Eric Nelson Developer & Platform Group Microsoft Ltd [email_address] http://blogs.msdn.com/ericnel http://twitter.com/ericnel

Relational Improved XML UDTs New Filestream Hierarchy ID Date & Time Spatial data Sparse columns and wide tables Filtered indexes Change tracking Table parameters to SP calls Resource governor SP control and monitoring Database compression Declarative management ... SQL Server Integration Services VSTA replaces VSA ADO.NET Performance Merge ... Reporting Services “ IIS free” Tablix New designer ... BI Cube design Design alerts Performance ...

Relational

Improved

XML

UDTs

New

Filestream

Hierarchy ID

Date & Time

Spatial data

Sparse columns and wide tables

Filtered indexes

Change tracking

Table parameters to SP calls

Resource governor

SP control and monitoring

Database compression

Declarative management

...

SQL Server Integration Services

VSTA replaces VSA

ADO.NET

Performance

Merge

...

Reporting Services

“ IIS free”

Tablix

New designer

...

BI

Cube design

Design alerts

Performance

...

What is it? Technique for working with relational tables as if they were objects in memory Intention is to hide away the complexity of the underlying tables and give a uniform way of working with data Why use it? Productivity Retain database independence Notes There are many ORMs for .NET developers already in existence. E.g. LLBLGen Pro http://www.llblgen.com/ Nhibernate http://www.hibernate.org/343.html EntitySpaces http://www.entityspaces.net/Portal/Default.aspx Objects vs Classes vs Entities

What is it?

Technique for working with relational tables as if they were objects in memory

Intention is to hide away the complexity of the underlying tables and give a uniform way of working with data

Why use it?

Productivity

Retain database independence

Notes

There are many ORMs for .NET developers already in existence. E.g.

LLBLGen Pro http://www.llblgen.com/

Nhibernate http://www.hibernate.org/343.html

EntitySpaces http://www.entityspaces.net/Portal/Default.aspx

Objects vs Classes vs Entities

What is it? Tools and services to create an Entity Data Model EDM gives ORM to SQL Server, Oracle, DB2 etc Tools and services for consuming an Entity Data Model Why use it? Productivity Complex mapping between entities and database tables Works great with ADO.NET Data Services Notes Strategic but just released...

What is it?

Tools and services to create an Entity Data Model

EDM gives ORM to SQL Server, Oracle, DB2 etc

Tools and services for consuming an Entity Data Model

Why use it?

Productivity

Complex mapping between entities and database tables

Works great with ADO.NET Data Services

Notes

Strategic but just released...

Application model Mapped to a persistence store Comprised of three layers: Conceptual (CSDL) Mapping (MSL) Storage (SSDL) Database agnostic Comprised of: Entities Associations Functions Conceptual Mapping Storage Entity Data Model

Application model

Mapped to a persistence store

Comprised of three layers:

Conceptual (CSDL)

Mapping (MSL)

Storage (SSDL)

Database agnostic

Comprised of:

Entities

Associations

Functions

Entity Client Entity SQL Object Services Entity SQL LINQ To Entities

Entity Client

Entity SQL

Object Services

Entity SQL

LINQ To Entities

Familiar ADO.NET object model: EntityCommand EntityConnection EntityDataReader EntityParameter EntityTransaction Text-based results Read-only Uses Entity SQL

Familiar ADO.NET object model:

EntityCommand

EntityConnection

EntityDataReader

EntityParameter

EntityTransaction

Text-based results

Read-only

Uses Entity SQL

Queries materialized as Objects ObjectContext ObjectQuery<T> Built on top of Entity Client Two query options: Entity SQL LINQ Runtime services: Unit of work Identity tracking Eager/explicit loading

Queries materialized as Objects

ObjectContext

ObjectQuery<T>

Built on top of Entity Client

Two query options:

Entity SQL

LINQ

Runtime services:

