SQL Server 2008 for .NET Developers Lynn Langit – Developer Evangelist – Microsoft http://blogs.msdn.com/SoCalDevGal

Lynn Langit – Developer Evangelist – Microsoft

http://blogs.msdn.com/SoCalDevGal

What Will We cover? SQL Server Spatial support BLOB storage (Filestream) T-SQL Enhancements Table-valued parameters New date / time More Visual Studio integration SQL CLR Business Intelligence Reporting Services More

SQL Server Spatial support

BLOB storage (Filestream)

T-SQL Enhancements

Table-valued parameters

New date / time

More

Visual Studio integration

SQL CLR

Business Intelligence

Reporting Services

More

What is Spatial Data? Location-based questions Which roads intersect property or each other? How many stores/restaurants/houses/car dealerships are located within a geographical area? Spatial Data Types Geometry Flat Earth model & X, Y coordinates Geography Round Earth model uses Latitude and Longitude coordinates Can span only one logical hemisphere (more will throw exception) Query for location info as any SQL Server data type Data types dictated by OpenGIS standard New spatial index type

Location-based questions

Which roads intersect property or each other?

How many stores/restaurants/houses/car dealerships are located within a geographical area?

Spatial Data Types

Geometry

Flat Earth model & X, Y coordinates

Geography

Round Earth model uses Latitude and Longitude coordinates

Can span only one logical hemisphere (more will throw exception)

Query for location info as any SQL Server data type

Data types dictated by OpenGIS standard

New spatial index type

Representing Spatial Data Geospatial data in SQL Server Stored in proprietary binary format Can be input using simple text Parse methods convert text into internal storage format Represents areas using Points, Linestrings, Polygons MultiPoints, MultiLinestrings, MultiPolygons GeomCollections Define Polygons in counter-clockwise direction Interior areas (“holes”) must be defined in clockwise direction Supports various calculations and methods Spatial Reference ID (SRID) identifies ellipsoid (flat/round, meters/feet) Only instances with like SRID can be directly compared

Geospatial data in SQL Server

Stored in proprietary binary format

Can be input using simple text

Parse methods convert text into internal storage format

Represents areas using

Points, Linestrings, Polygons

MultiPoints, MultiLinestrings, MultiPolygons

GeomCollections

Define Polygons in counter-clockwise direction

Interior areas (“holes”) must be defined in clockwise direction

Supports various calculations and methods

Spatial Reference ID (SRID) identifies ellipsoid (flat/round, meters/feet)

Only instances with like SRID can be directly compared

SQL Server Geospatial and Virtual Earth

About BLOBs 1. Old way #1 Store BLOBs in DB as varbinary (max) up to 2 GB each Easier management, but can be poor performance 2. Old way # 2 Store BLOBS in File system, path (link) in db Good performance, but complex management 3. New way Best of both via Filestream attribute Applied to varbinary(max) data type Integrated database security Uses dedicated Filegroup (easier maintenance) Limits *no snapshots or mirroring and more

1. Old way #1

Store BLOBs in DB as varbinary (max) up to 2 GB each

Easier management, but can be poor performance

2. Old way # 2

Store BLOBS in File system, path (link) in db

Good performance, but complex management

3. New way

Best of both via Filestream attribute

Applied to varbinary(max) data type

Integrated database security

Uses dedicated Filegroup (easier maintenance)

Limits *no snapshots or mirroring and more

Using Filestream 1. Enable Filestream for the machine For T-SQL access For file I/O streaming access Name of share for storage For streaming remote clients Required integrated security 2. Enable Filestream for the server instance sp_configure filestream_access_level, (0, 1, 2) Can limit to T-SQL access only (option 1) 3. Create Filestream-enabled database FILEGROUP FgName CONTAINS FILESTREAM (NAME = …) Name is the directory (storage) name Name (i.e. folder) must NOT exist prior to creating DB Create table with Filestream column(s) With specific requirements, next slide>>

1. Enable Filestream for the machine

For T-SQL access

For file I/O streaming access

Name of share for storage

For streaming remote clients

Required integrated security

2. Enable Filestream for the server instance

sp_configure filestream_access_level, (0, 1, 2)

Can limit to T-SQL access only (option 1)

3. Create Filestream-enabled database

FILEGROUP FgName CONTAINS FILESTREAM (NAME = …)

Name is the directory (storage) name

Name (i.e. folder) must NOT exist prior to creating DB

Create table with Filestream column(s)

