sql data manipulation language ppt

Ngày tải lên: 21/10/2014, 23:08

... Designing a User Data Management Strategy 3 Determining Current User Data Environment ? ? ? What Is User Data? What Is User Data? ? ? ? Which User Data Is Currently Stored? Which User Data Is Currently ... a User Data Management Strategy    Determining Current User Data Strategies  Determining Current User Data Environment  Determining Current User Data Management Methods Data Users Users ... User Data Currently Stored? Where Is User Data Currently Stored? ? ? ? What Is the Current Use of Offline Data? What Is the Current Use of Offline Data? ? ? ? What Is the Current Use of Roaming Data? What...

Ngày tải lên: 10/12/2013, 15:15

... nature of a data island. ! Describe how to use Data Source Objects (DSO) to display XML data islands in an HTML page. ! Create an XML data island in an HTML file. ! Bind XML data to HTML ... 5: Embedding XML Data in HTML # ## # Using Data in Web Browsers ! Delivering Data from the Web Server ! Using Client-Side Data Source Objects (DSO) ! Presentation vs. Data ! Internet Explorer ... Objects, and DHTML data binding simplify data access and presentation on the Web. Slide Objective To introduce the concept of data access and data- aware Web pages. Lead-in Data access is now...

Ngày tải lên: 10/12/2013, 16:16

... BASED DATA MINING TECHNIQUES The objective of data mining is to extract valuable information from one’s data, to discover the ‘hidden gold’. In Decision Support Management terminology, data mining ... one search for patterns of information in data (Parsaye, 1997). Figure 2: Rule Induction process Data mining techniques are based on data retention and data distillation. Rule induction models ... rule induction data mining. Furthermore, it is examined whether the implementation of the two methodologies may offer a solution to the problem of missing data, in the initial data set. KEYWORDS:...

Ngày tải lên: 11/12/2013, 23:15

... will be stored. All other database objects will refer to the tables in your database for data, whether asking questions of the data or creating reports based on the data. This section covers ... limitation. This is not to say that Access has unlimited data storage capabilities. Every bit of data causes the Access database to grow in file size. An Access database has a file size limitation of 2 gigabytes. ... querying data to get fast results, but it’s important to understand the basics of the relational database concept before pounding away at data. A good understanding of how a relational database...

Ngày tải lên: 13/12/2013, 03:15

... CustomerID = 'ALFKI'; The previous SELECT statement used the SQL standard format for joining tables. With SQL Server, you can also use the JOIN keyword for joining tables. The advantage ... INSERT statement later in this chapter. You don't need to specify the ProductID column because SQL Server will automatically supply a value using an identity. This identity was established when ... way of examining the rows stored in the tables. For example, one of the views of the Northwind database retrieves an alphabetical list of products, and retrieves the product name and category...

Ngày tải lên: 14/12/2013, 13:15

... watermark. 2 Huffman Coding Huffman coding is a popular method for compressing data with variable-length codes. Given a set of data symbols (an alphabet) and their frequencies of occurrence (or, equiv- alently, ... the compressed data on a file, the variance of the code makes no difference. A small-variance Huffman code is preferable only in cases where the encoder transmits the compressed data, as it is being ... starts with a special header indicating mode 1, followed by the length LEN of the data, followed by LEN bytes of literal data. Notice that the maximum value of LEN is 65,535. 2. Compression with fixed...

Ngày tải lên: 14/12/2013, 15:15

... which makes it so useful in data compression, is that it takes correlated input data and concentrates its energy in just the first few transform coefficients. If the input data consists of correlated ... the quantized coefficients. This results in data items that are not identical to the original ones but are not much different. In practical applications, the data to be compressed is partitioned into ... as 3, 4, or 6 result in many small sets of data items. Such a small set is transformed to a small set of coefficients where the energy of the original data is concentrated in a few coefficients, but...

Ngày tải lên: 14/12/2013, 15:15

... for the entire 64-pixel data unit is the 46-bit number 1111111111100111010001001101101110111010101010. These 46 bits encode one color component of the 64 pixels of a data unit. Let’s assume that ... set of basis images that have higher and higher frequencies. Given a data vector, the DCT separates the frequencies in the data and represents the vector as a linear combination (or a weighted sum) ... This version of the DCT is applied to small parts (data blocks) of the image. It is computed by applying the DCT in one dimension to each row of a data block, then to each column of the result. Because...

