SQL Server 2012
39th Autoexec Event 27/4/2012, Athens
sp_who
Solution Architect - Principal Consultant - SQL Server Evangelist

1982 >The first contact with computers.
1988 > I...
Connect with me
“ blog”

@antoniosch

sqlschoolgr
.wordpress.com

help@sqlschool.gr

http://sqlschool.gr
History Lesson
Installation &
Configuration
Editions
Principal Editions

Enterprise Edition
Standard Edition
Business Intelligence Edition

Specialized Editions
Web E...
Core-Based Licensing
1 CPU ( 2 Cores) -> Minimum (4 cores/CPU)
1 CPU (4 Cores) -> 4 cores/CPU
1 CPU (6 Cores) -> 6 cores/C...
Installation Requirements
Hardware

Software

1 GB RAM

IE 7

2.0 GHz CPU
2,5 GB on HD

Windows PowerShell 2.0
.NET Framew...
New Installation Features
Product Update
Server Core Installation
Data Quality Services
Distributed Relay

Multi-subnet cl...
New “Product Update” dialog
New inputs
New common line parameters
UpdateSource: Where to search for updates
• MU: Microsoft update
• UNCPath (network ...
Upgrade Path
All Editions from SQL Server 2005 can be upgraded direct to
SQL Server 2012 except SQL Server 2000.
Use Upgra...
Post Upgrade Tasks
Re-register servers
Re-populate full text catalogs
Run DBCC UPDATEUDAGE on all databases to correct any...
SQL Service Startup Parameters
Availability
What’s New
AlwaysOn SQL Server Failover Cluster Instances
Multi-subnet failover clusters
Flexible failover policy for clus...
AlwaysOn Solution
Availability Groups

Failover Cluster Instances

Non-Shared Storage

Shared Storage

Database Level HA
P...
Failover Clustering over Stretched V-LAN
SQL Server 2008 R2 and below

V-LAN
Network Name: SqlClus
IP: 10.10.10.10
subnet
...
Multi-subnet Clustering
Corpnet
Network Name: SqlClus

IP1: 10.168.0.10

OR

IP2: 192.168.0.10

subnet
1

Local Site

SAN ...
Configure New IP Address when AddNode
Multi-Subnet Cluster Properties
Multi-Subnet Clustering Requirements
SQL SKU: Enterprise Edition
OS version: Windows Server 2008 R2 +
SAN replication for ...
Indirect Checkpoints
Previously checkpoints on ?????? intervals
Variance in failover time
Variance in IO load

New in SQL ...
Current Algorithm: Dirty Pages
Algorithm

Buffer Pool

1. Checkpoint starts
2. FlushCache() visits all pages and writes ea...
Indirect Checkpoint: Dirty Pages
Algorithm

Buffer Pool
1.

1, 100

2.

…
10, 111

3.

…
20, 108
…

New structure links di...
Flexible Failover Policy - Configuration
HealthCheckTimeout
Default: 60 sec
Min: 15 sec
Frequency of responses

FailureCon...
Flexible Failover Policy FailureConditionLevels
5 – Failover/restart on any qualified
failure conditions

4 – Failover or ...
AlwaysOn
A deep dive into Availability Groups
Mission Critical High Availability Solution
Meets mission
critical high
availability SLA

Integrated

Flexible

Efficient
AlwaysOn Availability Groups
A new feature that enhances and combines database
mirroring and log shipping capabilities
•
•...
Starting Topology
Database Mirroring

Log Shipping
New Topology Phase 1

A
A

A
New Topology Phase 2

A
A

A

A

Reports
Backups
Synchronous
Data Movement

Asynchcronous
Data
Movement
Additional Topology Examples
AlwaysOn provides the flexibility of different HA
configurations
A
A
A

A

A

A
A

Direct att...
New Topology Benefits
• Better SLAs
• Multiple no data loss secondaries
• Better data loss protection for DR secondaries t...
Windows Server Pre-Reqs
• KB 976097
• Supports SQL Server Failover Cluster Instances with AlwaysOn Availability
Groups

• ...
Quorum Configuration
• Quorum: need majority of votes to operate and avoid split brain

• Two-Steps process:
1.

