barcode generator in vb.net 2005 SQL and XML in Software

Print QR Code in Software SQL and XML

SQL and XML
QR Code JIS X 0510 Reader In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Create QR Code In None
Using Barcode creation for Software Control to generate, create QR image in Software applications.
Hierarchical vs. tabular structure Natural XML structures are hierarchical, reflecting the hierarchy of elements in most types of documents. (For example, a book contains chapters; chapters contain sections; and sections contain a heading, paragraphs, and figures.) The structures are also flexible and variable. One section may contain five paragraphs and a single figure, the next one three paragraphs and two figures, and the next one six paragraphs and no figures. In contrast, SQL structures are tabular, not hierarchical, and they reflect the records typical of data processing applications. SQL structures are also quite rigid. Every row of a table contains exactly the same columns, in the same order. Each column has the same data type in every row. There are no optional columns; every column must appear in every row. These differences can also cause conflicts when using XML and SQL together. Objects vs. operations The core purpose of the XML is to represent objects. If you take a meaningful piece of XML code and ask What does this represent the answer will be an object: a paragraph, a purchase order, or a customer address, for example. The SQL language has a broader purpose, but most of it is focused on manipulating objects. If you take a meaningful piece of SQL code and ask What does this represent the answer will usually be an operation on an object: creating an object, deleting an object, finding one or more objects, or updating object contents. These differences make the two languages fundamentally complementary in their purpose and use.
Scanning QR Code In None
Using Barcode scanner for Software Control to read, scan read, scan image in Software applications.
QR Code 2d Barcode Drawer In Visual C#
Using Barcode encoder for VS .NET Control to generate, create QR Code JIS X 0510 image in Visual Studio .NET applications.
Elements vs. Attributes
Draw QR Code 2d Barcode In VS .NET
Using Barcode generator for ASP.NET Control to generate, create QR Code JIS X 0510 image in ASP.NET applications.
Printing QR Code In VS .NET
Using Barcode drawer for Visual Studio .NET Control to generate, create QR Code 2d barcode image in VS .NET applications.
The relational model offers only one way to represent data values within the database as values of individual columns within individual rows of a table. The XML document model offers two ways to represent data: Elements An element within an XML document has contents, and the contents can include a data value in the form of text for that element. When represented in this way, the data value is a fundamental part of the XML document hierarchy; the hierarchy is built up from elements. Incidentally, it is the hierarchical tree structure that has led practitioners to use the term forest for a collection of related XML document elements. Often, an element containing a data value will be a leaf node in the XML document tree; that element will be a child of higher-level elements, but it will not itself have any children. This will almost always be true of elements that represent data that comes from a relational database. However, XML does support mixed elements, which contain a combination of text (content) and other subelements. Attributes An element within an XML document may have one or more named attributes, and each attribute has a text value. The attributes are attached to an element within the XML hierarchy, but are not the content of the element. The names of different attributes of an element must be different, so you can t have two attributes with the same name. Also, XML treats the order of the attributes of an element as insignificant; they can appear in any order. This differs from the XML treatment of elements, which have a definite position within an XML document, and where the difference between the first, second, and third child elements of a higher-level element is significant.
QR Code 2d Barcode Maker In VB.NET
Using Barcode generator for .NET Control to generate, create Denso QR Bar Code image in Visual Studio .NET applications.
Code 39 Full ASCII Encoder In None
Using Barcode creation for Software Control to generate, create Code 39 image in Software applications.
PART VI
Bar Code Encoder In None
Using Barcode encoder for Software Control to generate, create bar code image in Software applications.
Creating GTIN - 13 In None
Using Barcode generation for Software Control to generate, create GTIN - 13 image in Software applications.
Part VI:
Print Code128 In None
Using Barcode printer for Software Control to generate, create Code-128 image in Software applications.
Print UPC-A Supplement 5 In None
Using Barcode maker for Software Control to generate, create UPCA image in Software applications.
SQL Today and Tomorrow
I-2/5 Creation In None
Using Barcode encoder for Software Control to generate, create ANSI/AIM ITF 25 image in Software applications.
Drawing 2D Barcode In VB.NET
Using Barcode maker for .NET framework Control to generate, create Matrix 2D Barcode image in VS .NET applications.
The existence of two different ways to represent data in XML means that you have two different legitimate ways to express the contents of a relational database as XML. These two rows of data:
Making Barcode In Visual C#.NET
Using Barcode generator for Visual Studio .NET Control to generate, create barcode image in .NET applications.
Encode Code 3 Of 9 In VB.NET
Using Barcode drawer for .NET framework Control to generate, create USS Code 39 image in .NET framework applications.
ORDER_NUM --------112963 112983 MFR --ACI ACI PRODUCT ------41004 41004 QTY ---28 3 AMOUNT ---------$3,276.00 $702.00
Creating Code39 In Java
Using Barcode drawer for Android Control to generate, create Code 39 image in Android applications.
Generate Code 128 Code Set A In None
Using Barcode maker for Online Control to generate, create Code 128 image in Online applications.
might be represented by this XML document when elements are used to represent column values:
UPC Symbol Maker In .NET Framework
Using Barcode printer for VS .NET Control to generate, create UPC-A image in .NET framework applications.
Scanning Bar Code In Java
Using Barcode reader for Java Control to read, scan read, scan image in Java applications.
< xml version="1.0" > <queryResults> <row> <orderNum>112963</orderNum> <mfr>ACI</mfr> <product>41004</product> <qty>28</qty> <amount>3276.00</amount> </row> <row> <orderNum>112983</orderNum> <mfr>ACI</mfr> <product>41004</product> <qty>3</qty> <amount>702.00</amount> </row> </queryResults>
and would be represented by this XML document when attributes are used:
< xml version="1.0" > <queryResults> <row orderNum="112963" mfr="ACI" product="41004" qty="28" amount="3276.00"> </row> <row orderNum="112983" mfr="ACI" product="41004" qty="3" amount="702.00"> </row> </queryResults>
25:
Copyright © OnBarcode.com . All rights reserved.