Why We Use Databases?

Please give me some detail. or some link, on this question.

Hi S R,
Livecache is a special type of memory cache specially designed for SCM-APO system. Using this, simultaneous transitions can be carried out with many users at the same time which results in speedy response in retrieving of data.
In APO, the time series, order series are stored in this livecache and hence quick results can be obtained. This is especially used in Optimiser where in linear algorithm calculations are made in faster seconds.
Hope this will answers your query,
Please confirm
Regards
R. Senthil Mareeswaran.

Similar Messages

Why sql sever database design is used for essbas?

Hi
I am new to the Hyperion technology . i would like to know why do we use any RDBM like sql sever database design for essbase which is itself is the database.What is the main difference between these two databases?
My understanding is that Essbase act as same as SSAS for cube and dimension building.And they use database design for storing the tables and other information.
Thanks

A relational database can be used for a number of reasons with Essbase (and is required in some instances). These include
1. a repository for system tables for Shared services, EAS, Studio,EPMA, Workspace, Financial Management etc
2. A data source for loading Essbase
3. A work area for transformations

Why IPC uses CRM as database and not R/3 ?

Hi ,
can any one help me with an answer for the following question :
<b>Why IPC uses CRM as database and not R/3 ?</b>
Points will be rewarded for helpful answer
thanks
ritu

Hi
IPC have Sales Pricing Engine, Pricing Configuration engine and TTE which helps to maintain the similar R3 pricing settings. As you are aware pricing in R3 is determined by Sales area, Cupp, DPP, so IPC is capable of determining the Pricing using same R3 standard procedure. T
This is not available in CRM, so CRM needs IPC to undertake the determine pricing/ calculate the pricing of the products.
Regards
Nagarj

TNS-12666 error occures when using database link

When I am trying to use database link
defined in my database the following error occures:
TNS-12666 Dedicated server: outbound transport protocol different from inbound.
In documentation is stated to resolve such an error to
specify the same protocol in the SQL*Net connect string or alias for the outbound connection as that used for the inbound connection.
I have in tnsnames.ora defined network service name
by which I can connect to such a database by SQL*Plus
without any problems, why can I not do such a thing
via database link?
Thanks a lot for advise, ...

Could you change the following entry in your 'sqlnet.ora' file and try?
SQLNET.AUTHENTICATION_SERVICES = (NONE)

Using database views in ADF mobile client application

Hi,
I am using Jdeveloper 11.1.1.4 and WLS 10.3.4.
I have developed a POC in ADF mobile client application both with and without synchronization. However, both work with entity objects based on tables.
I need to use database views instead of tables. When I try to include entity object (based on views) in the view object, it shows an error saying "Only the entity objects based on tables can be selected"
Please guide me if there is a work around for this.
Also, please let me know if there is way to develop an ADF mobile client application skipping the use of entity objects at all and using view objects directly to specify the database query and fetch data from the database.
Thanks in advance.
Ansh
Edited by: ansh on Mar 28, 2011 5:40 AM

Hi, Ansh:
Currently, out of box, ADF Mobile Client does not support synchronization against Database Views. This is because Mobile Server imposes some schema restrictions to ensure synchronization with multi-table views would work correctly. This schema restriction requires, for example, the view must have a primary parent table with key defined, and also all base table must be included in the data publication. These dependencies requires manual resolution and advanced planning, and is managed outside of the ADF Mobile Client/JDeveloper project.
To continue development, you would need to create server Entity Objects directly against the base tables. You can then create the mobile ADF Business Component (EOs, VOs, etc). You can then create View Objects in your ADF Mobile Client application based on the database views, in order to retrieve the data you need exactly. In other words, instead of basing EO on the database view, create View Objects in the mobile applicaiton to mimic what you had in the View Object.
Is there any other reason why you would need to access data via database views, instead of directly against base tables?
Thanks,
Joe Huang