Select no...
Active Secondary
Offloading Backup
Database Mirroring Backups
R/W workload

Failed

Backups

Backups
Primary

Secondary

SQL 2008 Database Mirroring
Enabling Backup On Secondary
R/W workload

Backups
Secondary

Backups
Backups

Primary
Secondary
Restrictions, cautions, and gotchas
Differential backups are not supported on secondary
Only Copy-only full backups are su...
Distributed Replay
What is Distributed Replay?
Multi-client scalability to drive higher throughput
Higher workload replay fidelity
Useful for...
Why an enhanced replay tool?
Use multiple low-cost clients (workstations) to handle large
workload traces within reasonabl...
Distributed Replay Data & Workflow
Batch Request

1 Preprocess

Batch Request

Batch Request

User

Controller
2 Replay

…...
Distributed Replay Concepts
Connection 51

Connection 52
Trace Start

Connect
Time

Connect
Time

Login

Connect Time = de...
Preprocess & Replay Steps
•

What Happens During Preprocess:
•
•
•
•

•

Sort the events in ascending order of EventSequen...
Preprocess Options
•
•

IncSystemSession: Whether system session events are filtered out
MaxIdleTime: cap max idle time be...
Replay Options for Sequence Control
Synchronization
Mode
Submit order

Event submit
ordering across
SPIDs

Submit timing

...
Supported SQL Server versions
Input Trace File Version

Target SQL Server

SQL Server 2005

SQL Server 2008 / 2008 R2 / 20...
Performance & Scalability
Security Enhancements
SQL Server 2008 Security Recap

ENSURE
COMPLIANCE

CONTROL
ACCESS

PROTECT
DATA

Customer challenges

Security feature

Pr...
The SQL Server 2008 Security Story
Default Schema for Groups
Default schema =
schema1

Group1

• Can now assign default schema to a group
• Eases Administrat...
User-Defined Server Roles
• Server-level principal
• Administrator defined "server
group"

DBARole

• Collection of princi...
Database Authentication
Available in Contained Databases
Allow authentication without Logins
SQL Users with passwords
Wind...
Database Auth – SQL Users
User=Alice; Pwd; IC=NormalDB

User=Alice; Pwd; IC=CDB
(Contained user Alice exists)

User=Alice;...
Database Auth – Windows Users
User=DomainAlice; IC=NormalDB

Login

User=DomainAlice; IC=CDB

Login

(Login Alice exists)
...
Crypto Changes
• CREATE CERTIFICATE FROM BYTES
• 4K certificates supported for import
• SMK/DMK default to AES256
• Key ba...
Audit Enhancements
Audit Supported on All SKUs
• Basic Audit on all SKUs
• Server Audit Specs only
• DB Audit Specs for Enterprise and
Datace...
Improved Resilience
• Before:
• Write failures may silently lose Audit records
• Use ON_FAILURE = SHUTDOWN

• Now:
• Autom...
T-SQL Stack Information
exec hr.viewsalary

select salary from
hr.payroll
hr.viewsalary

hr.payroll

Audit Log
User-Defined Audit Event
• sp_audit_write( )
exec sp_audit_write
1234,
1,
N‘Hello World’

@user_defined_event_id
@succeede...
Record Filtering
CREATE SERVER AUDIT audit_name
TO { [ FILE (<file_options> [ , ...n ]) ] | APPLICATION_LOG |
SECURITY_LOG...
Management
Enchancments
Backup - Restore
Backup Timeline
Page Restore Window
Server Related DMVs
sys.dm_server_services
sys.dm_server_registry
sys.dm_server_memory_dumps
Other Enhacements
Scalability & Performance
Columnstore Indexes
Online Index operations
Partition Support Increased (15.000 instead of 1.000...
Programmability
Filetables

Statistical Semantic Search
Full-Text Search – GREEK

Support!!!!