With specific requirements, next slide>>

Filestream Columns Tables with Filestream columns must… Contain a Uniqueidentifier column that is Not nullable Uses the ROWGUIDCOL attribute Max one per table Has a unique constraint on it Can have more than ‘Filestream’ column Varbinary(max) with Filestream attribute Will probably have a default value assigned Can be manipulated using T-SQL OpenSqlFilestream function - sample Performance comparison here

Tables with Filestream columns must…

Contain a Uniqueidentifier column that is

Not nullable

Uses the ROWGUIDCOL attribute

Max one per table

Has a unique constraint on it

Can have more than ‘Filestream’ column

Varbinary(max) with Filestream attribute

Will probably have a default value assigned

Can be manipulated using

T-SQL

OpenSqlFilestream function - sample

Performance comparison here

Using Filestream

Enhancements to T-SQL Table Value Parameters New Date/Time types Time zone awareness New MERGE keyword New shorthand notation

Table Value Parameters

New Date/Time types

Time zone awareness

New MERGE keyword

New shorthand notation

Table Value Parameters CREATE TYPE as TABLE Multiple tables inserted/updated within single transaction (MARS-like capability for writing) Can pass strongly-typed arrays to stored proc as single call ADO.NET updated to include support Param type: SqlDbType.Structured Can use PK, Unique, Check constraints Index only for PK or Unique, no stats Can specify the sort order Can NOT use Defaults

CREATE TYPE as TABLE

Multiple tables inserted/updated within single transaction (MARS-like capability for writing)

Can pass strongly-typed arrays to stored proc as single call

ADO.NET updated to include support

Param type: SqlDbType.Structured

Can use PK, Unique, Check constraints

Index only for PK or Unique, no stats

Can specify the sort order

Can NOT use Defaults

When to use TVPs TVPs Pass large number of rows – uses tempdb Results in simpler CRUD stored procs READONLY after initial population Temp table or CTE CTEs – no indexing, in memory (unless out of memory, then in tempdb) Can not pass as param

TVPs

Pass large number of rows – uses tempdb

Results in simpler CRUD stored procs

READONLY after initial population

Temp table or CTE

CTEs – no indexing, in memory (unless out of memory, then in tempdb)

Can not pass as param

T-SQL Enhancements Table Valued Parameters

Dates and Time Several new types added datetime2 date time datetimeoffset New functions added CONVERT SYS* Functions DATEDIFF

Several new types added

datetime2

date

time

datetimeoffset

New functions added

CONVERT

SYS* Functions

DATEDIFF

MERGE Insert, Update, Delete with one keyword Merge two tables, source and target WHEN MATCHED WHEN TARGET NOT MATCHED WHEN SOURCE NOT MATCHED Syntax and use can be complex MERGE syntax from SQL Server BOL

Insert, Update, Delete with one keyword

Merge two tables, source and target

WHEN MATCHED

WHEN TARGET NOT MATCHED

WHEN SOURCE NOT MATCHED

Syntax and use can be complex

MERGE syntax from SQL Server BOL

Shorthand Notation Like .NET languages (C# or Visual Basic .NET) Declare variable & assign value in one line of code Compound assignment, i.e ‘+=‘, etc..

Like .NET languages (C# or Visual Basic .NET)

Declare variable & assign value in one line of code

Compound assignment, i.e ‘+=‘, etc..

T-SQL Enhancements Date/Time, Merge, Shorthand

Visual Studio Integration Enhanced project types Analysis Services Integration Services Reporting Services Entity Framework CLR Integration

Enhanced project types

Analysis Services

Integration Services

Reporting Services

Entity Framework

CLR Integration

Entity Framework Models relational data using entities (OR/M tool) Can model any relational data source for data access (provider may be required) Application-specific domain You can work at a higher level of abstraction Appropriate amount of information returned Lazy-loaded What is an entity? Structurally like an object (noun) Has scalars and relationships Has identity Not tied specifically to SQL Server

Models relational data using entities (OR/M tool)

Can model any relational data source for data access (provider may be required)

Application-specific domain

You can work at a higher level of abstraction

Appropriate amount of information returned

Lazy-loaded

What is an entity?