Error while invoking custom API using Database Adapter

Hi,
I've a requirement where in I need to fetch the data returned by a recordtype of a custom API. I've implemented this by invoking the custom API using Database Adapter. I'm facing a problem while performing this.
The custom API holds the signature as:
PROCEDURE EMP_DET
Argument Name Type      In/Out Default?
P_DEPTNO NUMBER IN
L_LINE_TBL TABLE OF RECORD OUT
I've a schema with which it needs to be validated. It looks like:
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<schema xmlns="http://www.w3.org/2001/XMLSchema" xmlns:po="http://www.mycompany.com/ns/sales" targetNamespace="http://www.mycompany.com/ns/sales" elementFormDefault="qualified">
<element name="EmployeeDetails">
<complexType>
<sequence>
<element name="EmpNo" type="integer"/>                    <element name="EName" type="string"/>                    <element name="Job" type="string"/>                    <element name="Mgr" type="integer"/>                    <element name="HireDate" type="date"/>                    <element name="Sal" type="decimal"/>                    <element name="Comm" type="decimal"/>               </sequence>
</complexType>
</element>
</schema>
I did a transformation to the above stated Emp.xsd with the xsd created for my custom API by the BPEL process. I could create the process and deploy successfully, but while invoking I get the following error. (I'm using BPM 10.1.3.1 with JDev 10.1.3.1)
<remoteFault xmlns="http://schemas.oracle.com/bpel/extension"><part name="code"><code>6502</code>
</part><part name="summary"><summary>file:/D:/OraBPEL/bpel/domains/default/tmp/.bpel_my_poc_1.0_16c5d0f7b937c780d27d8975726a15cb.tmp/emp_details.wsdl [ emp_details_ptt::emp_details(InputParameters,OutputParameters) ] - WSIF JCA Execute of operation 'emp_details' failed due to: Error while trying to prepare and execute an API.
An error occurred while preparing and executing the SCOTT.BPEL_EMP_DETAILS.EMP_PKG$EMP_DET API. Cause: java.sql.SQLException: ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at line 1
[Caused by: ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at line 1
; nested exception is:
     ORABPEL-11811
Error while trying to prepare and execute an API.
An error occurred while preparing and executing the SCOTT.BPEL_EMP_DETAILS.EMP_PKG$EMP_DET API. Cause: java.sql.SQLException: ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at line 1
[Caused by: ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at line 1
Check to ensure that the API is defined in the database and that the parameters match the signature of the API. Contact oracle support if error is not fixable.
</summary>
</part><part name="detail"><detail>
Internal Exception: java.sql.SQLException: ORA-06502: PL/SQL: numeric or value error
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at "SCOTT.BPEL_EMP_DETAILS", line 1
ORA-06512: at line 1
Error Code: 6502</detail>
</part></remoteFault>
Can someone let me know as to why I'm getting this error? Also lemme know if such an approach is valid to do, if not please suggest me alternate methods to do this.
Thanks in advance,
Gayathri

The 'numeric or value error' is one we have seen many times. The problem has been identified and fixed. Refer to this thread for more information.
Issue with DB Adapter - ORABPEL-11811

What is the intelligent calc? Why we use that?

If u loads data to parent level where data will be stored?
What r the unary operators?
How do u decide dense & Sparse?
What is the header? Why we use header in the rule file?
Please give me reply dont say read dabg
Thank u.......

OK,
You have a database/application.
1. You might have had run the calculation( ie calc script).
2. after that , you might have loaded the data ,i.e you have infused new data and new data blocks.
3. For these new data blocks ,you have not run the calculation so far
4. so, now the intelligent calculation come into picture, with the help of the intelligent calculation concept, we can run the calculation on only the new data loaded or on only new data blocks,which you loaded
Hope this helps you in understanding the intellligence calculation in short.
One can enable and disable at his comfort ,and for that please refer to the following commands
SET UPDATECALC
SET CLEARUPDATESTATUS
this is to answer you intelligent calc.
1. when you load data into the parent level , it ll be stored at the parent level only.
2. when you go to "Dimension"' tab of the database properties, you can get which one is dense or sparse
3. in general ,you have a datafile ,and the upper most line is the one ,which has headers,so manipulate the same ,you use headers in the rule file.
I have not told you to refer DBAG , :)
But, you got to read DBAG or pick a bootcamp for you to understand further .
Sandeep Reddy Enti
HCC