New and Enhanced Spatial fe...
Ad-hoc Query Paging Implementation
• OFFSET
• Ορίζει τον αριθμό των records που θα αγνοηθούν πριν
ξεκινήσει το query να επ...
Support for UTF-16
• Introducing _SC collations
• Common Unicode characters occupy 16-bits
each (NCHAR / NVARCHAR)

• Rare...
Sequences
• New Database Object, similar to the IDENTITY property
• Separates number-generation from column and table

• A...
Metadata Discovery
•

Ο παλιός τρόπος που όμως θα καταργηθεί και δεν μου έδινε και πολλά
USE AdventureWorks2008R2;
GO
SET ...
SSDT
SQL Server Data Tools
Έχει και άλλα…

Αντέχουμε;;;;;;;;;;;;;;;;;;;;;;
Looking ahead
Σας
ευχαριστώ
ROCKING WITH KNOWLEDGE IN SQL SERVER
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Sql server 2012 autoexec event no 39

  1. 1. SQL Server 2012 39th Autoexec Event 27/4/2012, Athens
  2. 2. sp_who Solution Architect - Principal Consultant - SQL Server Evangelist 1982 >The first contact with computers. 1988 > I started my professional carrier in IT, especially in software development. 1998 > I earned my 1st Certification as MCSD (3rd in Greece). Since then I certified as MCP, MCSD, MCT, MCDBA, MCAD, MCTS, MCITP, MCPD, MCSA, OCA. 1999 > I started my Trainer carrier as MCT. Since then I have more than 14.000 hours of training 2010 > I became for first time Microsoft MVP on SQL Server. Leader of IAMCT Europe Greek Chapter Moderator of autoexec.gr Member of the dotNETZone.gr
  3. 3. Connect with me “ blog” @antoniosch sqlschoolgr .wordpress.com help@sqlschool.gr http://sqlschool.gr
  4. 4. History Lesson
  5. 5. Installation & Configuration
  6. 6. Editions Principal Editions Enterprise Edition Standard Edition Business Intelligence Edition Specialized Editions Web Edition Breadth Edition Developer Edition Express Edition
  7. 7. Core-Based Licensing 1 CPU ( 2 Cores) -> Minimum (4 cores/CPU) 1 CPU (4 Cores) -> 4 cores/CPU 1 CPU (6 Cores) -> 6 cores/CPU 1 CPU (8 Cores) -> 8 cores/CPU 2 CPU (2 Cores) -> Minimum (4 cores/CPU) X 2 = 8 cores 2 CPU (4 Cores) -> (4 cores/CPU) X 2 = 8 cores 2 CPU (6 Cores) -> (6 cores/CPU) X 2 = 12 cores 2 CPU (8 Cores) -> (8 cores/CPU) X 2 = 16 cores
  8. 8. Installation Requirements Hardware Software 1 GB RAM IE 7 2.0 GHz CPU 2,5 GB on HD Windows PowerShell 2.0 .NET Framework 4.0 .NET Framework 3.5 SP1 on Vista & Server 2008
  9. 9. New Installation Features Product Update Server Core Installation Data Quality Services Distributed Relay Multi-subnet clustering System Databases can be installed on file share on an Server Message Block (SMB) file server.
  10. 10. New “Product Update” dialog
  11. 11. New inputs New common line parameters UpdateSource: Where to search for updates • MU: Microsoft update • UNCPath (network share) or local folder UpdateEnabled • True/False: turns feature on or off For example: Setup.exe /Action=Install /UpdateSource=U:DenaliCTP3b
  12. 12. Upgrade Path All Editions from SQL Server 2005 can be upgraded direct to SQL Server 2012 except SQL Server 2000. Use Upgrade Advisor utility. Use Distributed Replay utility.
  13. 13. Post Upgrade Tasks Re-register servers Re-populate full text catalogs Run DBCC UPDATEUDAGE on all databases to correct any incorrect row or page counts. Validate on remove USE PLAN hints that are generated by SQL Server 2005 and applied to queries on partitioned tables and indexes Update Statistics on all databases. Special consideration for Replicated databases (BOL)
  14. 14. SQL Service Startup Parameters
  15. 15. Availability
  16. 16. What’s New AlwaysOn SQL Server Failover Cluster Instances Multi-subnet failover clusters Flexible failover policy for clusters health detection Indirect checkpoints AlwaysOn Availability Groups Online Operations Extended support for online index builds (LOB, XML data types) Reduced downtime for application upgrade (less than a second an exclusive lock held)
