New features of SQL 2012

Sathyan Rsathyanr@mindfiresolutions.com

ALL SAMPLES FROM ADVENTUREWORKS2012 DB

Agenda

- Shortcuts - New DMVs - Spatial Indexes - Columstore Indexes - String Functions - DateTime Functions - Conversion Functions - Offset and Fetch - Sequence - With Result Sets - Error Handling Enhancements - Filetable - Analytical Functions - Questions posed by Big Data

Shortcuts

Keyboard ShortcutsQuery ShortcutsFormatting ShortcutsAuto Recover (Old)Visual Studio CompatibleFull List

New DMVs

Server state information that can be used to monitor the health of a server instance, diagnose problems, and tune performance.

Multiple Types (DB, Extended Events, Execution, Mirroring, CLR, Index, I/O, Security, Etc.)

New Additions in 2012Select *

Spatial Indexes

Faster build time for spatial indexes on point data – critical for tables with millions of rows

Optimized STDistance and STBuffer FunctionsRow Compression and Page Compressionsp_help_spatial_geography_histogram

sp_help_spatial_geometry_histogramMore Details

Columnstore Indexes

Star Schema - Fact table – Dimension TableRow Based StorageColumnstore Indexes – Performance

ImprovementSyntaxRestrictions – Insert/UpdateData type restrictionsClustered Columnstore Index?

String Functions

CONCAT◦Auto Handles NULL

FORMAT◦Addresses Issues in DateTime Formatting ◦Culture specific same as in .NET ◦FORMAT ( value, format [, culture ] )

DATETIME Functions

EOMONTHDATEFROMPARTS

◦Sample, Format DateDATETIME2FROMPARTSTIMEFROMPARTSDATETIMEFROMPARTSDATETIMEOFFSETFROMPARTS

Conversion Functions

TRY_PARSEPARSETRY_CONVERT

Logical Functions

IIFCHOOSE

Offset and Fetch

Are You Paginating Right?

SEQUENCE

IdentitySEQUENCE - at DB level - used across

multiple tables – Controlled by AppSEQUENCE can be reset without altering

its previous value – MIN – MAX - CYCLE

SEQUENCE USAGE - MSDN

The application requires a number before the insert into the table is made. The application requires sharing a single series of numbers between multiple

tables or multiple columns within a table. The application must restart the number series when a specified number is

reached. For example, after assigning values 1 through 10, the application starts assigning values 1 through 10 again.

The application requires sequence values to be sorted by another field. The NEXT VALUE FOR function can apply the OVER clause to the function call. The OVER clause guarantees that the values returned are generated in the order of the OVER clause's ORDER BY clause.

An application requires multiple numbers to be assigned at the same time. For example, an application needs to reserve five sequential numbers. Requesting identity values could result in gaps in the series if other processes were simultaneously issued numbers. Calling sp_sequence_get_range can retrieve several numbers in the sequence at once.

You need to change the specification of the sequence, such as the increment value.

WITH RESULT SETS

change the column names and data typesof the result set returned in the execution of a SP

Error Handling With Throw

Much Easier, SimplerSimilar to .NETNo need of @@RAISE_ERROR Anymore

Filetable

Filetable in SQL 2012http://www.ourgoalplan.com/KLMS/TipView

.aspx?id=3241

Analytical Functions

FIRST_VALUELAST_VALUELAGLEAD

Questions Posed by BigData

Velocity Volume Variability Hadoop - DFSFacebook Twitter GoogleTwo different reasonsSSD – Solid State Data Storage allows

100,000s IOPS Vs 150 to 200Hortonworks and Cloudera