Ngày tải lên: 14/12/2013, 15:15

... between pixels, 8, 22, 65 da Vinci, Leonardo (1452–1519), 178 data compression (approaches to), 21–58 data hiding (steganography), viii data structures, ix, 81, 273 Daubechies, Ingrid (1954–), 199 decoder, ... nine bits. Since the uncoded data requires just two bits (01 or 10), the compression ratio is 9/2=4.5 (the compressed data is 4.5 times bigger than the original data; a significant expansion). Please ... Statistical data compression methods work by assigning variable- length codes to symbols in the data, with the shorter codes assigned to symbols or groups of symbols that appear more often in the data...

Ngày tải lên: 14/12/2013, 15:15

... view on data, which allows “combining” data from various data sources (SQL Server relational and OLAP data- bases, Oracle, Teradata, DB2, and so on), “defining” relationships between that data, “defining” ... trans- actional databases and ideally does not change previously stored historical data. A subset of a DW is called a data mart. A DW usually contains data from a variety of heterogeneous data sources. Data ... ( ”” ). UDM does not really combine data, but rather creates a metadata (data describing) view. This does not affect the source data itself, but allows creating a metadata view that, for example, may...

Ngày tải lên: 14/12/2013, 16:15

... 11, “Accessing Data. ” Data sources and data sets can be managed in the report data pane inside Report Builder 2.0. After you have created a data source or referenced a shared data source, you ... applied at the database level. After you successfully define a data set, the data set will show up under a tree view in the data pane. Here are the steps to create a basic data source and a data set: 1. ... resources. Shared data sources Securing shared data sources limits access to the data source and its corresponding properties. To view the data source properties, users need the View Data Sources...

Ngày tải lên: 14/12/2013, 16:15

... your implementation (for example, RdceImpl.dll ) to the following: %ProgramFiles%\Microsoft SQL Server\MSSQL.<n>\ReportingServices\Report Server\bin 2. Register your extension in the Report ... “> <IMembershipCondition class=”UrlMembershipCondition” Url=”file://C:\Program Files\Microsoft SQL Server\ ➥MSSQL.2\Reporting Services\ReportServer\bin\RdceImpl.dll” /> </CodeGroup> 5. Enable ... Report Server: . Catalog synchronization: Ability to sync reports from SharePoint Content data- bases to Report Server databases. . Security synchronization: Ability to map SharePoint site and document...

Ngày tải lên: 14/12/2013, 16:15

... the values of the data. That means that we can do all the fitting in advance, for fictitious data consisting of all zeros except for a single 1, and then do the fits on the real data just by taking ... noisy data. The premise of data smoothing is that one is measuring a variable that is both slowly varying and also corrupted by random noise. Then it can sometimes be useful to replace each data ... the FWHM of desired features in the data. (References [3] and [4] give additional practical hints.) Figure 14.8.2 shows the result of smoothing the same noisy data with broader Savitzky-Golay...

Ngày tải lên: 15/12/2013, 04:15

... the data, then items (i) and (ii) are probably worthless. Unfortunately, many practitioners of parameter estimation never proceed beyond item (i). They deem a fit acceptable if a graph of data ... particular data set of x i ’s and y i ’s, we have the intuitive feeling that some parameter sets a 1 a M are very unlikely — those for which the model function y(x) looks nothing like the data — ... Chapters 18–19. 15.1 Least Squares as a Maximum Likelihood Estimator Suppose that we are fitting N data points (x i ,y i )i=1, ,N, to a model that has M adjustable parameters a j ,j=1, ,M. The model...

Ngày tải lên: 15/12/2013, 04:15

... Calculate χ 2 . *q=1.0; if (mwt == 0) { for (i=1;i<=ndata;i++) *chi2 += SQR(y[i]-(*a)-(*b)*x[i]); sigdat=sqrt((*chi2)/(ndata-2)); For unweighted data evaluate typ- ical sig using chi2,andad- just ... *= sigdat; *sigb *= sigdat; } else { for (i=1;i<=ndata;i++) *chi2 += SQR((y[i]-(*a)-(*b)*x[i])/sig[i]); if (ndata>2) *q=gammq(0.5*(ndata-2),0.5*(*chi2)); Equation (15.2.12). } } CITED REFERENCES ... P.R. 1969, Data Reduction and Error Analysis for the Physical Sciences (New York: McGraw-Hill), Chapter 6. 15.3 Straight-Line Data with Errors in Both Coordinates If experimental data are subject...

Ngày tải lên: 15/12/2013, 04:15

Ngày tải lên: 15/12/2013, 04:15

Ngày tải lên: 15/12/2013, 04:15

Ngày tải lên: 15/12/2013, 13:15

Ngày tải lên: 15/12/2013, 13:15