  17. 17. AlwaysOn Solution Availability Groups Failover Cluster Instances Non-Shared Storage Shared Storage Database Level HA Protection Instance Level HA Protection Active Secondaries
  18. 18. Failover Clustering over Stretched V-LAN SQL Server 2008 R2 and below V-LAN Network Name: SqlClus IP: 10.10.10.10 subnet 1 Local Site SAN Replication subnet 2 Remote Site
  19. 19. Multi-subnet Clustering Corpnet Network Name: SqlClus IP1: 10.168.0.10 OR IP2: 192.168.0.10 subnet 1 Local Site SAN Replication subnet 2 Remote Site
  20. 20. Configure New IP Address when AddNode
  21. 21. Multi-Subnet Cluster Properties
  22. 22. Multi-Subnet Clustering Requirements SQL SKU: Enterprise Edition OS version: Windows Server 2008 R2 + SAN replication for cross-site DR (e.g. EMC SRDF) Single AD domain for all nodes
  23. 23. Indirect Checkpoints Previously checkpoints on ?????? intervals Variance in failover time Variance in IO load New in SQL Server 2012 Background checkpointing over time Smoother IO load More predicable failover times Configurable per database Off-by-default for backcompat
  24. 24. Current Algorithm: Dirty Pages Algorithm Buffer Pool 1. Checkpoint starts 2. FlushCache() visits all pages and writes each dirty page: P10, P20, P30, P40 in that order 3. FlushCache() order has nothing to do with log order 4. MinRecLSN must be == begin checkpoint LSN 1, 100 … 10, 111 … 20, 108 … 30, 112 … 40, 110 40 30 40 30 20 30 40 40 20 10 40 10 30 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 11 0 11 1 11 2 Log Order
  25. 25. Indirect Checkpoint: Dirty Pages Algorithm Buffer Pool 1. 1, 100 2. … 10, 111 3. … 20, 108 … New structure links dirtied buffers in the order they are first dirtied. Checkpoint can write buffers in that order: • Writing page 40 covers log up to < LSN 101. Writing page 30 next covers up to < LSN 104. Writing page 20 next covers log up to < 109. MinRecLSN can advance independently of checkpoint Dirtied buffers with “first dirtied LSN” 40, 100 30, 101 20, 104 10, 109 … 30, 112 … 40, 110 40 30 40 30 20 30 40 40 20 10 40 10 30 10 0 10 1 10 2 10 3 10 4 10 5 10 6 10 7 10 8 10 9 11 0 11 1 11 2 Log Order
  26. 26. Flexible Failover Policy - Configuration HealthCheckTimeout Default: 60 sec Min: 15 sec Frequency of responses FailureConditionLevel Default Level: 3 “Failover or restart on critical SQL Server errors” User configurable Diagnostics always captured
  27. 27. Flexible Failover Policy FailureConditionLevels 5 – Failover/restart on any qualified failure conditions 4 – Failover or restart on moderate SQL Server errors 3 – Failover or restart on critical SQL Server errors 2 – Failover or restart on server unresponsive 1 – Failover or restart on server down 0 – No Automatic Failover or restart Query Processing errors Resource errors System errors No response from sp_server_diagnostics Service is down
  28. 28. AlwaysOn A deep dive into Availability Groups
  29. 29. Mission Critical High Availability Solution Meets mission critical high availability SLA Integrated Flexible Efficient
  30. 30. AlwaysOn Availability Groups A new feature that enhances and combines database mirroring and log shipping capabilities • • Multi-database failover Multiple secondaries • • • • • • • • Total of 4 secondaries 2 synchronous secondaries • 1 automatic failover pair Synchronous and asynchronous data movement Built in compression and encryption Automatic and manual failover Flexible failover policy Automatic Page Repair Efficient Integrated Flexible • • • • • • • Application failover using virtual name Configuration Wizard Dashboard System Center Integration Rich diagnostic infrastructure File-stream replication Replication publisher failover Active Secondary • • Readable Secondary • Backup from Secondary • Automation using power-shell
