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SQL Server 2012

James Fu

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MDAC/WDAC architecture

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MDAC/WDAC Releases

MDAC 2.5 included with the Windows 2000 operating system

MDAC 2.6 included with Microsoft SQL Server 2000 RTM, SP1,

and SP2 MDAC 2.7

included with the Microsoft Windows XP RTM and SP1operating systems

MDAC 2.8 included with Windows Server 2003 and Windows XP

SP2 and later Windows Data Access Components (WDAC)

MDAC changed its name to WDAC - "Windows DataAccess Components" since Windows Vista and

Windows Server 2008

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ADO.NET architecture

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SQL Server Port

Scenario Port

SQL Server default instance running

over TCP

TCP port 1433

Dedicated Admin Connection

TCP port 1434 for the default instance. Other ports are used for named

instances. Check the error log for the port number.

SQL Server Browser service

UDP port 1434

Replication

Replication connections to SQL Server use the typical regular Database Engine

ports (TCP port 1433 for the default instance, etc.)

Web synchronization and FTP/UNC access for replication snapshot require

additional ports to be opened on the firewall. To transfer initial data and schema

from one location to another, replication can use FTP (TCP port 21), or sync over

HTTP (TCP port 80) or File and Print Sharing (TCP port 137,138, or 139).

Transact-SQL debugger

TCP port 135

See Special Considerations for Port 135

The IPsec exception might also be required.

http://msdn.microsoft.com/en-us/library/cc646023.aspxhttp://msdn.microsoft.com/en-us/library/cc646023.aspxhttp://msdn.microsoft.com/en-us/library/cc646023.aspxhttp://msdn.microsoft.com/en-us/library/cc646023.aspx

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Discontinued feature

32-bit Address Windowing Extensions (AWE) and 32-bit Hot Addmemory support

SQL Server Distributed Management Objects (SQL-DMO)

BACKUP { DATABASE | LOG } WITH PASSWORD

RESTORE { DATABASE | LOG } WITH DBO_ONLY 80 ( SQL Server 2000 )Compatibility level

sp_dboption

sp_addserver

SQL Mail Use of *= and =* COMPUTE / COMPUTE BY

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Deprecated feature

Database compatibility level 90

SET ROWCOUNT for INSERT, UPDATE, and DELETE statements

sqlmaint Utility

sp_dbcmptlevel , sp_attach_db , sp_renamedb

sp_change_users_login , sp_adduser

sp_addtype , CREATE DEFAULT , CREATE RULE

BACKUP { DATABASE | LOG } TO TAPE

ANSI_NULLS, ANSI_PADDING and

CONCAT_NULLS_YIELDS_NULL Data types:text , ntext , image

syscolumns , sysfiles , sysobjects ..

Three-part and four-part column references.

SQL Server Profiler for Trace Capture

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New Query & Schema Constructs

Support for Simplified Paging SELECT...ORDER BY ...

OFFSET ROWSFETCH NEXT ROWS ONLY

Support for UTF-16, introducing _SCcollations 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.

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Sequences

New Database Object, similar to the IDENTITYproperty

Separates number-generation from column andtable

ANSI standard compliant implementation

CREATE SEQUENCE MySchema.IdSequence

AS INT

START WITH10000INCREMENT BY 1;

GO

INSERT INTO Employees (EmployeeId, Name)

VALUES (NEXT VALUE FORMySchema.IdSequence,'Jane');

INSERT INTO Contractors (ContractorId, Name)

VALUES (NEXT VALUE FORMySchema.IdSequence, 'John');

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Additional Scalar Functions

New conversion functions for all types: TRY_CONVERT(data_type[(length)], [,style])

TRY_CAST(expression AS data_type[(length)])

New conversion functions to and from strings: FORMAT(value, format [,culture])

PARSE(string_value AS data_type [USING culture])

TRY_PARSE(string_value AS data_type [,USING culture])

Other functions: IIF(boolean expr, true_value, false_value)

