ITCamp 2012 - Cristi Lefter - SQL Server 2012 for developers

itcampro @ itcamp12 # Premium conference on Microsoft technologies

SQL Server 2012 for developers

Cristian Lefter, SQL Server MVP

http://about.me/CristianLefter


Mobile &

Development ITCamp 2012 sponsors


Mobile &

Development

• Columnstore indexes

• Business Intelligence Development Studio

• SQL Server Express LocalDB

• Transact-SQL improvements

• Extended Events enhancements

• SQL Server 2012 certification

• Next steps

Agenda


COLUMNSTORE INDEXES


Mobile &

Development Columnstore indexes Row Store (Heap / B-Tree)

ProductID OrderDate Cost

310 20010701 2171.29

311 20010701 1912.15

312 20010702 2171.29

313 20010702 413.14

Column Store (values compressed)

5

data page 1000

ProductID OrderDate Cost

314 20010701 333.42

315 20010701 1295.00

316 20010702 4233.14

317 20010702 641.22

data page 1001

ProductID

310

311

312

313

314

315

316

317

318

319

320

321

data page 2001

OrderDate

20010701

…

20010702

…

…

20010703

…

…

…

…

20010704

…

data page 2000

data page 2002

Cost

2171.29

1912.15

2171.29

413.14

333.42

1295.00

4233.14

641.22

24.95

64.32

1111.25


Mobile &

Development

• Performance improvements for “typical” data

warehouse queries from 10x to 100x

• Ideal candidates include queries against star

schemas that use filtering, aggregations and

grouping against very large fact tables

Columnstore indexes

6


Mobile &

Development

Technologies:

Storage

• Data is stored in a compressed columnar data format (stored by column) instead of row store format (stored by row).

• Columnar storage allows for less data to be accessed when only a sub-set of columns are referenced

New “batch mode” execution

• Data can then be processed in batches (1,000 row blocks) versus row-by-row

• Depending on filtering and other factors, a query may also benefit by “segment elimination” - bypassing million row chunks (segments) of data, further reducing I/O

Columnstore indexes

7


Mobile &

Development

When to use it

Table candidates:

• Very large fact tables (for example – billions of rows)

• Larger dimension tables (millions of rows) with compression friendly column data

Query candidates (against table with a columnstore index):

• Scan versus seek (columnstore indexes don’t support seek operations)

• Sub-set of columns (being selective in columns versus returning ALL columns)

• Single-column joins between columnstore indexed table and other tables

Columnstore indexes

8


MICROSOFT SQL SERVER DATA TOOLS


Mobile &

Development

SQL Server Data Tools (SSDT)

• Formerly known as SQL Server Developer Tools, Code-Named “Juneau”.

• SSDT is an evolution of the Visual Studio for Database Professionals ("Data Dude").

• Development tool for the SQL Server and SQL Azure Database Developer.

• Can be installed standalone or can be integrated into an existing Visual Studio 2010 installation (Pro and above).

• It will also ship with the next major release of Visual Studio (Visual Studio 2011).

Microsoft SQL Server Data Tools


Mobile &

Development

Features

• Targets SQL Server 2005, SQL Server 2008, SQL Server 2008 R2, SQL Server 2012 and SQL Azure