  31. 31. Starting Topology Database Mirroring Log Shipping
  32. 32. New Topology Phase 1 A A A
  33. 33. New Topology Phase 2 A A A A Reports Backups Synchronous Data Movement Asynchcronous Data Movement
  34. 34. Additional Topology Examples AlwaysOn provides the flexibility of different HA configurations A A A A A A A Direct attached storage local, regional and geo secondaries Synchronous Data Movement Asynchcronous Data Movement Shared Storage, regional and geo secondaries
  35. 35. New Topology Benefits • Better SLAs • Multiple no data loss secondaries • Better data loss protection for DR secondaries through continuous replication • Faster failover to DR secondaries through virtual name failover • Easier deployment/management • • • • • • Unified solution Simple deployment Unified dashboard Rich diagnostics Centralized management of client connection topology Multi-DB failover
  36. 36. Windows Server Pre-Reqs • KB 976097 • Supports SQL Server Failover Cluster Instances with AlwaysOn Availability Groups • KB 2494036 • Supports configuring optimal quorum with non-automatic failover targets • All nodes should be in the same AD domain • To create WFSC cluster user running creation must have: • • • • Domain account Administrator on all machines Have Create Computer objects and Read All Properties rights in AD Detailed Article: http://technet.microsoft.com/enus/library/cc731002(WS.10).aspx
  37. 37. Quorum Configuration • Quorum: need majority of votes to operate and avoid split brain • Two-Steps process: 1. Select nodes to vote (KB 2494036) • 1 vote if node’s that host a replica that is currently: • • Primary (if primary is an FCI include all possible owner nodes for that FCI) An auto failover target if the primary is also configured for auto failover • 0 votes for rest of nodes 2. Select the quorum type: • Odd number of votes, use “Node Majority” • Even number of votes, add a witness by either: • • Adding an additional witness node and use “Node Majority” Using “Node and File Share Majority” with a protected file share (blog with details) • Re-evaluate and adjust quorum after manual failover outside automatic target
  38. 38. Active Secondary Offloading Backup
  39. 39. Database Mirroring Backups R/W workload Failed Backups Backups Primary Secondary SQL 2008 Database Mirroring
  40. 40. Enabling Backup On Secondary R/W workload Backups Secondary Backups Backups Primary Secondary
  41. 41. Restrictions, cautions, and gotchas Differential backups are not supported on secondary Only Copy-only full backups are supported on secondary The only distinction is the differential bitmap clearing Advisable for backups to be stored centrally
  42. 42. Distributed Replay
  43. 43. What is Distributed Replay? Multi-client scalability to drive higher throughput Higher workload replay fidelity Useful for stress testing production workload or performing application compatibility testing before upgrades
  44. 44. Why an enhanced replay tool? Use multiple low-cost clients (workstations) to handle large workload traces within reasonable time Address limitations of current SQL Trace based tools (Profiler, Upgrade Assistant) Provide enhanced features Lay groundwork for future workload replay capabilities
  45. 45. Distributed Replay Data & Workflow Batch Request 1 Preprocess Batch Request Batch Request User Controller 2 Replay … SQL Server Batch Request Multiple Replay Clients
  46. 46. Distributed Replay Concepts Connection 51 Connection 52 Trace Start Connect Time Connect Time Login Connect Time = delta time between trace start and login Think Time = delta time between two events on the same connection Think Time Login 1 2 3 Think Time 4 5 Logout Logout