Unit of work

Identity tracking

Eager/explicit loading

LINQ To Entities Object Services Entity SQL Entity Client ADO.NET Provider

Vendor DB Support Microsoft SQL Server Oracle Sample, Generic Sample Devart Oracle, MySQL, Postgress Phoenix SQLite Sybase SQLAnywhere Npgsql PostgreSQL IBM DB2, Informix Dynamic Server MySQL AB MySQL OpenLink Many via OpenLink ODBC or JDBC DataDirect Oracle, Sybase, SQL Server, DB2 Firebird Firebird

LINQ to SQL LINQ to Entities Database Support SQL Server Many Object Relational Mapping Capabilities Simple Complex Requires Attributed .NET Code No Yes Status Released Just Released 

LINQ to SQL var products = from prod in db.Product where prod.Color == &quot;Blue&quot; select prod; LINQ to Entities var products = from prod in db.Product where prod.Color == &quot;Blue&quot; select prod; In general – LINQ to Entities does more – but not always! Only migration that will ever happen is LINQ to SQL migration to LINQ to Entities

LINQ to SQL

var products = from prod in db.Product

where prod.Color == &quot;Blue&quot;

select prod;

LINQ to Entities

var products = from prod in db.Product

where prod.Color == &quot;Blue&quot;

select prod;

In general – LINQ to Entities does more – but not always!

Only migration that will ever happen is LINQ to SQL migration to LINQ to Entities

What is it? HTTP access to an object model exposed as RESTful Web Services Data and/or methods Data returned using ATOM or JSON Read/Write Why use it? Easy to expose data over the internet/intranet accessible by any client

What is it?

HTTP access to an object model exposed as RESTful Web Services

Data and/or methods

Data returned using ATOM or JSON

Read/Write

Why use it?

Easy to expose data over the internet/intranet accessible by any client

Data Access Layer Entity Framework Relational database Other sources Data Services Runtime Hosting/HTTP Listener Custom IQueryable/IEnumerable [+ IUpdatable] HTTP

Resources Res 1 Res 2 Res 3 Res 4 HTTP Request URL VERB Payload HTTP Response Status GET POST PUT DELETE XML JSON Payload XML JSON

Provide a type with public properties which are; IQueryable<T>, IEnumerable<T> Also get write access if your type implements; IUpdatable Works well with generated code from; ADO.NET Entity Framework ( ObjectContext ) LINQ to SQL ( DataContext* )

Provide a type with public properties which are;

IQueryable<T>, IEnumerable<T>

Also get write access if your type implements;

IUpdatable

Works well with generated code from;

ADO.NET Entity Framework ( ObjectContext )

LINQ to SQL ( DataContext* )

http:// blogs.msdn.com/ UKDevEvents Post event resources for all Microsoft UK developer focused sessions The team Eric Nelson http://blogs.msdn.com/ericnel Mike Ormond http://blogs.msdn.com/mikeormond Mike Taulty http://mtaulty.com

http:// blogs.msdn.com/ UKDevEvents

Post event resources for all Microsoft UK developer focused sessions

The team

Eric Nelson http://blogs.msdn.com/ericnel

Mike Ormond http://blogs.msdn.com/mikeormond

Mike Taulty http://mtaulty.com

Entity Data Model SSDL SQL Oracle Other SSDL HTTP Entity Client CSDL MSL Object Services ESQL “ select o from orders” LINQ to Entities “ from o in orders...” ADO.NET Data services Provider Provider Provider SSDL Custom Interceptors (Query, Update) Service Operations (Methods) Entity Data Model

RE presentational S tate T ransfer Server-side resources identified by a URI Access is over HTTP, verb tied to action GET to read the value of a resource POST to create a new resource PUT to update an existing resource DELETE to delete a resource Returned data is “plain” – XML or JSON Is this “the death of SOAP”?

RE presentational S tate T ransfer

Server-side resources identified by a URI

Access is over HTTP, verb tied to action

GET to read the value of a resource

POST to create a new resource

PUT to update an existing resource

DELETE to delete a resource

Returned data is “plain” – XML or JSON

Is this “the death of SOAP”?