Why we use Cluster Tables in SAP Hr

hai friends, i am new to ABAP-HR and SAP HR, Actually i am core abaper ( working on SD, MM and Fi Modules ) , can any one explain me why and what is the use of Cluster tables in SAP HR, why we use in SAP HR function Module ?
Thnx in advance
Vijaya

Hi Vijaya,
This may help for ur question..
Why cluster table:
Cluster tables combine the data from several tables with identical (or almost identical) keys into one physical record on the database.
Data is written to a database in compressed form.
Retrieval of data is very fast if the primary key is known.
Cluster tables are defined in the data dictionary as transparent tables.
External programs can NOT interpret the data in a cluster table.
Special language elements EXPORT TO DATABASE, IMPORT TO DATABASE and DELETE FROM DATABASE are used to process data in the cluster tables.
PCL1 - Database for HR work area; (long text, etc)
PCL2 - Accounting Results (time, travel expense and payroll); (payroll results)
PCL3 - Applicant tracking data;
PCL4 - Documents, Payroll year-end Tax data (change logs, etc)

Why we use Tables statement in case of using SELECT-OPTIONS:

hi all,
Why we use Tables statement in case of using the following coding in an ABAP program ...
tables: vbak.
SELECT-OPTIONS: s1 for vbak-vbeln.
here if we dont provide the tables statement why it does not work ????
pls answwer ....???

Hi
This statement is not allowed in classes and declares a data object table_wa as a table work area whose data type is adopted from the identically named structured data type table_wa from the ABAP Dictionary. table_wa must be defined as a flat structure in the ABAP Dictionary. You can specify database tables or Views for table_wa.
Work table areas declared with TABLES are interface work areas and should only be declared in the global declaration section of a program for the following purpose:
reward if usefull
The statement TABLES is required for exchanging data between screen fields that were defined in a program screen when transferring from the ABAP Dictionary and the ABAP program. For the screen event PBO, the content of the table work area is transferred to identically named screen fields; for PAI, the system adopts the data from identically named screen fields.
In executable programs, flat table work areas can be used for adopting data that were provided for the event GET table_wa from a linked logical database. TABLES is synonymous with the statement NODES for this purpose.
Work table areas declared with TABLES behave like the data declared with the addition COMMON PART, meaning the data are used by the programs of a program group.
Table work areas declared with TABLES can be declared in subroutines and
function modules. However, this is not recommended. A table work area declared in a procedure is not local but belongs to the context of a framework program. The table work area can be viewed starting from the declaration in the framework program and lives as long as the framework program. In contrast to normal program-global data, the content of the table work areas declared in subroutines and function modules is stored temporarily when these subroutines and function modules are called. Value assignments that were made during runtime of the procedure are preserved until the procedure is completed. When exiting the procedure, the table work areas are filled with the contents that they contained when the procedure was called. Table work areas declared in procedures behave like global data to which the statement LOCAL is applied in the procedure.
The form TABLES * is obsolete.

How can I use database constraints in entity attribute validation rules

I am interested in using database constraints to validate attributes in entity objects.
I would like to implement a JboValidatorInterface in a way that I can use an operator like "GreaterOrEqualTo" to compare with values retrieved from the database for a column associated with an entity object attribute.
I have used this pattern with success in other environments, where the user community decides the minimum value for a thing should change from x to y, and simply changing a database object also changes the validation methods of all applications which access it.
I am not certain that column constraints are the appropriate vehicle, but so far that seems to be the case.
I see that you can create a validation rule which makes comparisons against a view object attribute. I am wondering if there is a generic way to use standardized names for column constraints along with ADF hooks into properties of database columns, to avoid writing individual queries for each attribute.
Thanks in advance!!!