  47. 47. Preprocess & Replay Steps • What Happens During Preprocess: • • • • • Sort the events in ascending order of EventSequence Trim away events and columns not used for replay Generate an intermediate file Goal: preprocess the trace once, and intermediate file can be replayed with different options What Happens During Replay: • User specified the replay options, including which clients to use • Shred the intermediate file into chunks in a load-balanced fashion • Dispatch the file chunks to the clients • Two replay modes, stress and synchronization • • Under stress mode, each client sends request independently Under sync mode, client needs to coordinate with controller to know when a specific event can be released (this is optimized so it is not done for every single event)
  48. 48. Preprocess Options • • IncSystemSession: Whether system session events are filtered out MaxIdleTime: cap max idle time between events
  49. 49. Replay Options for Sequence Control Synchronization Mode Submit order Event submit ordering across SPIDs Submit timing Submit time synchronization When to use High-fidelity replay mode, such as functional runs Stress Mode StressScaleGranularity = SPID Event submit ordering within SPIDS StressScaleGranularity = Connection Event submit ordering within connections ConnectTimeScale (0%–100%) ThinkTimeScale (0%–100%) UseConnectionPooling (Yes | No) Use 100% connect time scale and 100% think time scale for performance runs. Use SPID granularity and reduce connect time scale and think time scale for moderate-stress runs. Use Connection granularity and reduce connect time scale and think time scale for high-stress runs.
  50. 50. Supported SQL Server versions Input Trace File Version Target SQL Server SQL Server 2005 SQL Server 2008 / 2008 R2 / 2012 SQL Server 2008 SQL Server 2008 / 2008 R2 / 2012 SQL Server 2008 R2 SQL Server 2008 R2 / 2012 SQL Server 2012 SQL Server 2012
  51. 51. Performance & Scalability
  52. 52. Security Enhancements
  53. 53. SQL Server 2008 Security Recap ENSURE COMPLIANCE CONTROL ACCESS PROTECT DATA Customer challenges Security feature Protect data-at-rest Transparent Data Encryption Data/Key separation Extensible Key Managements Use strong authentication Monitor all activity Kerberos authentication enhancements SQL Server Audit Detect non-compliant configurations Policy-Based Management Industry Certification Common Criteria Certification (EAL4+) Change Data Capture
  54. 54. The SQL Server 2008 Security Story
  55. 55. Default Schema for Groups Default schema = schema1 Group1 • Can now assign default schema to a group • Eases Administration • Avoids implicit schema creation • Reduces chances of wrong schema used in queries
  56. 56. User-Defined Server Roles • Server-level principal • Administrator defined "server group" DBARole • Collection of principals • Holds permissions • Compared to fixed roles • Securable class • Permission set can change • Increase flexibility, manageability and facilitate compliance CONTROL SERVER ALTER ANY LOGIN
  57. 57. Database Authentication Available in Contained Databases Allow authentication without Logins SQL Users with passwords Windows authentication without Login Easier deployment for some applications Tightly scoped security boundary
  58. 58. Database Auth – SQL Users User=Alice; Pwd; IC=NormalDB User=Alice; Pwd; IC=CDB (Contained user Alice exists) User=Alice; Pwd; IC=CDB (Contained user Alice does not exist) Login Contained User Login
  59. 59. Database Auth – Windows Users User=DomainAlice; IC=NormalDB Login User=DomainAlice; IC=CDB Login (Login Alice exists) User=DomainAlice; IC=CDB (Login Alice does not exist) Contained User
  60. 60. Crypto Changes • CREATE CERTIFICATE FROM BYTES • 4K certificates supported for import • SMK/DMK default to AES256 • Key backups encrypted with AES256 • SHA2 (256 and 512) support • Password hashes use SHA512 • RC4 deprecated
