What is a class 1 database?

what is a class 1 database?. Can anyone explain in detail about what classifies a database as class 1?.
Searched on google, but couldn't get a single link explaining what this term means..

user1980 wrote:
what is a class 1 database?. A class higher than a class 2 database?
Can anyone explain in detail about what classifies a database as class 1?.
Searched on google, but couldn't get a single link explaining what this term means..Well, have not heard of this term myself in all the years I've worked with database. And so it seems Google too... Where do you hear the term? In what context was it used?
If one talks about class 1 and class 2 and so on in information technology, I immediately think IP address classes... But then I have a wee bit of networking background that explains that. ;-)

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Hi.
I need to know what is "data class". I am aplying a hot package in SAP, and it generated a error because el data class USR34 not exists associated with cdhdr table. The note says that I must create it, but I don´t know how I must to do it.
And I don't know if I can associate other data class that exists as USR33.
Thanks for your help.
Maria C.

Hello Maria,
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Hi Girish,
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data : l_seatsfree type i.
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*ENDTRY.
*TRY.
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EXPORTING
 I_CARRID = 'LH'
 I_CONNID = '0400'
 I_FLDATE = '20060701'
RECEIVING
 RESULT = l_flight
* CATCH CX_OS_OBJECT_NOT_FOUND .
*ENDTRY.
l_seatsfree = L_FLIGHT->GET_SEATSMAX( ) - L_FLIGHT->GET_SEATSOCC( ).
if l_seatsfree > 0.
l_seatsfree = L_FLIGHT->GET_SEATSOCC( ) + 1.
l_flight->set_seatsocc( l_seatsfree ).
endif.
There are lots of other methods and techniques that you can use in persistent classes.
A demonstration of this can be found in program DEMO_CREATE_PERSISTENT.
DEMO_QUERY_PERSISTENT
kindly look into below link for screen shot to create persistence class
http://erpgenie.com/abaptips/content/view/417/38/
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Could anyone tell me what is a class

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Classes describe objects. From a technical point of view, objects are runtime instances of a class. In theory, you can create any number of objects based on a single class. Each instance (object) of a class has a unique identity and its own set of values for its attributes.
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CLASS <class> DEFINITION.
ENDCLASS.
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If you declare methods in the declaration part of a class, you must also write an implementation part for it. This consists of a further statement block:
CLASS <class> IMPLEMENTATION.
ENDCLASS.
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Structure of a Class
The following statements define the structure of a class:
A class contains components
Each component is assigned to a visibility section
Classes implement methods
The following sections describe the structure of classes in more detail.
Class Components
The components of a class make up its contents. All components are declared in the declaration part of the class. The components define the attributes of the objects in a class. When you define the class, each component is assigned to one of the three visibility sections, which define the external interface of the class. All of the components of a class are visible within the class. All components are in the same namespace. This means that all components of the class must have names that are unique within the class.
There are two kinds of components in a class - those that exist separately for each object in the class, and those that exist only once for the whole class, regardless of the number of instances. Instance-specific components are known as instance components. Components that are not instance-specific are called static components.
In ABAP Objects, classes can define the following components. Since all components that you can declare in classes can also be declared in interfaces, the following descriptions apply equally to interfaces.
Attributes
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Instance Attributes
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Static Attributes
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All of the objects in a class can access its static attributes. If you change a static attribute in an object, the change is visible in all other objects in the class.
Methods
Methods are internal procedures in a class that define the behavior of an object. They can access all of the attributes of a class. This allows them to change the data content of an object. They also have a parameter interface, with which users can supply them with values when calling them, and receive values back from them The private attributes of a class can only be changed by methods in the same class.
The definition and parameter interface of a method is similar to that of function modules. You define a method <met> in the definition part of a class and implement it in the implementation part using the following processing block:
METHOD <meth>.
ENDMETHOD.
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Instance Methods
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Static Methods
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Special Methods
As well as normal methods, which you call using CALL METHOD, there are two special methods called CONSTRUCTOR and CLASS_CONSTRUCTOR, which are automatically called when you create an object (CONSTRUCTOR) or when you first access the components of a class (CLASS_CONSTRUCTOR).
Events
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Events have a similar parameter interface to methods, but only have output parameters. These parameters are passed by the trigger (RAISE EVENT statement) to the event handler method, which receives them as input parameters.
The link between trigger and handler is established dynamically in a program using the SET HANDLER statement. The trigger and handlers can be objects or classes, depending on whether you have instance or static events and event handler methods. When an event is triggered, the corresponding event handler methods are executed in all registered handling classes.
Instance Events
You declare instance events using the EVENTS statement. An instance event can only be triggered in an instance method.
Static Events
You declare static events using the CLASS-EVENTS statement. All methods (instance and static methods) can trigger static events. Static events are the only type of event that can be triggered in a static method.
See also Triggering and Handling Events.
Types
You can define your own ABAP data types within a class using the TYPES statement. Types are not instance-specific, and exist once only for all of the objects in a class.
Constants
Constants are special static attributes. You set their values when you declare them, and they can then no longer be changed. You declare them using the CONSTANTS statement. Constants are not instance-specific, and exist once only for all of the objects in a class.
Visibility Sections
You can divide the declaration part of a class into up to three visibility areas:
CLASS <class> DEFINITION.
PUBLIC SECTION.
PROTECTED SECTION.
PRIVATE SECTION.
ENDCLASS.
These areas define the external visibility of the class components, that is, the interface between the class and its users. Each component of a class must be assigned to one of the visibility sections.
Public Section
All of the components declared in the public section are accessible to all users of the class, and to the methods of the class and any classes that inherit from it. The public components of the class form the interface between the class and its users.
Protected Section
All of the components declared in the protected section are accessible to all methods of the class and of classes that inherit from it. Protected components form a special interface between a class and its subclasses. Since inheritance is not active in Release 4.5B, the protected section currently has the same effect as the private section.
Private Section
Components that you declare in the private section are only visible in the methods of the same class. The private components are not part of the external interface of the class.

What is a logical database

Hi All,
what is a logical database? what is the use of it.

Hi again,
1. To get a taste of it.
2. create a new z program.
3. while creating type PNP
in logical database field.
4. paste this code and execute.
REPORT ABC.
infotypes : 0001.
TABLES : PERNR.
GET PERNR.
WRITE :/ PERNR-PERNR.
5. The selection screen which u see
is coming from logical database PNP program.
6. Execute
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SAPDBPNP
this is the main program of LDB PNP
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SAPDB + ldb name.
regards,
amit m.
Message was edited by: Amit Mittal

What file format Oracle Database 11g can spool data w chinese characters?

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LC_ADDRESS="fr_FR.UTF-8"
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LC_IDENTIFICATION="fr_FR.UTF-8"
LC_ALL=
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cat tchinese.sql
set echo on
spool tchinese.log
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select unistr('\8349') from dual;
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BANNER
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Prod
PL/SQL Release 10.2.0.1.0 - Production
CORE     10.2.0.1.0     Production
TNS for Linux: Version 10.2.0.1.0 - Production
NLSRTL Version 10.2.0.1.0 - Production
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UNIS
草                                                                              Edited by: P. Forstmann on May 27, 2009 10:30 AM
Edited by: P. Forstmann on May 27, 2009 10:33 AM

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and
What are the Interfaces in JDBC?
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regards
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thank you.
regards
pooja

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