Difference between path and classpath

Difference between path and classpath?

PATH - set of paths there executables will be found.
CLASSPATH - set of paths and archives there class files will be found.

Similar Messages

What is the difference between ojvm and client versions?

Changing the java vm from client to ojvm result in the following error:
Errormessage:
java.lang.UnsatisfiedLinkError: no UniqueC in java.library.path
Project Settings -> Configurations -> Development -> Runner -> Virtual Machine -> ojvm FAILS
Project Settings -> Configurations -> Development -> Runner -> Virtual Machine -> ojvm      RUNS OK.
Project Settings -> Configurations -> Development ->Paths ->Additional Classpath:
C:\jars\xerces.jar;C:\jars\UniqueC.dll;C:\jars\log4j-1.2.8.jar
What is the difference between ojvm and client versions? How can I make ojvm to find UniqueC.dll?
Various version info:
Output from program:
java version:1.4.2_01
java home:C:\programfiler\JAVA\2sdk1.4.2_01\jre
java vm version:9.0.3.738 cdov
Taken from JDeveloper Help About:
Oracle IDE     9.0.3.10.35
UML Modelers Version     9.0.3.9.4
Business Components Version     9.0.3.10.7
java.version     1.3.1_02
java.vm.name     OJVM Client VM
java.vm.version     9.0.3.738 o

However, Adobe offers extra paid services to create PDF or to export PDF to other formats. You are not required to buy them, however.

Difference between ws_download and gui_download

Hi
Can anyone explain briefly the difference between ws_download and gui_download
Thanks in advance
sapien

Hai,
in ws_download is Obsolete in Higher Versions
file type is as follows
PARAMETERS: P_FILE LIKE RLGRAP-FILENAME. "local file with contracts
CALL FUNCTION 'DOWNLOAD'
 EXPORTING
 FILENAME = ' '
 FILETYPE = I_TYPE
 TABLES
 DATA_TAB = T_DOWNLOAD
 EXCEPTIONS
 INVALID_FILESIZE = 1
 INVALID_TABLE_WIDTH = 2
 INVALID_TYPE = 3
 NO_BATCH = 4
 UNKNOWN_ERROR = 5
 GUI_REFUSE_FILETRANSFER = 6
 OTHERS = 7.
in gui_download -->is using instead of 'ws_upload'
file type is as follows
PARAMETERS: P_FILE LIKE STRING. "local file with contracts
DATA: D_FILENAME TYPE STRING,
 D_FILEPATH TYPE STRING,
 D_FULLPATH TYPE STRING,
 L_FILETYPE TYPE CHAR10.
IF L_FILETYPE = 'ASC'.
L_FILETYPE = 'ASC'.
ELSE.
L_FILETYPE = 'DAT'.
ENDIF.
CALL METHOD CL_GUI_FRONTEND_SERVICES=>FILE_SAVE_DIALOG
EXPORTING
 WINDOW_TITLE =
 DEFAULT_EXTENSION =
 DEFAULT_FILE_NAME =
 FILE_FILTER =
 INITIAL_DIRECTORY =
 WITH_ENCODING =
 PROMPT_ON_OVERWRITE = 'X'
 CHANGING
 FILENAME = D_FILENAME
 PATH = D_FILEPATH
 FULLPATH = D_FULLPATH
 USER_ACTION =
 FILE_ENCODING =
EXCEPTIONS
 CNTL_ERROR = 1
 ERROR_NO_GUI = 2
 NOT_SUPPORTED_BY_GUI = 3
 others = 4
IF SY-SUBRC <> 0.
MESSAGE ID SY-MSGID TYPE SY-MSGTY NUMBER SY-MSGNO
 WITH SY-MSGV1 SY-MSGV2 SY-MSGV3 SY-MSGV4.
ENDIF.
IF NOT D_FULLPATH IS INITIAL.
CALL FUNCTION 'GUI_DOWNLOAD'
EXPORTING
BIN_FILESIZE =
 FILENAME = D_FULLPATH
 FILETYPE = L_FILETYPE
APPEND = ' '
WRITE_FIELD_SEPARATOR = ' '
HEADER = '00'
TRUNC_TRAILING_BLANKS = ' '
WRITE_LF = 'X'
COL_SELECT = ' '
COL_SELECT_MASK = ' '
DAT_MODE = ' '
CONFIRM_OVERWRITE = ' '
NO_AUTH_CHECK = ' '
CODEPAGE = ' '
IGNORE_CERR = ABAP_TRUE
REPLACEMENT = '#'
WRITE_BOM = ' '
TRUNC_TRAILING_BLANKS_EOL = 'X'
WK1_N_FORMAT = ' '
WK1_N_SIZE = ' '
WK1_T_FORMAT = ' '
WK1_T_SIZE = ' '
IMPORTING
FILELENGTH =
TABLES
 DATA_TAB = T_DOWNLOAD
FIELDNAMES =
EXCEPTIONS
 FILE_WRITE_ERROR = 1
 NO_BATCH = 2
 GUI_REFUSE_FILETRANSFER = 3
 INVALID_TYPE = 4
 NO_AUTHORITY = 5
 UNKNOWN_ERROR = 6
 HEADER_NOT_ALLOWED = 7
 SEPARATOR_NOT_ALLOWED = 8
 FILESIZE_NOT_ALLOWED = 9
 HEADER_TOO_LONG = 10
 DP_ERROR_CREATE = 11
 DP_ERROR_SEND = 12
 DP_ERROR_WRITE = 13
 UNKNOWN_DP_ERROR = 14
 ACCESS_DENIED = 15
 DP_OUT_OF_MEMORY = 16
 DISK_FULL = 17
 DP_TIMEOUT = 18
 FILE_NOT_FOUND = 19
 DATAPROVIDER_EXCEPTION = 20
 CONTROL_FLUSH_ERROR = 21
 OTHERS = 22