CHOOSE(index,val1,val2 [,valN])

CONCAT(val1, val2[,valn])

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Additional Scalar Functions

New date & time related functions: EOMONTH(date [, months_to_add])

DATEFROMPARTS(year, month, day)

TIMEFROMPARTS(hour, minutes, seconds, fractions, scale)

DATETIME2FROMPARTS(year, month, day ,hour, minutes,

seconds, fractions, scale)

DATETIMEFROMPARTS (year, month, day, hour, minutes,

seconds, miliseconds)

SMALLDATETIMEFROMPARTS(year, month, day, hour,

minutes)

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Demo 1

USE TempDB

GOIF OBJECT_ID('Tab1') IS NOT NULL DROP TABLE Tab1

GO

CREATE TABLE Tab1 (Col1 INT)

GO

INSERT INTO Tab1 VALUES(5), (5), (3) , (1)

GO

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LEAD()

-- LEAD

SELECT Col1,

LEAD(Col1) OVER(ORDER BY Col1) AS "LEAD()" FROM Tab1

-- LEAD

SELECT Col1,

LEAD(Col1, 2) OVER(ORDER BY Col1) AS "LEAD()" FROM Tab1

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LAG()

-- LAG

SELECT Col1,

LAG(Col1, 2) OVER(ORDER BY Col1) AS "LAG()" FROM Tab1

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FIRST_VALUE()

-- FIRST_VALUE

SELECT Col1,FIRST_VALUE(Col1) OVER(ORDER BY Col1) AS "FIRST_VALUE()" FROM Tab1

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LAST_VALUE()

-- LAST_VALUE

SELECT Col1,

LAST_VALUE(Col1) OVER(ORDER BY Col1) AS "LAST_VALUE()" FROM Tab1

-- LAST_VALUE

SELECT Col1,

LAST_VALUE(Col1) OVER(ORDER BY Col1 ROWS BETWEEN UNBOUNDEDPRECEDING AND UNBOUNDED FOLLOWING) AS "LAST_VALUE()" FROM Tab1

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Window Frame

OVER (

[ ]

[ ]

[ ]

)

[ROWS | RANGE] BETWEEN AND

Where:

is one of:UNBOUNDED PRECEDING: The window starts in the first row of the partition

CURRENT ROW: The window starts in the current row PRECEDINGor FOLLOWING

is one of:UNBOUNDED FOLLOWING: The window ends in the last row of the partition

CURRENT ROW: The window ends in the current row

PRECEDING orFOLLOWING

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Demo 2

IF OBJECT_ID('tempdb.dbo.#TMP') IS NOT NULL

DROP TABLE #TMP

GO

CREATE TABLE #TMP (ID INT, Col1 CHAR(1), Col2 INT)

GO

INSERT INTO #TMP VALUES(1,'A', 5), (2, 'A', 5), (3, 'B', 5), (4, 'C', 5), (5, 'D', 5)

GO

--SELECT * FROM #TMP

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POF

SELECT *,

SUM(Col2) OVER(ORDER BY Col1 RANGE UNBOUNDED PRECEDING) "Range"

SUM(Col2) OVER(ORDER BY Col1 ROWS UNBOUNDED PRECEDING) "Rows"FROM #TMP

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--

SELECT actid, tranid, val,

SUM(val) OVER(PARTITION BY actid

ORDER BY tranid

ROWS BETWEEN UNBOUNDEDPRECEDING AND CURRENT ROW) AS balance

FROM dbo.Accounts;

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Window partitioning, ordering, framing

Ranking: ROW_NUMBER, NTILE, RANK,DENSE_RANK

Offset: LAG, LEAD, FIRST_VALUE, LAST_VALUE,NTH_VALUE

Distribution: PERCENT_RANK, CUME_DIST,PERCENTILE_CONT, PERCENTILE_DISC

WINDOWwindow frame exclusion,

INTERVAL type

Ordered Set