By Steven Holzner, Bob Howell
Written for builders who have to wake up to hurry on ADO.NET, this publication covers the ADO.NET item version from begin to end, from database instruments to making facts items, from developing internet companies to constructing multi-tier database purposes. It additionally covers every little thing from home windows types sessions and knowledge binding to making ASP.NET internet functions. greater than a reference booklet, the authors mix own event and most sensible practices with functional how-to wisdom. not like another books, this e-book was once written utilizing the authentic unencumber of visible Studio.NET expert, so all examples and code are absolutely brand new.
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Yet why do VB while c# is simply as effortless and you may write unmanaged inside it. Its only a no brainer with all of the boundaries of VB nonetheless.
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This is a very important step. If we do not create a join, we will get a Cartesian product when we run the query. A Cartesian product is a result that joins every single row from one table with every single row of another, where the number of rows is equal to the product of the number of rows of both tables. Suppose we have a table with 20,000 rows and another table with 500 rows. The Cartesian product of these would be 10,000,000 rows, not exactly what we desire. Chapter 3. NET Database Tools 45 46 Chapter 3.
A bit can only have a value of 1 or 0. Bit columns cannot be used in indexes. If you need to index a true/ false value, use a Char(1) and define it as 1 or 0. • Decimal/Numeric Scaled Integer. Both types mean the same thing. A scaled integer is a whole number plus a fixed number of decimal places. This differs from a floating-point value that is a real number and has no integral value. A scaled integer is an integer with the decimal point arbitrarily moved to the left a set number of places. • Money A numeric with the decimal point set at position 4.
This is because Visual Studio keeps the project on the IIS server. If this is your local machine the default path is C:\InetPub\WWWRoot\ADOBook03-03. If the web site is on a server, then the files are located there. 10, with the References node expanded. 10. NET project. Web. This library contains all of the classes for building a web application. vsdisco This is the Web Services discovery document. This document is used for Universal Description, Discovery and Integration (UDDI) directory services.