What's the Difference Between OLAP and OLTP?

HI,
What's the difference between OLAP and OLTP ? and which one is Best?
-Arun.M.D

Hi,
The big difference when designing for OLAP versus OLTP is rooted in the basics of how the tables are going to be used. I'll discuss OLTP versus OLAP in context to the design of dimensional data warehouses. However, keep in mind there are more architectural components that make up a mature, best practices data warehouse than just the dimensional data warehouse.
Corporate Information Factory, 2nd Edition by W. H. Inmon, Claudia Imhoff, Ryan Sousa
Building the Data Warehouse, 2nd Edition by W. H. Inmon
With OLTP, the tables are designed to facilitate fast inserting, updating and deleting rows of information with each logical unit of work. The database design is highly normalized. Usually and at least to 3NF. Each logical unit of work in an online application will have a relatively small scope with regard to the number of tables that are referenced and/or updated. Also the online application itself handles the majority of the work for joining data to facilitate the screen functions. This means the user doesn't have to worry about traversing across large data relationship paths. A heavy dose of lookup/reference tables and much focus on referential integrity between foreign keys. The physical design of the database needs to take into considerations the need for inserting rows when deciding on physical space settings. A good book for getting a solid base understanding of modeling for OLTP is The Data Modeling Handbook: A Best-Practice Approach to Building Quality Data Models by Michael C. Reingruber, William W. Gregory.
Example: Let's say we have a purchase oder management system. We need to be able to take orders for our customers, and we need to be able to sell many items on each order. We need to capture the store that sold the item, the customer that bought the item (and where we need to ship things and where to bill) and we need to make sure that we pull from the valid store_items to get the correct item number, description and price. Our OLTP data model will contain a CUSTOMER_MASTER, A CUSTOMER_ADDRESS_MASTER, A STORE_MASTER, AN ITEM_MASTER, AN ITEM_PRICE_MASTER, A PURCHASE_ORDER_MASTER AND A PURCHASE_ORDER_LINE_ITEM table. Then we might have a series of M:M relationships for example. An ITEM might have a different price for specific time periods for specific stores.
With OLAP, the tables are designed to facilitate easy access to information. Today's OLAP tools make the job of developing a query very easy. However, you still want to minimize the extensiveness of the relational model in an OLAP application. Users don't have the wills and means to learn how to work through a complex maze of table relationships. So you'll design your tables with a high degree of denormalization. The most prevalent design scheme for OLAP is the Star-Schema, popularized by Ralph Kimball. The star schema has a FACT table that contains the elements of data that are used arithmatically (counting, summing, averaging, etc.) The FACT Table is surrounded by lookup tables called Dimensions. Each Dimension table provides a reference to those things that you want to analyze by. A good book to understand how to design OLAP solutions is The Data Warehouse Toolkit: Practical Techniques for Building Dimensional Data Warehouses by Ralph Kimball.
Example: let's say we want to see some key measures about purchases. We want to know how many items and the sales amount that are purchased by what kind of customer across which stores. The FACT table will contain a column for Qty-purchased and Purchase Amount. The DIMENSION tables will include the ITEM_DESC (contains the item_id & Description), the CUSTOMER_TYPE, the STORE (Store_id & store name), and TIME (contains calendar information such as the date, the month_end_date, quarter_end_date, day_of_week, etc).
Database Fundamentals > Data Warehousing and Business Intelligence with Mike Lampa
Search Advice from more than 250 TechTarget Experts
Your question may have already been answered! Browse or search more than 25,000 question and answer pairs from more than 250 TechTarget industry experts.