  61. 61. Audit Enhancements
  62. 62. Audit Supported on All SKUs • Basic Audit on all SKUs • Server Audit Specs only • DB Audit Specs for Enterprise and Datacenter • No longer need SQLTrace • Enjoy advantages of Audit • • • • Performance Multiple Audits and multiple targets Persist state Audit Resilience SQL Server Express
  63. 63. Improved Resilience • Before: • Write failures may silently lose Audit records • Use ON_FAILURE = SHUTDOWN • Now: • Automatically recover from most file or network errors • Added “ON_FAILURE = FAIL_OPERATION” • Added “MAX_FILES” option Select… Rollback
  64. 64. T-SQL Stack Information exec hr.viewsalary select salary from hr.payroll hr.viewsalary hr.payroll Audit Log
  65. 65. User-Defined Audit Event • sp_audit_write( ) exec sp_audit_write 1234, 1, N‘Hello World’ @user_defined_event_id @succeeded @user_defined_info Audit Log
  66. 66. Record Filtering CREATE SERVER AUDIT audit_name TO { [ FILE (<file_options> [ , ...n ]) ] | APPLICATION_LOG | SECURITY_LOG } [ WITH ( <audit_options> [ , ...n ] ) ] [ FILTER = <predicate_expression> ] } … <predicate_expression> ::= { [ NOT ] <predicate_factor> | {( <predicate_expression> ) } [ { AND | OR } [ NOT ] { <predicate_factor> | ( <predicate_expression> ) } ] [ ,...n ] } • Tightly constrain info written to Audit log ● Audit record generated but not written • Leverages Xevent filtering
  67. 67. Management Enchancments
  68. 68. Backup - Restore Backup Timeline Page Restore Window
  69. 69. Server Related DMVs sys.dm_server_services sys.dm_server_registry sys.dm_server_memory_dumps
  70. 70. Other Enhacements
  71. 71. Scalability & Performance Columnstore Indexes Online Index operations Partition Support Increased (15.000 instead of 1.000) Filestream filegroups can contain multiple files
  72. 72. Programmability Filetables Statistical Semantic Search Full-Text Search – GREEK Support!!!! New and Enhanced Spatial features Metadata Discovery Execute Statement UTF-16 Support Ad-hoc Query Paging Implementation Sequence Objects Throw statement 14 new functions
  73. 73. Ad-hoc Query Paging Implementation • OFFSET • Ορίζει τον αριθμό των records που θα αγνοηθούν πριν ξεκινήσει το query να επιστρέψει αποτέλεσμα. • FETCH • Ορίζει τον αριθμό των records που θα επιστραφούν μετά από τον ορισμό του OFFSET SELECT DepartmentID, Name, GroupName FROM HumanResources.Department ORDER BY DepartmentID OFFSET 5 ROWS FETCH NEXT 10 ROWS ONLY;
  74. 74. Support for UTF-16 • Introducing _SC collations • Common Unicode characters occupy 16-bits each (NCHAR / NVARCHAR) • Rarer Unicode characters occupy 2 x 16-bits each • “Supplementary Characters”, “Surrogate Pairs” • Ancient scripts; Music Notation; Math Symbols etc.
  75. 75. Sequences • New Database Object, similar to the IDENTITY property • Separates number-generation from column and table • ANSI standard compliant implementation CREATE SEQUENCE MySchema.IdSequence AS INT START WITH 10000 INCREMENT BY 1; GO INSERT INTO Employees (EmployeeId, Name) VALUES (NEXT VALUE FOR MySchema.IdSequence, 'Jane'); INSERT INTO Contractors (ContractorId, Name) VALUES (NEXT VALUE FOR MySchema.IdSequence, 'John');
  76. 76. Metadata Discovery • Ο παλιός τρόπος που όμως θα καταργηθεί και δεν μου έδινε και πολλά USE AdventureWorks2008R2; GO SET FMTONLY ON; GO SELECT * FROM HumanResources.Employee; GO SET FMTONLY OFF; GO • sp_describe_first_result_set • sp_describe_undeclared_parameters • sys.dm_exec_describe_first_result
  77. 77. SSDT SQL Server Data Tools
  78. 78. Έχει και άλλα… Αντέχουμε;;;;;;;;;;;;;;;;;;;;;;
  79. 79. Looking ahead
  80. 80. Σας ευχαριστώ
  81. 81. ROCKING WITH KNOWLEDGE IN SQL SERVER

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