Jeffrey,
If you already have constraints on the underlying tables, why do you need to validate them in ADF BC? You can certainly use some framework extension classes to give the user nicely formatted error messages - see ER: ADF BC - allow custom error msgs for common exceptions (e.g. DML) for more details.
I am using this method so that anything that is enforced in the database (check constraints, foreign keys, unique constraints, etc) are not enforced in the ADF BC layer as well - after all, there's more than one way to get data into a table, and DB constraints ensure that even if data gets in through another mechanism (apart from the ADF application), it is valid. My 2 cents, of course.
Hope this helps,
John

Using Database Configuration Assistant

hi
i m using Database Configuration Assistant in Windows2000....when i try to create a new template using the structure of a current running database(ORCL)...i m having a problem....it asks for a DBA usernam,e and password and Service name to connect to the database which structure is to be used for creating a database template ....i have service name ORCL....and it is working whn i try to conect using SQLPLUS...but when i use this service ORCL to connect here i receive error
VBD-2000 SERVICE ALIAS COULD NOT BE RESOLVED
why i m receiving this error???
Regards

Ensure that service is registered in the listener.ora file, reload the listener and ensure that service is an entry of the tnsnames.ora file.
Joel Pérez
http://otn.oracle.com/experts

Why even use iphoto?

My first experience with iphoto, it corrupted all of my picture files. Luckily I had them all saved on an external harddrive, so I didn't lose them. But many people don't do that and the risk of them losing all of their picture files using iphoto is high. And yes, I tried all of the things listed to rebuild the file and none of them worked. I spoke with tech support and they confirmed that all of my files were corrupted and useless.
So with the fact that the program is unstable and that it uses a system of "Aliases" that makes it impossible to locate your files outside of iphoto, or make any changes to them outside of iphoto... why even use it? It seems to me like it's set up solely to force the user into using only mac products.
Since it destroyed all of my files, I just keep my photos in folders that I created that make sense to ME and I use the program that came with my digital camera to edit them. If I need to look at them, I can see them in the Preview application.
Is there some other reason I should be using iphoto?