• Migrate on-premise SQL Server schemas to the cloud on SQL

• SQL CLR Development

• Rich disconnected (project-based) development model – Code analysis

– Dependency tracking

– Refactoring

– Intellisense

• Connected model

• Data-tier Application (DAC Fx) model – Script generation also possible



Mobile &

Development


• Single project can target multiple platforms − SQL Server versions

− SQL Azure

• Project build provides errors/warnings − Specific to target

− No need to create and execute scripts to find issues

PLATFORM TARGETING


Mobile &

Development


SSDT supports adding SQL CLR objects to database projects

−No need for separate SQL CLR projects

−C# and VB

−Seamless debugging and deployment

−SQLCLR properties tabs on database projects

−Separate projects still supported

SQL Server Data Tools SQL CLR Support


SQL SERVER EXPRESS LOCALDB


Mobile &

Development

• SQL Server edition aimed at developers – User-mode, in process execution

– Zero configuration installation

– Transparent database engine for embedding in applications

– Minimal pre-requisites

– Minimal files copied during deployment

– Designed for use in multiple environments

– Used as a test platform for developers

– Embedded database for production applications

– SQLLocalDB.exe utility for management

– Replaces user instance support in SQL Express

– SQL Express user instance support deprecated since SQL Server 2008

– Supports AttachDBFileName in connection string

– Specify location of database files

SQL Server Express LocalDB


Mobile &

Development

• Similar to working with other editions

– Same SQLServr.exe executable

– Same client-side providers

– Same T-SQL

• Installed once per version per machine

– Applications each launch their own copies of exe

• No services are installed

– Processes started/stopped automatically as needed

– Applications connect to "Data Source=(localdb)/v11.0"

– LocalDB launched as a child process of the application

– LocalDB process shuts down a few minutes after last connection drops

SQL Server Express LocalDB


Mobile &

Development SQL Server Express LocalDB

Feature SQL Server Compact 3.5 SP2

SQL Server Compact 4.0

SQL Server Express 2012

SQL Server 2012 LocalDB

Deployment/Installation Features

Installation size 2.5 MB download size 12 MB expanded on disk

2.5 MB download size 18 MB expanded on disk

120 MB download size > 300 MB expanded on disk

32 MB download size > 160 MB on disk

ClickOnce deployment Yes Yes Yes Yes

Privately installed, embedded, with the application

Yes Yes No No

64-bit support Yes Yes Yes Yes

Runs as a service No – In process with application

No - In process with application

Yes No – as launched process


Mobile &

Development SQL Server Express LocalDB

Feature SQL Server Compact 3.5 SP2

SQL Server Compact 4.0



Data file features

File format Single file Single file Multiple files Multiple files

Data file storage on a network share

No No No No

Support for different file extensions

Yes Yes No No

Database size support 4 GB 4 GB 10 GB 10 GB

XML storage Yes – stored as ntext

Yes - stored as ntext

Yes Yes

Binary (BLOB) storage Yes – stored as image

Yes - stored as image

Yes Yes

FILESTREAM support No No Yes No


Mobile &

Development SQL Server Express LocalDB Feature SQL Server

Compact 3.5 SP2 SQL Server Compact 4.0



Programmability

Procedural T-SQL - Select Case, If, features

No No Yes Yes

Simple transactions Yes Yes Yes Yes

Distributed transactions

No No Yes Yes

Native XML, XQuery/XPath

No No Yes Yes

Stored procedures, views, triggers

No No Yes Yes

Role-based security No No Yes Yes

Number of concurrent connections

256 (100) 256 Unlimited Unlimited (but only local)


T-SQL IMPROVEMENTS


Mobile &

Development

• Query Pagination

• OVER Clause Windowing

• Sequences

• Metadata Discovery

• Enhanced Function Library

• Service Broker Enhancements

• General T-SQL-Related Enhancements

T-SQL improvements


Mobile &

Development

Query Pagination Syntax:

Example:

T-SQL improvements

SELECT ProductID, Name,Color, Size FROM Production.Product ORDER BY Color,ProductID ASC OFFSET 100 ROWS FETCH NEXT 25 ROWS ONLY; END;

OFFSET <offset_value> ROW|ROWS FETCH FIRST|NEXT <fetch_value> ROW|ROWS [ONLY]


EXTENDED EVENTS ENHANCEMENTS


Mobile &

Development

Extended Events

• A general event-handling system for server systems.

• It allows defining events to be monitored and provides a variety of ways to consume the events.

• It can be synchronous or asynchronous (events are fired synchronously).

• It can trigger actions when an event fires.

• It uses predicates to filter events from consumers.

• It has high performance and good scalability.

• The cost of firing a single event is extremely small (approximately 2 μs CPU time on a 2 GHz processor).

