database client technologies and the secrets of ado
Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 1 potx
Ngày tải lên :
13/08/2014, 08:20
... Product in the database Lines 31-33 change the values of the data members in this instance of Product (in the database) Line 35 commits the changes to the database, and line 36 closes the database ... underneath? The capabilities of the various database technologies differ fundamentally from each other, and these differences are reflected in the way that the technologies implement the ODBC API Some databases ... Click the Select button to specify the path and name of the database file Make sure to specify the VCDb.mdb file on your hard disk instead of the one on the CD-ROM The one on the CD is read-only and...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 2 docx
Ngày tải lên :
13/08/2014, 08:20
... to use ADO in your C++ code You can use the ADO header files and import library from the OLE DB SDK You include the ADO header files (adoid.h and adoint.h) in your source and add the ADO import ... from the client application This is the essence of multitier database application development The idea is to take advantage of the power of the relational database servers to reduce the number of ... layer of abstraction that can hide the details of the database design The benefit of this abstraction is that client programs need not know the details of how the various tables and fields in database...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 3 potx
Ngày tải lên :
13/08/2014, 08:20
... when there is some kind of database failure? Relational database servers typically log all the changes to the data The database writes to the log file first and then commits the changes to the database ... uses the DATEPART function to retrieve the week of the year for the OrderDate It names this field Week Line selects (and calculates) the sum of the Price and ShippingAndHandling fields in the ... days Day 8-Utilizing the Capabilities of Database Servers of the Price and ShippingAndHandling fields Lines and specify the tables and the join (Actually, a join with the NewOrders table isn't...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 4 pps
Ngày tải lên :
13/08/2014, 08:20
... 10 -Database Client Technologies and the Secrets of ADO After examining the context of database client technologies and the relationships between them, you will spend some Simpo PDF Merge and ... relates to the other technologies The two database client technologies that will be updated and improved on in the future are OLE DB and ADO ADO offers a good balance of code size, performance, and ... Yourself Database Programming with Visual C++ in 21 days Day 10 -Database Client Technologies and the Secrets of ADO Figure 10.8 : Viewing the type library for the Execute function of the ADO _Connection...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 5 docx
Ngày tải lên :
13/08/2014, 08:21
... exacerbates the need to update all the client software every time is fat client software Fat client software does not refer to software you write for fat clients Rather, a fat client is a piece of software ... small change in the database could necessitate an update of all the instances of ADOMFC1.EXE on the client machines The nature of the connection that ADOMFC1.EXE uses with the database also increases ... nature of a C++ object database and the openness and availability of a relational database Figure 13.2 : The relative openness of object databases and relational databases Some applications lend themselves...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 6 pps
Ngày tải lên :
13/08/2014, 08:21
... future are OLE DB and ADO ADO offers a good balance of code size, performance, and ease of use You can best understand the ADO object model by examining the MSADO15.TLH file and the MSADO15.TLI files, ... Microsoft introduced the DAO API This API was developed as the API for the Microsoft Jet Database engine The Microsoft Jet Database Engine is the database engine for Microsoft Access The Jet Database ... environment handle However, the handle type is HSTMT Remember that the Driver Manager allocates the handle structure and hands this off to the driver whenever the connection to the driver is...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 7 ppsx
Ngày tải lên :
13/08/2014, 08:21
... offset length of the column for the value // in the buffer 122: rgBind[i].obValue = dwOffset + offsetof(COLUMNDATA,bData); 123: // Set the offset length of the column for the length // in the buffer ... rgBind[i].obLength = dwOffset + offsetof (COLUMNDATA,dwLength); 125: // Set the offset length of the column for the status // in the buffer 126: rgBind[i].obStatus = dwOffset + offsetof (COLUMNDATA,wStatus); ... Description The name of the data source The parse name of the data source, used by the ParseDisplayName method to create a moniker The data source description A flag describing the type of the source...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 8 ppt
Ngày tải lên :
13/08/2014, 08:21
... CreateCommand method Obtain access to the ICommandText interface of the Command object Specify the command string Use the Execute method of the Command object to actually run the command Navigate the ... from a table, the name of the field in the resulting row set is the same as the name of the field in the table You can change the name of the field in the resulting row set by using the technique ... in the row buffer The iOrdinal field defines the ordinal position of the field The obValue field defines the buffer offset (the number of bytes from the beginning of the row buffer) to where the...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 9 ppsx
Ngày tải lên :
13/08/2014, 08:21
... interface, the value of the GUID is set to DBGUID_NULL The GetHelpContext and GetHelpFile methods retrieve the name of the help file and help file lookup This information can launch the help viewer and ... later In the Day 18 compendium of the SQL command language, I discussed the use of the GetProperties method of the IDBProperties interface to determine whether the data provider supported the SQL ... takes much processing The dwStatus determines the status of the property Table 20.3 defines the possible values of the dwStatus field and their meanings The colid field defines the column for which...
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Sams Teach Yourself Database Programming with Visual C++ 6 in 21 Days phần 10 potx
Ngày tải lên :
13/08/2014, 08:21
... include the ADO header files (adoid.h and adoint.h) in your source, and add the ADO import library adoid.lib to your linker input This enables you to create instances of the ADO objects and access their ... function call overhead-than the inproc server Day 10, "Database Client Technologies and the Secrets of ADO" Quiz What is the goal or purpose of ODBC? The goal or purpose of ODBC is to provide a uniform ... to support commands The ICommandText interface sets and retrieves the actual command text, which specifies the data source command to execute The Command object requires the ICommandText interface...