I posted because I have a question: why use iphoto? I want to hear someone tell me exactly why they use it and what they love about the program so I can figure out how I can use it to its fullest potential. Please, someone help me understand.
I'll tell you my story, in case it helps answer this question. Keep in mind that iPhoto has many capabilities, and each person can use it in a different way. Here I describe how I use it, past and present.
Pre iPhoto: After my first child was born I got a digital camera and a hand-me-down Mac. I uploaded photos to the hard drive and moved them around in the Finder. I renamed my files to try to help me remember the subject of the photos, tried to organize folders. I got Photoshop Elements and began editing. Then I had to keep edited photos separate from the unedited photos, to somehow know which was which. Some I downsized and uploaded to a sharing website. I needed to know which photos had been shared, so I kept them in another set of folders. If I printed or used photos in a project, I needed them in folders.
This led to rather a mess of folders, all using space in my hard drive. Say I had a photo, knew it was edited, wanted the original... could I find it? I tried managing the photos by date, but ended up with the same photos in different locations. It was very difficult for me to search the different file structures (all set up by me) and find the best version of a particular photo - I organized and reorganized many times, fighting an uphill battle.
Skip ahead to my next hand-me-down Mac, which had iPhoto. I imported my folders of photos. Now I could see them quickly without opening in Preview. It was easy to determine which were duplicates and keep the best one. I got all my images in one easy place and used it only to view my photos. Not knowing any better, I looked in the iPhoto Library folder and found lots of nested numeric folders. Many were empty. It seemed messy, so I consolidated (OOPS) those nasty folders. When I returned to iPhoto, my photos had been replaced with blank placeholders. This brought me to the Apple Discussions, where I learned the golden rule of iPhoto (and any database application): don't change things through the Finder. I put those folders all back and restored the links to all of the photos. It took some time, but I learned a valuable lesson.
Next Mac, iPhoto 5. I had many more photos in my library, since I didn't have to worry about how to file them. I even found all my old picture CDs and imported them to my library. I organized my Film Rolls and preferred film roll view to any other because it gave me a clear picture of my photo inventory. Need that photo from the baby's 2nd birthday? Just scroll to the roll, since rolls are basically chronological. My library was still relatively small and easily manageable.
Then I began to use Albums, but only for special projects. How do I know which photos were cropped 4 x 6 and printed? Because I collected them in an album. Since albums use practically no disc space, this was a great solution. Want to see the best photos from a special birthday? Smart albums are great. I only had to rate the photos, then set up a smart album based on rating and date. Then I could see my best pics from important events. From that, decide which to edit, print, upload, etc.
I had learned how to use Photoshop Elements 3 and was a much improved photo editor. However, I still used the Elements browser to open photos for editing. I saved my edited versions to folders outside of my library and managed them myself. I began to have that old problem of how to locate the best photo...
Bring in the iLife '06 upgrade. Around the same time I upgraded to Elements 4. I thought Bridge was cool, but I couldn't easily browse my iPhoto Library to open a photo. It was very difficult to predict whether the photo I wanted was in Originals or Modified. I came back to the Discussions and read the advice here: +use iPhoto to open the photos for editing in Elements+. It seemed strange at first, but after adding a keyword to identify photos that I have edited in Elements (means I took more time with them) I adjusted to the new workflow. I could edit my photos, identify the edited versions, and know that my originals were still safe if I should need them. No more stragglers and extra duplicates.
After using the one keyword with success, it occurred to me how useful they can be. I went through my entire library and added keywords to the photos. Want to see all photos of my daughter? Just click her name in the keyword pane, and the library is instantly filtered. If I need both kids in the photo, I just click to add his keyword to the filter. Want to exclude myself? (I usually do) Just Option-click my keyword and photos with me are removed from the sort. Need to filter by a special event? Click the birthday or Christmas keyword. It's amazing how many combinations there are using keywords alone. These days I rarely set up Smart Albums, since I can click on keywords for fast, flexible groupings of photos.
I remember my photos by when they were taken. Mostly. But my library keeps growing, and my memory keeps shrinking (alas). So there's the calendar tool. It filters the library by year, month, week, or date. One choice not enough? Shift-click to select a range or command-click to select non-adjacent items. Here's a really cool one: Option-click in the calendar tool to see that time range for every year in the library. Great for finding annual events, even if they aren't keyworded. *It's just so easy to filter the library in different ways, and it doesn't affect the underlying organization of my library.* That's one of the more fun aspects of iPhoto for me - I feel like I have endless flexibility in how I view and group my photos, yet I always go back to my photo inventory in film roll view.
Although I set up iPhoto to open Elements when I double-click, I can still edit in iPhoto by clicking the full-screen edit mode icon in the lower toolbar. This is convenient for a quick crop to a particular aspect ratio. Sometimes Elements is unable to correct the red-eye in a photo, and iPhoto 6 does it better. Elements only has an auto-correct, and when it fails, it fails. In iPhoto 6 there's a trick that turns the cursor into a circle, which can then be placed over the pupil and sized, to precisely define the area for red-eye correction. iPhoto 7 did one better and made this tool easy to access.
Here's a real example of how iPhoto worked for me. Last week we had a death in the family - an aunt. It was sudden, unexpected, and caught us all off-guard. There wasn't much I could do to comfort the family. But I have pictures in my Mac. I quickly filtered my library to locate all my photos of our aunt. I created an album and moved the worthy pictures into it. From the album, I went through and edited in Photoshop Elements. (That part took the longest.) I cropped them all to print dimensions. I printed the best one at 5 x 7 and placed into a frame as a gift. I selected the entire album for printing, loaded the photo paper in my printer, and cranked out a set of 4 x 6 borderless prints that look as good as drug store prints. I placed the prints in a little album and took it to the memorial service. Her daughter had never seen those photos and was touched, so I gave her the album. After all, to recreate it for my kids I only have to select the iPhoto Album, load my printer, and crank out another set.
Another example: One Spring Break I took my kids on a trip to visit my grandparents. While there, we all went to a museum of log cabins and windmills. I took lots of pictures at the museum, figuring I'd make a scrapbook. When I got home I wanted to share my pictures with my grandparents, but didn't want to have to create 2 scrapbooks. So I made a book in iPhoto which told the story of our day at the museum. I ordered one for us and one for my grandparents. It could have taken me weeks to complete a paper album; I did the iPhoto book in a day or two. They were thrilled to receive it, and they still think I am some sort of computer genius. I keep telling them iPhoto made it easy, but they have a PC and just don't get it. That's okay - it's fun being a genius in their eyes.
I hope my rambling answers your question about why I use iPhoto. I also hope that it is not just an endorsement, but answers some of your +technical questions+ about how to use iPhoto. That is, after all, the purpose of this forum. If you have any questions about how I achieved anything that I described here, by all means ask.
Regards.

