qr barcode generator vb.net SQL APIs in Software

Making QR Code 2d barcode in Software SQL APIs

SQL APIs
QR Code JIS X 0510 Scanner In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Painting QR Code 2d Barcode In None
Using Barcode printer for Software Control to generate, create QR Code image in Software applications.
For both interfaces, the program must allocate buffers to receive the query results and must bind individual columns to those buffer locations. With dynamic SQL, the program binds columns by placing the buffer addresses into the SQLVAR structures in the SQLDA. With SQL Server, the program uses the dbbind() function to bind the columns. For both interfaces, the query results are returned into the program s buffers, row by row. With dynamic SQL, the program retrieves a row of query results using a special version of the FETCH statement that specifies the SQLDA. With SQL Server, the program calls dbnextrow() to retrieve a row. Overall, the strategy used to handle dynamic queries is very similar for both interfaces. The dynamic SQL technique uses special statements and data structures that are unique to dynamic SQL; they are quite different from the techniques used for static SQL queries. In contrast, the dblib techniques for dynamic queries are basically the same as those used for all other queries. The only added features are the dblib functions that return information about the columns of query results. This tends to make the callable API approach easier to understand for the less-experienced SQL programmer.
Denso QR Bar Code Decoder In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
Quick Response Code Creation In C#
Using Barcode maker for .NET framework Control to generate, create Quick Response Code image in VS .NET applications.
ODBC and the SQL/CLI Standard
Make QR Code JIS X 0510 In .NET Framework
Using Barcode generator for ASP.NET Control to generate, create QR Code ISO/IEC18004 image in ASP.NET applications.
Making QR Code ISO/IEC18004 In VS .NET
Using Barcode generation for .NET Control to generate, create QR-Code image in .NET framework applications.
Open Database Connectivity (ODBC) is a database-independent callable API suite originally developed by Microsoft. Although Microsoft plays an important role as a database software vendor, its development of ODBC was motivated even more by its role as a major operating system developer. Microsoft wanted to make it easier for developers of Windows applications to incorporate database access. But the large differences between the various database systems and their APIs made this very difficult. If an application developer wanted a program to work with several different DBMS brands, it had to provide a separate, specially written database interface module (usually called a driver) for each one. Each application program that wanted to provide access to multiple databases had to provide a set of drivers. Microsoft s solution to this problem was to create ODBC as a uniform, standardized database access interface, and to incorporate it into the Windows operating system. For application developers, ODBC eliminated the need to write custom database drivers. For database vendors, ODBC provided a way to gain support from a broader range of application programs.
Encoding Quick Response Code In Visual Basic .NET
Using Barcode creator for .NET Control to generate, create Quick Response Code image in VS .NET applications.
Printing GS1 - 12 In None
Using Barcode maker for Software Control to generate, create UPC A image in Software applications.
PART V
EAN 13 Printer In None
Using Barcode generation for Software Control to generate, create EAN 13 image in Software applications.
Draw EAN / UCC - 13 In None
Using Barcode generation for Software Control to generate, create EAN / UCC - 13 image in Software applications.
The Call-Level Interface Standardization
ANSI/AIM Code 128 Generator In None
Using Barcode generator for Software Control to generate, create ANSI/AIM Code 128 image in Software applications.
DataMatrix Encoder In None
Using Barcode creation for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
ODBC would have been important even as a Microsoft-only standard. However, Microsoft worked to make it a vendor-independent standard as well. A database vendor association called the SQL Access Group was working on standardizing client/server protocols for remote database access at about the same time as Microsoft s original development of ODBC. Microsoft persuaded the SQL Access Group to expand their focus and adopt ODBC as their standard for vendor-independent database access. Management of the SQL Access Group standard was eventually turned over to the European X/OPEN consortium, another standards organization, as part of its overall standards for a Common Application Environment (CAE).
Creating ISSN In None
Using Barcode printer for Software Control to generate, create ISSN - 13 image in Software applications.
Generating EAN13 In .NET Framework
Using Barcode printer for Reporting Service Control to generate, create EAN13 image in Reporting Service applications.
Part V:
Encode Barcode In Objective-C
Using Barcode creation for iPhone Control to generate, create bar code image in iPhone applications.
Bar Code Creation In VS .NET
Using Barcode drawer for Reporting Service Control to generate, create bar code image in Reporting Service applications.
Programming with SQL
Bar Code Encoder In Visual C#.NET
Using Barcode creator for .NET framework Control to generate, create barcode image in .NET applications.
Making UCC - 12 In Visual Basic .NET
Using Barcode maker for Visual Studio .NET Control to generate, create GS1 128 image in .NET framework applications.
With the growing popularity of call-level APIs for database access, the official SQL standards groups eventually turned their attention to standardization of this aspect of SQL. The X/OPEN standard (based on Microsoft s earlier ODBC work) was taken as a starting point and slightly modified to create an official ANSI/ISO standard. The resulting SQL/CallLevel Interface (SQL/CLI) standard was published in 1995 as ANSI/ISO/IEC 9075-3-1995. With a few modifications, SQL/CLI became Part 3 of the SQL:1999 standard and has been carried forward with updates to all the subsequent versions of the ANSI/ISO standard. Microsoft has evolved ODBC to conform to the official SQL/CLI standard. The CLI standard roughly forms the core level of Microsoft s ODBC 3 revision. Other, higher-level capabilities of ODBC 3 go beyond the CLI specification to provide more API capability and to deal with the specific problems of managing ODBC as part of the Windows operating system. In practice, the core-level ODBC capabilities and the SQL/CLI specification form the effective callable API standard. Because of its substantial advantages for both application developers and database vendors, ODBC/CLI has become a very widely supported standard. Virtually all SQLbased database systems provide an ODBC/CLI interface as one of their supported interfaces. Some DBMS brands have even adopted ODBC/CLI as their standard database API. Thousands of application programs support ODBC/CLI, including all of the leading programming tools packages, query- and forms-processing tools and report writers, and popular productivity software such as spreadsheets and graphics programs. The SQL/CLI standard includes about 40 different API calls, summarized in Table 19-2. The calls provide a comprehensive facility for establishing connections to a database server, executing SQL statements, retrieving and processing query results, and handling errors in database processing. They provide all of the capabilities available through the standard s embedded SQL interface, including both static SQL and dynamic SQL capabilities. The simple CLI program in Figure 19-17 repeats the program in Figure 19-3 and 19-9, but it uses the CLI functions. It follows the sequence of steps used by most CLI-based applications: 1. The program connects to the CLI and allocates data structures for its use. 2. It connects to a specific database server. 3. The program builds SQL statements in its memory buffers. 4. It makes CLI calls to request statement execution and check status. 5. Upon successful completion, it makes a CLI call to commit the database transaction. 6. It disconnects from the database and releases its data structures. All of the CLI routines return a status code indicating either successful completion of the routine or some type of error or warning about its execution. The values for the CLI return status codes are summarized in Table 19-3. Some of the program examples in this book omit the checking of return status codes to shorten the example and focus on the specific features being illustrated. However, production programs that call CLI functions should always check the return value to ensure that the function was completed successfully. Symbolic constant names for the return status codes as well as many other values, such as data type codes and statement-id codes, are typically defined in a header file that is included at the beginning of a program that uses the CLI.
Scanning Code39 In C#
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in Visual Studio .NET applications.
Create ANSI/AIM Code 128 In None
Using Barcode generation for Online Control to generate, create Code 128A image in Online applications.
19:
Copyright © OnBarcode.com . All rights reserved.