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The essence of object oriented programming with java and UML
Ngày tải lên :
22/08/2013, 14:52
... press to get the object to what you need, and what the lights mean about the status of the object The details of how the box is put together inside are irrelevant while you are using the box What ... useful, and will be used in examples throughout this book The various features of the UML will be introduced as needed The Payoff of Objects Object orientation can lead to big payoffs in the software ... Sensor, and have specific values for the attributes described by the class definition The class description includes the means of accessing and changing the state of individual object members of that...
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Tài liệu The Essence of Object-Oriented Programming with Java and UML pptx
Ngày tải lên :
20/12/2013, 21:16
... press to get the object to what you need, and what the lights mean about the status of the object The details of how the box is put together inside are irrelevant while you are using the box What ... useful, and will be used in examples throughout this book The various features of the UML will be introduced as needed The Payoff of Objects Object orientation can lead to big payoffs in the software ... Sensor, and have specific values for the attributes described by the class definition The class description includes the means of accessing and changing the state of individual object members of that...
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Tài liệu Advanced Object Oriented Programming with Visual FoxPro 6.0 ppt
Ngày tải lên :
21/12/2013, 20:15
... another theater at the other end of town Of course, because we're good businessmen, the theater we purchased is modern and already has some software to manage the screens Unfortunately, the software ... of properties and methods It's obvious that most of these objects live within the form So in this case, the form is the container for the other objects What's not so obvious is that some of these ... even break the whole class to access these methods or change the value of these properties Interfaces The sum of the properties and methods that are visible to the outside world is called the object's...
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Tài liệu Object Oriented Programming With Cobol pptx
Ngày tải lên :
12/02/2014, 23:20
... acknowledged that the Software and the Documentation were developed at private expense, that no part is in the public domain, and that the Software and Documentation are Commercial Computer Software provided ... with the analysis of the problem and the design of a program or programs that solve the problem Object-oriented design involves identifying the objects that you want to work with and what they ... Parts and use the ISO 2002 OO COBOL syntax and terminology The chapters in Parts 4, and all relate to features and facilities of Micro Focus COBOL and use the Micro Focus OO COBOL syntax and terminology...
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Tài liệu BEGINNING OBJECT-ORIENTED PROGRAMMING WITH C# doc
Ngày tải lên :
15/02/2014, 07:20
... in the Source window by clicking the white sizing boxes that appear on the ends and corners of the label object You can increase the width of the label by clicking the middle sizing box on the ... change the font size of the label object, the height of the label is automatically adjusted for you Actually, I am not a big fan of automatic sizing of labels For that reason, I turn off the auto-sizing ... also exist for the Mac and Linux, and they appear to work well) with at least 4G of memory and 11G of disk space As mentioned, the version of Windows you use may affect which flavor of Visual Studio...
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Object Oriented Programming With Java pptx
Ngày tải lên :
05/03/2014, 13:20
... either the surname of the family or the number of the house To distinguish data in different areas of memory, we could give the data a name or use the numeric memory address of the first byte of ... and tips on teaching the material, together with all of the answers to the review questions, and many of the programming problems To utilize this guide, qualified instructors should contact their ... which is the root directory of the C drive The computer will search all the subdirectories of the root directory to find the subdirectory of the avi package If you use software that also requires...
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Beginning Object-Oriented Programming with VB 2005: From Novice to Professional pot
Ngày tải lên :
14/03/2014, 23:20
... from the logic of how the objects of the system work together to start the car You just initiate the sequence of events by executing the start method of the ignition object with the key You then ... an SRS The purpose of the SRS is to the following: • Define the functional requirements of the system • Identify the boundaries of the system • Identify the users of the system • Describe the interactions ... interview the business owners and the end users of the system The goals of these interviews are to clearly document the business processes involved and establish the system’s scope The outcome of this...
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Object oriented programming with C++ - Session 1 - Basic Object Oriented Concepts doc
Ngày tải lên :
16/03/2014, 01:20
... functions, which operate on the data elements s All the variables and the functions declared in a class, whether in the public or private section, are the members of the class s In a structure ... "erase" and "move" are examples of the methods that are part of the class s Object is a "black box" which receives and sends messages Object Oriented Method (Contd.) Sales What is the salary of Jack? ... Grouping of objects that have the same properties, common behaviour and common relationships s The term class is an abbreviation of “class of objects” • Example, A class of persons, class of animals,...
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Object oriented programming with C++ - Session 2 More on Classes potx
Ngày tải lên :
16/03/2014, 01:20
... initialisation of an object Has the same name as the class it belongs to Can declare and define constructors within the class, or declare them within the class and define them outside just as any other ... gives the address of the object, which was used to invoke the member function Whenever a member function is called, the compiler assigns the address of the object which invoked the function, to the ... Oriented Scope resolution operator (Contd.) The left-hand operator of :: must be the name of the class Only the scope operator identifies the function as a member of a particular class Is also used to...
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Object-Oriented Programming with PHP5 pptx
Ngày tải lên :
22/03/2014, 23:20
... structure, and can incorporate a lot of other objects in itself and either creates a tight coupling among them or a loose one And object can incorporate a lot of other object in itself and either creates ... in the preparation of this book to ensure the accuracy of the information presented However, the information contained in this book is sold without warranty, either express or implied Neither the ... Encapsulation: Encapsulation is the mechanism that binds together code and the data it manipulates, and keeps both safe from outside interference and misuse The wrapping up of data and methods into a single...
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