sql server 2012 new t sql functions

... at that point. The design of window functions, which we will get to later, often lends itself to better opti- mization than alternative methods of achieving the same thing. What’s important to ... different forms of the same request—say, one with window functions and the other without—can get different perfor- mance? Why is it that an implementation of SQL such as SQL Server, with its T -SQL ... (sets of rows) that serve as its input and returns a table as its output. The output table of one step then becomes the input table for the next step. Figure 1-6 is a ow diagram illustrating...

Ngày tải lên: 16/03/2014, 00:20

... finding it easier to describe those rows that you do not want rather than those that you do want. Solution Describe the rows that you do not want. en use the NOT operator to essentially reverse the ... Writing an IF…THEN…ELSE Statement Problem You want to write an IF…THEN…ELSE statement so that you can control which of two possible code paths is taken. Solution Write your statement using the ... sorted to the bottom. You can see that in the solution results. e NULL value for the Sport-100 Helmet’s end date is at the end of the list for that helmet. 1-15. Sorting by Columns Not Selected Problem You...

Ngày tải lên: 08/03/2014, 16:20

... subsequent use. Solution Utilize the SELECT statement to retrieve data from a table and populate a variable with that data. DECLARE @FirstHireDate DATE, @LastHireDate DATE; SELECT @FirstHireDate ... following three statements that query the JobCandidate table and return the JobCandidate rows that have a non-NULL BusinessEntityID. All three statements return the same rows, but there is a ... Writing an IF…THEN…ELSE Statement Problem You want to write an IF…THEN…ELSE statement so that you can control which of two possible code paths is taken. Solution Write your statement using the...

Ngày tải lên: 24/03/2014, 01:21

Ngày tải lên: 28/04/2014, 17:09

Ngày tải lên: 05/05/2014, 15:06

Ngày tải lên: 06/08/2013, 17:32

Ngày tải lên: 06/08/2013, 17:32

... uses to determine the best plan based on statistics. It’s important to understand how statistics and parameters combine to create execution plans and what you can do to control them. Statistics ... on cost-based optimization, so accurate data distribution statistics are extremely important for the eective use of indexes. Without accurate statistics, SQL Server s built-in query optimizer ... e most interesting things are the stall data, time that users are waiting on dierent I/O operations. First, io_stall_read_ms represents the amount of time in milliseconds that users waiting...

Ngày tải lên: 12/02/2014, 12:20

... not need to understand these subjects in great depth to take advantage of the spatial features of SQL Server 2012, it is important to have a basic understanding of the theory involved so that ... “Yankee Stadium,” constructed a short distance away from the site of the original Yankee Stadium). It was the first three-tiered sports facility to be built in the United States, and one of the ... segments that connect consecutive points are calculated by linear interpolation: each line segment represents the shortest direct route from one Point to the next in the LineString. However, this...

Ngày tải lên: 16/02/2014, 13:20

... encoding="utf-8" ?> <configuration> <startup useLegacyV2RuntimeActivationPolicy="true"> <supportedRuntime version="v4.0" /> </startup> <runtime> <generatePublisherEvidence ... path that points to the database you right-clicked from: Note that the starting path of this window is different from the starting path when you rst launched PowerShell in the second step. ... explore the SQL Server PSDrive, or the SQL Server data store, which PowerShell treats as a series of items. Type cd\. This will change the path to the root of the current drive, which is our SQL Server...

Ngày tải lên: 18/02/2014, 06:20

... select the New SQL Server stand-alone installation or add features to an existing installation item (at the top of the Installation Center); then SQL Server 2012 installation starts. You then ... within SQL Server databases. With SQL Server 2012, there is also the ability to query the database using .NET and LINQ rather than T -SQL. You are then presented with the SQL Server Installation ... of SQL Server actions to the controller. You would install this on each client that you want to partake in the replay. • SQL Client Connectivity SDK: SQL Native Client provides the ability to...

