qr barcode generator vb.net Query-Processing Efficiency in Software

Painting Denso QR Bar Code in Software Query-Processing Efficiency

Query-Processing Efficiency
Decode Quick Response Code In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
QR Code Printer In None
Using Barcode generation for Software Control to generate, create QR Code ISO/IEC18004 image in Software applications.
PART V
Recognize QR In None
Using Barcode decoder for Software Control to read, scan read, scan image in Software applications.
Denso QR Bar Code Printer In C#.NET
Using Barcode maker for VS .NET Control to generate, create QR image in Visual Studio .NET applications.
Part V:
Draw Quick Response Code In .NET
Using Barcode creator for ASP.NET Control to generate, create QR Code image in ASP.NET applications.
Creating QR Code In Visual Studio .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create QR image in Visual Studio .NET applications.
Programming with SQL
Printing QR Code JIS X 0510 In Visual Basic .NET
Using Barcode encoder for Visual Studio .NET Control to generate, create QR Code image in Visual Studio .NET applications.
Print DataMatrix In None
Using Barcode generation for Software Control to generate, create Data Matrix 2d barcode image in Software applications.
The Oracle Call Interface (OCI)
Bar Code Creator In None
Using Barcode printer for Software Control to generate, create barcode image in Software applications.
Draw EAN 13 In None
Using Barcode encoder for Software Control to generate, create EAN13 image in Software applications.
The most popular programmatic interface to Oracle is embedded SQL. However, Oracle also provides an alternative callable API, known as the Oracle Call Interface, or OCI. OCI has been available for many years and remained fairly stable through a number of major Oracle upgrade cycles, including all of the Oracle 7 versions. With the introduction of Oracle8, OCI underwent a major revision, and many of the original OCI calls were replaced by new, improved versions. Moving forward through Oracle 9i, 10g, 11g, and beyond, this new OCI (the Oracle 8 version) is effectively the Oracle Call Interface for new programs. The old OCI (from Oracle 7 and before) is relevant only for legacy programs that were originally developed using it. For reference, selected old OCI routines are summarized in Table 19-6, so that you can recognize a program that may be using this old version. Conceptually, the routines closely parallel the embedded dynamic SQL interface, described in 18. The new OCI uses many of the same concepts as the SQL/CLI standard and ODBC, including the use of handles to identify interface objects. Several hundred routines are defined in the API, and a complete description of them is beyond the scope of this book. The following sections identify the major routines that will be used by most application programs and their functions.
Barcode Creation In None
Using Barcode drawer for Software Control to generate, create barcode image in Software applications.
Creating USS Code 39 In None
Using Barcode encoder for Software Control to generate, create Code 39 Extended image in Software applications.
OCI Handles
Create British Royal Mail 4-State Customer Barcode In None
Using Barcode printer for Software Control to generate, create Royal Mail Barcode image in Software applications.
Paint GS1 - 13 In Objective-C
Using Barcode encoder for iPad Control to generate, create EAN 13 image in iPad applications.
The new OCI uses a hierarchy of handles to manage interaction with an Oracle database, like the handle hierarchy of the SQL/CLI described earlier in the section CLI Structures. The handles are Environment handle Service context handle processing Server handle Session handle Bind handle Define handle The top-level handle associated with an OCI interaction Identifies an Oracle server connection for statement
Print UPC-A Supplement 5 In Visual Basic .NET
Using Barcode drawer for .NET Control to generate, create UPC Code image in .NET framework applications.
Code 3/9 Drawer In None
Using Barcode maker for Online Control to generate, create Code 39 image in Online applications.
Identifies an Oracle database server (for multisession applications) Identifies an active user session (for multisession applications) Identifies an Oracle-SQL statement being processed
1D Generation In .NET
Using Barcode encoder for ASP.NET Control to generate, create Linear Barcode image in ASP.NET applications.
Universal Product Code Version A Generation In Java
Using Barcode printer for Java Control to generate, create UPC-A Supplement 2 image in Java applications.
Statement handle
Encode GTIN - 12 In C#
Using Barcode creator for .NET Control to generate, create UCC - 12 image in Visual Studio .NET applications.
GS1 - 12 Recognizer In Java
Using Barcode decoder for Java Control to read, scan read, scan image in Java applications.
Identifies an Oracle statement input parameter Identifies an Oracle query results column Identifies a SQL transaction in progress Retrieves data from an Oracle object
Transaction handle Error handle
Complex object handle
Reports and processes OCI errors
An application program manages OCI handles using the routines shown in Table 19-7. The allocate (Alloc) and Free routines function like their SQL/CLI counterparts. The Get attribute and Set attribute functions operate like the similarly named SQL/CLI routines that get and set environment, connection, and statement attributes. An error handle is used to pass information back from OCI to the application. The error handle to be used for error reporting is typically passed as a parameter to OCI calls. If the return status indicates an error, information about the error can be retrieved from the error handle using OCIErrorGet().
19:
SQL APIs
Function Database connection/disconnection olon() oopen() oclose() ologof() Basic statement processing osql3() oexec() oexn() obreak() oermsg() Statement parameters obndrv() obndrn() Transaction processing ocom() orol() ocon() ocof() Query results processing odsc() oname() odefin() ofetch() ofen() ocan()
TABLE 19-6
Description Logs onto an Oracle database Opens a cursor (connection) for SQL statement processing Closes an open cursor (connection) Logs off from an Oracle database Prepares (compiles) a SQL statement string Executes a previously compiled statement Executes with an array of bind variables Aborts the current Oracle call interface function Obtains error message text Binds a parameter to a program variable (by name) Binds a parameter to a program variable (by number) Commits the current transaction Rolls back the current transaction Turns on autocommit mode Turns off autocommit mode Obtains a description of a query results column Obtains the name of a query results column Binds a query results column to a program variable Fetches the next row of query results Fetches multiple rows of query results into an array
Copyright © OnBarcode.com . All rights reserved.