What are the differences between tracing and hierarchical profiler?

There are many terms used by people, I am just wondering what are the differences between tracing and hierarchical profiler? Aren't they the same thing?
Thanks a lot.

Instrumentation and tracing are two different things; in fact they belong to two different categories - one's a thing the other's an activity.
Tracing is following the execution path of a program. Tracing shows us the the calls a program makes, perhaps the internal choices it makes (ifs and whiles), exceptions thrown, etc,
Instrumentation is code we build into our program to produce a record of its status. There are different techniques, from using DBMS_APPLICATION_INFO calls to monitor status to writing log tables or files. Instrumentation can be used to generate a trace; it can do profiling; it can provide information reports on outputs and exceptions.
In my opinion DBMS_TRACE and DBMS_HPROF are not instrumentation, because they are external to the program under investigation, rather than built into it. However, there is an obvious overlap between the insight they provide and what we might do with our own logging.
Cheers, APC
PS
970992 wrote:
you are not a stranger for me.Really? I don't believe we've met. I'm pretty certain I don't know anybody whose name is just a number.

Activity System status: differences between u0093Openu0094 and u0093In processu0094 status

Dear Experts,
Whats the difference between Open and In process system status? In help.sap.com it: There are four system statuses that represent the life cycle of the business transaction:
Open: has been recently created and not yet processed (for example, contract from the Internet)
In process: administrator is clearing up questions
But, how does the system assumes the In Process status ?? Ive tested business activities creation with different employees assigned and, when editing and saving the business activities with these BPs the system status does not change.
However, in other unknown situations the status system is changed to in Process.
Any ideas about the meaning of the In Process status? And when the business activity switches to that?
Thanks in advance,
Joao

Hi,
These four system statuses that represent the life cycle of the business transaction:
·        Open: has been recently created and not yet processed (for example, contract from the Internet)
·        In process: administrator is clearing up questions
·        Released: contract is complete and legal. Follow-up processes can be started (printing, billing, distribution, releases and so on)
·        Completed: All actions directly linked to contract are completed
·        Closed: all actions indirectly linked to the contract are closed (for example, from R/3: batch run to actual costs)
Each status having its own control at the configuration level. If you observe the following process you may understand the importance of various statuses.
For example in any transaction by default status would be Open. Once the transaction opened by the respective responsible person he will change the status as In Process, Once the assigned task is completed he will change the status as Completed.
Please notice the configuration settings in the following navigation path:
SPRO->IMG->CRM->Transactions->Basic Functions->Status Management-> Change Status Profile for User Status->Select Quotation->Double click on the different status. You can observe the difference.
Hope I convinced.
Best Regards,
Johnny.
Reward if it helps.