Structurally like an object (noun)

Has scalars and relationships

Has identity

Not tied specifically to SQL Server

Visual Studio Integration Entity Framework

SQL CLR SQL CLR is “off by default” for security reasons Must activate (instance) then per database to enable Code executes in SQL Server processing stream SQL Server has the ability to execute managed code Stored procedures & Triggers User-defined Types & Aggregates – extended size (up to 2 GB) Regular Functions & Table value functions Use mostly for complex processing Use for Functions or Aggregates Do not use for CRUD operations

SQL CLR is “off by default” for security reasons

Must activate (instance) then per database to enable

Code executes in SQL Server processing stream

SQL Server has the ability to execute managed code

Stored procedures & Triggers

User-defined Types & Aggregates – extended size (up to 2 GB)

Regular Functions & Table value functions

Use mostly for complex processing

Use for Functions or Aggregates

Do not use for CRUD operations

Programming SQL CLR Use Visual Studio templates for SQL CLR constructs Uses Database project type Can be remotely debugged Metadata (attributes) control SQL Server behavior Microsoft.SqlServer.Server.xxx SqlProcedure, SqlFunction, SqlUserDefinedAggregate, SqlTrigger, SqlUserDefinedType, SqlFacet, SqlMethod Microsoft.SqlServer.Server namespace (retrieves/returns data) Very ADO.NET-like, but not ADO.NET Uses SqlContext.Pipe Assign CAS permission set (Safe, External, Unsafe) Use for complex processing, i.e. RegEx parsing, etc…

Use Visual Studio templates for SQL CLR constructs

Uses Database project type

Can be remotely debugged

Metadata (attributes) control SQL Server behavior

Microsoft.SqlServer.Server.xxx

SqlProcedure, SqlFunction, SqlUserDefinedAggregate, SqlTrigger, SqlUserDefinedType, SqlFacet, SqlMethod

Microsoft.SqlServer.Server namespace (retrieves/returns data)

Very ADO.NET-like, but not ADO.NET

Uses SqlContext.Pipe

Assign CAS permission set (Safe, External, Unsafe)

Use for complex processing, i.e. RegEx parsing, etc…

Visual Studio Integration SQL CLR

Business Intelligence SSAS – Analysis Services Date storage and query OLAP cubes or Data Mining Structures BIDS to create SSMS to administer SSIS – Integration Services ETL tool SSRS - Reporting Services Enterprise Reporting BI can use any data source Data Warehousing Data Mining

SSAS – Analysis Services

Date storage and query

OLAP cubes or Data Mining Structures

BIDS to create

SSMS to administer

SSIS – Integration Services

ETL tool

SSRS - Reporting Services

Enterprise Reporting

BI can use any data source

Data Warehousing

Data Mining

Reporting Services SQL Server standard for reporting Managed enterprise reporting Ad-hoc reporting Embedded reporting Web-based reporting Included in SQL Server 2008 Express w/Advanced Services Reports can be formatted in a variety of ways PDF, Word 2007, HTML Reports are exposed via a Web Service Can be integrated with SharePoint Dependency on IIS removed (uses http.sys)

SQL Server standard for reporting

Managed enterprise reporting

Ad-hoc reporting

Embedded reporting

Web-based reporting

Included in SQL Server 2008 Express w/Advanced Services

Reports can be formatted in a variety of ways

PDF, Word 2007, HTML

Reports are exposed via a Web Service

Can be integrated with SharePoint

Dependency on IIS removed (uses http.sys)

Programming Reports Design reports in Visual Studio 2008 SP1 Query for data Assign query results to report Design report style Colors, Fonts, etc… Deploy report Web Service SharePoint Services Wizard available for initial report design – also Report Builder Enhanced configuration and administration tool

Design reports in Visual Studio 2008 SP1

Query for data

Assign query results to report

Design report style

Colors, Fonts, etc…

Deploy report

Web Service

SharePoint Services

Wizard available for initial report design – also Report Builder

Enhanced configuration and administration tool

Visual Studio Integration Reporting Services and more

But there’s more… For Developers Change Data Capture Filtered Indexes Hierarchy ID ( ) Sparse data columns XML Enhancements Integrated Full-Text Search For Administrators Policy-based management Auditing enhancements Transparent Encryption Compression PowerShell integration More…

For Developers

Change Data Capture

Filtered Indexes

Hierarchy ID ( )

Sparse data columns

XML Enhancements

Integrated Full-Text Search

For Administrators

Policy-based management

Auditing enhancements

Transparent Encryption

Compression

PowerShell integration

More…

Microsoft Press Publications Lynn’s blog http://blogs.msdn.com/SoCalDevGal

Get Microsoft Software for FREE For high school and college students - DreamSpark For startup businesses - BizSpark For everyone - Express editions – VS and SQL - here

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For everyone - Express editions – VS and SQL - here