Extended Events enhancements


Mobile &

Development

Extended Events – what’s new

• Management Studio provides support for Extended Events

under the Management folder in Object Explorer

– Target data can be read using the data viewer in Management Studio

• NumberOfEventsMonitored+=hundreds (compared to SQL

Server 2008)

• Management API for .NET Extended Events support


QueryableXEventData stream = new QueryableXEventData(

@"Data Source = (local); Initial Catalog =

master; Integrated Security = SSPI",

"system_health",

EventStreamSourceOptions.EventStream,

EventStreamCacheOptions.DoNotCache);


Mobile &

Development

Example


DECLARE @dbid int = db_id('AdventureWorksDW2008') DECLARE @sql nvarchar(1024) = 'CREATE event session LockCounts ON SERVER

ADD EVENT sqlserver.lock_acquired (WHERE database_id =' + CAST(@dbid AS nvarchar) +')

ADD TARGET package0.synchronous_bucketizer (

SET filtering_event_name=''sqlserver.lock_acquired'', source_type=0, source=''resource_0'')'; EXEC (@sql); GO ALTER EVENT session LockCounts ON SERVER STATE=start; GO

EVENT

TARGET


Mobile &

Development

Example


SELECT name, object_id, lock_count FROM (SELECT objstats.value('.','bigint') AS lobject_id, objstats.value('@count', 'bigint') AS lock_count FROM ( SELECT CAST(xest.target_data AS XML) LockData FROM sys.dm_xe_session_targets xest JOIN sys.dm_xe_sessions xes ON xes.address = xest.event_session_address JOIN sys.server_event_sessions ses ON xes.name = ses.name WHERE xest.target_name = 'synchronous_bucketizer' AND xes.name = 'LockCounts' ) Locks CROSS APPLY LockData.nodes('//BucketizerTarget/Slot') AS T(objstats) ) LockedObjects INNER JOIN sys.objects o ON LockedObjects.lobject_id = o.object_id WHERE o.type != 'S' AND o.type = 'U' ORDER BY lock_count desc;


Mobile &

Development

Example


-- -- Stop the event session. -- ALTER EVENT SESSION LockCounts ON SERVER state=stop; GO


Mobile &

Development

If a picture is worth a thousand words …

… a 5 minute demo is worth ???

150.000 words

(using the assumption that the human eye

need at least 500 fps to perceive reality without

any distortion)



SQL SERVER 2012 CERTIFICATION


Mobile &

Development SQL Server 2012 certification

• MCSA - Microsoft Certified Solutions Associate

• MCSE - Microsoft Certified Solutions Expert

• MCSD - Microsoft Certified Solutions Developer

• MTA - Microsoft Technology Associate

• MCSM – Microsoft Certfied Solutions Master


Mobile &


Master

Expert

Associate

Microsoft

Certifications

Microsoft Cloud-

built

Certifications

MCM (Master) MCSM

(Solutions

Master)

MCITP (IT

Professional)

MCPD

(Professional

Developer)

MCSE (Solutions

Expert)

MCSD

(Solutions

Developer)

MCTS

(Technology

Specialist)

MCSA (Solutions

Associate)


Mobile &


Warning:

You can complete your MCITP or MCTS on SQL

Server 2008 until July 2013


NEXT STEPS


Mobile &

Development

• SQL Server 2012 Update for Developers

Training Workshop http://bit.ly/sql2012ro

• SQL Server Virtual Labs

http://www.microsoft.com/sqlserver/en/us/le

arning-center/virtual-labs.aspx

• Migrating from SQL Trace to Extended Events

Mike Wachal’s Blog

• ROSQL http://sqlserver.ro

Next Steps

http://bit.ly/sql2012ro



http://www.microsoft.com/sqlserver/en/us/learning-center/virtual-labs.aspx







http://sqlserver.ro/


Q & A

ITCamp 2012 - Cristi Lefter - SQL Server 2012 for developers

Technology

visual studio

sql server

microsoft

set

row

events

sql

data