free barcode generator source code in c#.net FAIRY TALES in Font

Generator PDF-417 2d barcode in Font FAIRY TALES

CHAPTER 10 FAIRY TALES
PDF 417 Maker In None
Using Barcode drawer for Font Control to generate, create PDF-417 2d barcode image in Font applications.
www.OnBarcode.com
Drawing ANSI/AIM Code 39 In None
Using Barcode generator for Font Control to generate, create Code-39 image in Font applications.
www.OnBarcode.com
procedure tries to find a single LIKE match. If it does not find a single LIKE match, it may return a NO_DATA_FOUND or TOO_MANY_ROWS exception, which the presentation layer will need to handle. Both exceptions mean that the user has specified an invalid code value. Here s an example from code table package WORKER_TYPE_TS: PROCEDURE get_code_id_descr( aiov_code aon_worker_type_id aov_description aid_on v_code
QR Code 2d Barcode Generator In None
Using Barcode creator for Font Control to generate, create QR Code 2d barcode image in Font applications.
www.OnBarcode.com
Print Data Matrix In None
Using Barcode generation for Font Control to generate, create ECC200 image in Font applications.
www.OnBarcode.com
in out out out in
Make Barcode In None
Using Barcode printer for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
Making Barcode In None
Using Barcode maker for Font Control to generate, create Barcode image in Font applications.
www.OnBarcode.com
WORKER_TYPE_T.code%TYPE, WORKER_TYPE_T.worker_type_id%TYPE, WORKER_TYPE_T.description%TYPE, WORKER_TYPE_T.active_date%TYPE ) is WORKER_TYPE_T.code%TYPE;
Code 128A Maker In None
Using Barcode printer for Font Control to generate, create ANSI/AIM Code 128 image in Font applications.
www.OnBarcode.com
Generating 4-State Customer Barcode In None
Using Barcode printer for Font Control to generate, create USPS OneCode Solution Barcode image in Font applications.
www.OnBarcode.com
begin select worker_type_id, description into aon_worker_type_id, aov_description from WORKER_TYPE_T where code = aiov_code and aid_on between active_date and nvl(inactive_date, DATES.d_MAX); exception when NO_DATA_FOUND then select worker_type_id, code, description into aon_worker_type_id, v_code, aov_description from WORKER_TYPE_T where code like aiov_code||'%' and aid_on between active_date and nvl(inactive_date, DATES.d_MAX); aiov_code := v_code; end get_code_id_descr; Variable v_code is used in the second half of the method, during the LIKE match, to capture the full-length code value from the database and return it to the presentation layer. You can call this method from the WHEN-VALIDATE-ITEM event in Developer/2000 Forms, from the item_changed() event in PowerBuilder, from JavaScript (through a servlet ) in the onChange event of an Ajax-based web page, and so on. Now let s look at methods used with content tables.
PDF 417 Recognizer In VB.NET
Using Barcode recognizer for .NET Control to read, scan read, scan image in Visual Studio .NET applications.
www.OnBarcode.com
Make PDF-417 2d Barcode In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create PDF-417 2d barcode image in .NET framework applications.
www.OnBarcode.com
Content Table Methods
Make PDF417 In Java
Using Barcode maker for Java Control to generate, create PDF417 image in Java applications.
www.OnBarcode.com
EAN / UCC - 14 Maker In None
Using Barcode maker for Office Excel Control to generate, create EAN128 image in Office Excel applications.
www.OnBarcode.com
What s the difference between a code table and a content table In most cases, code tables have a very limited number of entries values agreed upon by the consensus of users or dictation of management. These agreed-upon values are used to categorize the input of content and
Drawing Code-128 In C#.NET
Using Barcode printer for .NET Control to generate, create ANSI/AIM Code 128 image in Visual Studio .NET applications.
www.OnBarcode.com
UPC - 13 Encoder In Objective-C
Using Barcode drawer for iPad Control to generate, create EAN / UCC - 13 image in iPad applications.
www.OnBarcode.com
CHAPTER 10 FAIRY TALES
Encoding QR Code JIS X 0510 In Java
Using Barcode creator for Java Control to generate, create Denso QR Bar Code image in Java applications.
www.OnBarcode.com
Barcode Printer In None
Using Barcode generation for Microsoft Excel Control to generate, create Barcode image in Excel applications.
www.OnBarcode.com
sometimes intersection entries. In contrast, content tables have an unlimited number of entries, where end users select or specify code values, enter numeric values, or enter textual values as part of doing business. In response to the unlimited number of entries possible in content tables, it s not uncommon to take the effort to code methods to eliminate the repeated coding of the SQL singleton SELECT, INSERT, and UPDATE statements with parametric method calls. Let s start out by looking at one such method.