Why to use SQL Server's native backup facilities, not other backup solution?

I've been asked in my company: why to use SQL Server’s native backup facilities? Instead, they currently rely on other backup software, like Backup Exec, BrightStor, or even Microsoft System Center Data Protection Manager. Those solutions let the
company manage all of its backups—including SQL Server—in a single place, whereas SQL Server’s native backup abilities only apply to SQL Server.
So what does SQL Server native backup facility give us more to be forced to use it?

Satish and Pawan ... thanks but, a backup solution is just there. they don't need to pay anything. even though, having a backup solution that backup everything on the server, like files, software.. etc is needed regardless if you have SQL Server databases
or not, and if it does database backup it would be even better and more complete as a backup solution. So sorry your answer is not an enough reason that will force me to leave that complete backup solution and use the SQL Server backup tools specifically to
backup databases.
Olaf ... thanks as well. But I was just counting a number of solutions that i think they are related to backup things. yet I believe that Symantec backup exec does backup for SQL Server database, ain't?! what I understood from the link that you gave me,
that some backup applications (if not all) use SQL Server backup facilities to do database backup, is what I understood correct? if yes then the question will be, is there any situation or reasons that force me to use SQL Server backup tools even if I have
those backup solution (that some of them in the backgroud they are using SQL Server backup facilities)? does SQL Server backup tool give me more capabilities in backing up databases than what I find in backup solutions?
The answer is NO, as of now you get all these features in 3rd party native backups...
So in nutshell Microsoft never forces you to use SQL Servers Native backup -----The only reason why you get native backup featues is since SQL Server is an Enterprise Solution MS provide you all features in-built within the bundle so that you don't have
to purchase any other license (incase you\your company doesn't have one already)
Sarabpreet Singh Anand
SQL Server MVP Blog ,
Personal website
This posting is provided , "AS IS" with no warranties, and confers no rights.
Please remember to click "Mark as Answer" and "Vote as Helpful" on posts that help you. This can be beneficial to other community members reading the thread.

Why to Use EJB rather then Direct Connection To Oracle Thru webDynpro?

Hi
Experts,
I want to know that why to use EJB to connect to oracle rather then direct connection via WebDynpro.
Please Give Me References to how to connect to oracle with EJB or WebDynpro.I want to tell you that i know JDBC,JAVA and basic web Dynpro.
Please Reply Me Dear Friends...ASAP.

EJB are better for a project beacuse the application is scalable, have less maintainence and have better performance.
Have you gone throght these:
Connect Oracle 9.2 DB to Web AS 6.40
web dynpro - database connection
web Dynpro application connecting to oracle
/people/ramesh.jandhyala/blog/2007/01/02/webdynpro-and-oracle-using-dtos
Regards,
Ashwani Kr Sharma

Why we use logical system

dear all
i want to know why we use logical system .?????????????

Hi Vivek,
Logical system is unique system id to communicate with each SAP Systems in ALE network
You can think the way , you will receive ROLL Number or User ID from college / office even though you have a name your own . Same way sap system need a unique identifier . Most of the time it is followed by naming convention as <SID>CLNT<Clientnumber> . Looks like GPRCLNT100
If you go to Tcode SALE , then you will get the documentation as follows
Logical Systems
The distribution of data between systems makes it necessary to identify each system as a unique logical system.
A logical system is an application system in which the applications are coordinated to work in one common database. In SAP terms, a logical system corresponds to a client.
The logical system is important in the following SAP areas:
Communication between two or more logical systems
ALE business process (e.g. Cost Center Accounting): defines the system in which a particular application is running. Only in this system can master data can be changed.
Regards,
Aparna

Why We Use Databases?

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