and tries to accommodate the best authentic acknowledgment from a accustomed certificate repository. If you use a web chase agent like Google, you are already accustomed with Semantic Chase technology.
SQL Server Semantic Chase builds its indexes application the indexes created by full-text search. With Semantic Search, you can go above aloof analytic for specific words or strings in a document. Solutions are accessible that accommodate automated tag extraction, accompanying agreeable discovery, and hierarchical aeronautics above agnate content. For example, you can concern the basis of key phrases to body the anatomy for an organization, or you can concern the certificate affinity basis to analyze resumés that bout a accurate job description.
For added advice on Statistical Semantic Search, see Affiliate 51, “SQL Server Full-Text Search.”
Within Master Abstracts Services (MDS), SQL Server 2012 adds Abstracts Affection Services. Abstracts Affection Services complements MDS and is accessible by added key abstracts abetment apparatus aural the SQL Server environment. This affection enables you to body a adeptness abject of abstracts rules and use those to accomplish a array of analytical abstracts affection tasks, including correction, enrichment, standardization, and de-duplication of your data. This additionally includes the adeptness to do some basal abstracts profiling to bigger accept the candor and all-embracing abstracts affection accompaniment of your amount data.
Data Affection Services (DQS) consists of a Abstracts Affection Server and a Abstracts Affection Client. The DQS Server consists of three SQL Server catalogs with data-quality functionality and storage. The Abstracts Affection Client is a SQL Server aggregate affection that business users, advice workers, and IT professionals can use to accomplish computer-assisted abstracts affection analyses and administer their abstracts affection interactively. These DQS Cleansing apparatus can additionally be acclimated in Integration Services and MDS.
For added advice on alive with Abstracts Affection Services, see Affiliate 56, “Master Abstracts Services and Abstracts Affection Services.”
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