barcode generator in vb.net codeproject standard in Software

Creator Code 3/9 in Software standard

standard
USS Code 39 Scanner In None
Using Barcode Control SDK for Software Control to generate, create, read, scan barcode image in Software applications.
Creating Code 3/9 In None
Using Barcode generator for Software Control to generate, create Code 3 of 9 image in Software applications.
15. Which clause in an INSERT statement can contain a subquery 16. How many values can a subquery return if it is used in an INSERT statement 17. Which clauses in an UPDATE statement can contain a subquery
USS Code 39 Recognizer In None
Using Barcode recognizer for Software Control to read, scan read, scan image in Software applications.
Code 39 Full ASCII Encoder In Visual C#.NET
Using Barcode generation for VS .NET Control to generate, create USS Code 39 image in .NET applications.
Part
ANSI/AIM Code 39 Drawer In .NET Framework
Using Barcode generation for ASP.NET Control to generate, create Code 39 Full ASCII image in ASP.NET applications.
Draw Code-39 In VS .NET
Using Barcode generator for Visual Studio .NET Control to generate, create Code 39 image in .NET framework applications.
Advanced Data Access
USS Code 39 Maker In Visual Basic .NET
Using Barcode maker for Visual Studio .NET Control to generate, create Code 39 Extended image in .NET applications.
Bar Code Encoder In None
Using Barcode encoder for Software Control to generate, create bar code image in Software applications.
Copyright 2009 by The McGraw-Hill Companies. Click here for terms of use.
Make GS1 - 13 In None
Using Barcode generation for Software Control to generate, create European Article Number 13 image in Software applications.
Paint ANSI/AIM Code 39 In None
Using Barcode generation for Software Control to generate, create Code 3 of 9 image in Software applications.
This page intentionally left blank
Painting Bar Code In None
Using Barcode printer for Software Control to generate, create bar code image in Software applications.
Printing Code 128 In None
Using Barcode creator for Software Control to generate, create Code 128B image in Software applications.
Creating SQL-Invoked Routines
ITF-14 Creator In None
Using Barcode creation for Software Control to generate, create EAN - 14 image in Software applications.
Drawing Bar Code In None
Using Barcode printer for Word Control to generate, create barcode image in Microsoft Word applications.
Copyright 2009 by The McGraw-Hill Companies. Click here for terms of use.
Decoding DataMatrix In VB.NET
Using Barcode decoder for Visual Studio .NET Control to read, scan read, scan image in VS .NET applications.
Making Code 3/9 In Java
Using Barcode generator for Java Control to generate, create Code39 image in Java applications.
SQL: A Beginner s Guide
Make Data Matrix ECC200 In None
Using Barcode drawer for Office Excel Control to generate, create Data Matrix ECC200 image in Excel applications.
GS1 - 12 Maker In None
Using Barcode creation for Word Control to generate, create UPCA image in Microsoft Word applications.
Key Skills & Concepts
Data Matrix 2d Barcode Creator In None
Using Barcode creator for Font Control to generate, create DataMatrix image in Font applications.
UPC Code Drawer In None
Using Barcode creation for Font Control to generate, create GTIN - 12 image in Font applications.
Understand SQL-Invoked Routines Create SQL-Invoked Procedures Add Input Parameters to Your Procedures Add Local Variables to Your Procedures Work with Control Statements Add Output Parameters to Your Procedures Create SQL-Invoked Functions
rior to the release of SQL:1999, the American National Standards Institute (ANSI) and the International Organization for Standardization (ISO) published an interim standard in 1996 that added procedures and functions, along with related language, to the existing SQL standard as Part 4. This new publication, also referred to as SQL/PSM, or PSM-96 (PSM standing for persistent stored module), represented the first step toward including procedural capabilities within SQL itself. Part 4 (SQL/PSM) was revised and incorporated into the SQL:1999 standard, and revised again for the SQL:2003 standard. These procedural capabilities define, among other components, the creation of SQL-invoked routines specifically, SQL-invoked procedures and SQL-invoked functions. In this chapter, we ll take a close look at both procedures and functions, including how to create them and how to invoke them once they re created. We ll also take a look at a number of examples that demonstrate the various types of procedures and functions and the components that make up each.
Understand SQL-Invoked Routines
I first introduced you to the concept of SQL-invoked routines in 2, where I describe the schema objects that can exist within an SQL environment. As you might recall, an SQLinvoked routine is a function or procedure that can be invoked from SQL. Both functions and procedures are stored sets of predefined SQL statements that perform some sort of action on the data in your database. For example, you can define a SELECT statement and store it as an SQL-invoked procedure. Once you have created that procedure, you can invoke it simply by calling its name and, if appropriate, supplying the necessary parameters. Unlike views, all SQL-invoked routines support the use of parameters, which are values passed to and from a routine when you invoke that routine. A function can receive input parameters and return a value based on the expression included in the function definition. A procedure can pass input and output parameters. Regardless of whether it s a procedure or function,
13:
Creating SQL-Invoked Routines
an SQL-invoked routine can be a schema object or can be embedded in an SQL server module, which is also a schema object. (A module is an object that contains SQL statements or routines.)
NOTE
SQL:2006 also supports a third type of SQL-invoked routine the SQL-invoked method. A method, which is used in user-defined types, is a type of function that performs predefined tasks. SQL supports two types of user-defined types: structured types and distinct types. Methods are used in structured types. The subject of structured user-defined types is beyond the scope of the book, so I won t be covering methods in this chapter.
Most SQL implementations support some form of the SQL-invoked routine in their products. Within various SQL implementations, SQL-invoked procedures are often referred to as stored procedures, and SQL-invoked functions are often referred to as user-defined functions. Regardless of the names used, the fundamental concepts are the same, and the basic functionality supported is similar from product to product. However, while concepts and functionality are similar, the implementation of SQL-invoked routines can vary widely, and the specifics of how SQL-invoked routines are created and called, differ not only between the SQL standard and the individual product, but also between the products themselves. The main reason for this is that many products had already implemented PSM technology prior to the initial publication of the SQL/PSM standard in 1996. As a result, proprietary functionality has persisted among the different implementations, with few SQL products conforming to the actual SQL/PSM standard, or, consequently, the PSM-related portion of the SQL:2006 standard. Despite the product differences, it is still worthwhile to have a look at the basic concepts behind SQL-invoked routines, as they are defined in the SQL standard. The standard provides insight into the underlying structure used by the various SQL implementations and can give you a cohesive overview of the basic concepts shared by all products that implement SQL-invoked procedures and functions. However, as with other SQL-related technology, you should refer to the product documentation for your specific SQL implementation. In few cases will you be able to use pure (standard) SQL to create an implementation-specific SQL-invoked routine.
Copyright © OnBarcode.com . All rights reserved.