Ngày tải lên: 06/03/2014, 10:20

... to open the tool:  To open the Import and Export Wizard, right-click the database you want to import data from or export data to SQL Server Management Studio and select Tasksd Import Data ... Column Transform and that new col- umn is then available to subsequent transformations or to the destination. You can add multiple Data Flow Tasks onto the Control Flow tab. You’ll notice that after ... the Script Task to do things that the native tasks can t do. Data Flow Elements Once you create a Data Flow Task, the Data Flow tab in SSDT is available to you for design. Just as the Control...

Ngày tải lên: 06/03/2014, 23:20

... one hold important, not-to-be-forgotten information that is directly relevant to the surrounding text. The pencil icon indicates notes, tips, hints, tricks, and asides to the current discussion. As ... DataSetDataProcessing Extension 746 Server Installation 746 Server Security Confi guration 747 WorkStation Installation 748 WorkStation Security Confi guration 748 Testing DataSetDataExtension 749 Summary 753 ftoc.indd ... 189 Headers and Footers 190 Aggregate Functions and Totals 194 Adding Totals to a Table or Matrix Report 196 Creating Report Templates 198 Creating Composite Reports 199 Anatomy of a Textbox 199 Padding...

Ngày tải lên: 14/03/2014, 09:20

... time taking a look at SSMS in more detail. TRY IT OUT: TOURING SQL SERVER MANAGEMENT STUDIO 1. To start up SQL Server Management Studio, select Start ➤ All Programs ➤ Microsoft SQL Server 2012 ... called Transact SQL (T -SQL) . T -SQL is a Microsoft proprietary language, although it is strongly linked to the ANSI-92 SQL standard of the American National Standards Institute (ANSI). The current ... can find SQL Server instances within the network. For the book, switch this service to automatically start. Click Next to continue with the install. www.it-ebooks.info CHAPTER 2  SQL SERVER...

Ngày tải lên: 15/03/2014, 10:20

... files to filegroups and letting SQL Server distribute the data between them, it’s possible to define a horizontal segmentation of data called a partition so that data is divided up between multiple ... write request consist of two read I/Os and two write I/Os. In an OLTP database, all the data modifications are immediately written to the transaction log file as part of the database transaction, ... To do that, you can use the new testing tool added to the latest version, SQL Server Distributed Replay, which is covered at length in Chapter 15. Where to Focus Efforts When you tune a particular...

Ngày tải lên: 17/03/2014, 19:20

... greater than the time taken to reprocess the MOLAP partition in the rst option. The Tabular model offers what are essentially the same two options but with fewer shortcomings than their Multidimensional ... provide tools to help integrate it with the rest of the Microsoft BI stack. http://www.microsoft.com/ bigdata  SQL Server Reporting Services A tool for creating static and semistatic, highly ... broken up into two main groups: products that are part of the SQL Server suite of tools and products that are part of the Ofce group. As of SQL Server 2012, the SQL Server BI-related tools include: ...

Ngày tải lên: 22/03/2014, 09:20

... introduction to the SSDT toolset is complete, and it’s now time to see it in action. The rest of this chapter presents a sample scenario that demonstrates, step-by-step, how to use many of the SSDT ... script and alert you to the problem. Targeting Different Platforms SQL Server Database Projects have a target platform switch that lets you specify the specic SQL Server version that you intend ... Solution Explorer and choose Convert To SQL Server Database Project. Note that this is a one-way upgrade, and that DbPro artifacts that are not yet supported by SSDT (such as data generation...

Ngày tải lên: 23/03/2014, 00:20

... contains a datetime where the date portion is midnight and a ShiftDetails table with a ShiftStartDate that has dates with time portions that are not midnight, and the join needs to be on the ... CASE statement_end_offset WHEN -1 THEN DATALENGTH(dest.text) ELSE qs.statement_end_offset END - deqs.statement_start_offset ) /2 ) + 1 ) as statement_text FROM sys.dm_exec_query_stats deqs CROSS ... deqs.statement_end_offset WHEN -1 THEN DATALENGTH(sdest.[text]) ELSE deqs.statement_end_offset END - deqs.statement_start_offset)/2) + 1) AS SQL_ Statement , deqp.query_plan , deqs.execution_count...

Ngày tải lên: 24/03/2014, 01:21

Ngày tải lên: 28/03/2014, 10:20