Generate Linear Barcode In VS .NET
Using Barcode maker for ASP.NET Control to generate, create 1D image in ASP.NET applications.
www.OnBarcode.com
Linear Barcode Creator In Visual Basic .NET
Using Barcode generator for .NET framework Control to generate, create Linear Barcode image in .NET applications.
www.OnBarcode.com
get_row()
Printing GTIN - 13 In Visual Studio .NET
Using Barcode generation for .NET framework Control to generate, create GTIN - 13 image in VS .NET applications.
www.OnBarcode.com
QR Code 2d Barcode Creator In Visual C#.NET
Using Barcode drawer for .NET Control to generate, create QR-Code image in .NET applications.
www.OnBarcode.com
Method get_row() returns a PL/SQL record (a row) from a relational table or an instance of an object TYPE (a row) from an object table, based on the criteria specified in the record or object passed to the method. As the programmer, it s your responsibility to code the method to retrieve by the primary key and any other unique keys defined for the table in question. Then, to use this method, follow these steps: 1. Set column or attribute values in a corresponding PL/SQL record or object instance for only those columns or attributes that are used in a particular primary or unique key constraint. 2. Pass the PL/SQL record or object instance to the method. get_row() then returns a matching row from the database if a matching row exists; otherwise, it returns a NULL PL/SQL record or object instance. This method replaces a singleton SQL SELECT statement with a parametric method call based on a set of primary or unique key values. We never need to code that SQL statement ever again. Where s that unhappy SQL programmer now The following is an example of the get_row() method from content table package LOGICAL_ WORKPLACE_TS: FUNCTION get_row( air_logical_workplace return r_logical_workplace
LOGICAL_WORKPLACE_T%ROWTYPE) LOGICAL_WORKPLACE_T%ROWTYPE is LOGICAL_WORKPLACE_T%ROWTYPE;
begin if air_logical_workplace.logical_workplace_id is not NULL then --pl('retrieve the row by the primary key'); select * into r_logical_workplace from LOGICAL_WORKPLACE_T where logical_workplace_id = air_logical_workplace.logical_workplace_id; elsif air_logical_workplace.id_context is not NULL then --pl('retrieve the row by the id_context unique key'); select * into r_logical_workplace
CHAPTER 10 FAIRY TALES
from LOGICAL_WORKPLACE_T where id_context = air_logical_workplace.id_context; else --pl('retrieve the row by the code, name, and active_date'); select * into r_logical_workplace from LOGICAL_WORKPLACE_T where code = air_logical_workplace.code and name = air_logical_workplace.name and active_date = air_logical_workplace.active_date; end if; return r_logical_workplace; exception when NO_DATA_FOUND then raise; when OTHERS then raise_application_error(-20001, SQLERRM|| ' on select LOGICAL_WORKPLACE_T'|| ' in LOGICAL_WORKPLACE_TS.get_row()'); end get_row; As you will see shortly, get_row() is called by set_row() in order to determine whether to insert or update.
get_code_id_name(), get_code(), and get_name()
The methods get_code_id_name(), get_code(), and get_name() serve the same purpose as their counterparts in code table packages. See the section about get_code_id_descr() earlier in the chapter for an explanation.
is_duplicate()
In a database design where you use sequence-generated ID values for primary keys, every table will have a primary key that is an ID value, and at least one unique key that acts as a primary key made up of real-world values. Method is_duplicate() allows the presentation layer to verify that the values specified in fields on a screen are not going to create a row with duplicate values when an entry is saved to the database. Here s an example of FUNCTION is_duplicate(aiv_code, aiv_name, aid_active_date) from content table package LOGICAL_ WORKPLACE_TS: FUNCTION is_duplicate( aiv_code aiv_name aid_active_date return n_count
Copyright © OnBarcode.com . All rights reserved.