Difference between sapscripts and BDCs

what is the difference between sapscripts and BDCs

BDC for data communication between sap to non sap(vice-versa)
where scripts is a business layout(we create)
bdc help
They are the only 3 methods mostly we use in BDC.
Call _Dialog is outdated. it is there in the intial stages of SAP.
BDC:
Batch Data Communication (BDC) is the process of transferring data from one SAP System to another SAP system or from a non-SAP system to SAP System.
Features :
BDC is an automatic procedure.
This method is used to transfer large amount of data that is available in electronic medium.
BDC can be used primarily when installing the SAP system and when transferring data from a legacy system (external system).
BDC uses normal transaction codes to transfer data.
Types of BDC :
CLASSICAL BATCH INPUT (Session Method)
CALL TRANSACTION
BATCH INPUT METHOD:
This method is also called as CLASSICAL METHOD.
Features:
Asynchronous processing.
Synchronous Processing in database update.
Transfer data for more than one transaction.
Batch input processing log will be generated.
During processing, no transaction is started until the previous transaction has been written to the database.
CALL TRANSACTION METHOD :
This is another method to transfer data from the legacy system.
Features:
Synchronous processing. The system performs a database commit immediately before and after the CALL TRANSACTION USING statement.
Updating the database can be either synchronous or asynchronous. The program specifies the update type.
Transfer data for a single transaction.
Transfers data for a sequence of dialog screens.
No batch input processing log is generated.
For BDC:
http://myweb.dal.ca/hchinni/sap/bdc_home.htm
https://www.sdn.sap.com/irj/sdn/wiki?path=/display/home/bdc&
http://www.sap-img.com/abap/learning-bdc-programming.htm
http://www.sapdevelopment.co.uk/bdc/bdchome.htm
http://www.sap-img.com/abap/difference-between-batch-input-and-call-transaction-in-bdc.htm
http://help.sap.com/saphelp_47x200/helpdata/en/69/c250684ba111d189750000e8322d00/frameset.htm
http://www.sapbrain.com/TUTORIALS/TECHNICAL/BDC_tutorial.html
Check these link:
http://www.sap-img.com/abap/difference-between-batch-input-and-call-transaction-in-bdc.htm
http://www.sap-img.com/abap/question-about-bdc-program.htm
http://www.itcserver.com/blog/2006/06/30/batch-input-vs-call-transaction/
http://www.planetsap.com/bdc_main_page.htm
call Transaction or session method ?
These are the Function modules used for the Session Method.
BDC_OPEN_GROUP
BDC_INSERT
BDC_CLOSE_GROUP
BDC_DELETE_SESSION to create a session
You can schedule the execution of BDC session using the program RSBDCSUB.
another one call transaction
open dataset
close dataset
reward if it helps u
vijay pawar

What is the fundamental difference between classful and classless routing?

Hello to all,
After reading several RFCs, guides and HOWTOs I am confused by an apparently trivial question - what is the basic, fundamental difference between classful and classless routing?
I am well aware that - said in a very primitive way - the classful routing does not make use of netmasks and instead uses the address classes while the classless routing utilizes the netmasks and does not evaluate the address classes.
However, already in 1985 the RFC 950 (Internet Standard Subnetting Procedure) stated that the networks can be further subnetted using the network mask. Since then the routers are expected to use network masks in the routing decision process in the precise way they use it nowadays. However, if the routers use network masks they are doing the classless routing, aren't they? Where is then the difference if we used to describe the 80's way of routing as a classful routing? Or was it already the classless routing? The RFCs about CIDR came gradually only in 1992 and 1993.
If somebody could give me an insight into the key difference between classful and classless routing (and perhaps into the Internet history, how was the real routing done then) I would be most grateful.
Thank you a lot!
Regards,
Peter

Hello Mohammed,
I am afraid we still have not understood each other ;) I am not looking for the algorithms used to select the best path. I am well aware of them, both Ford-Bellman and Dijkstra, and about their internals. By the way, these algorithms do not have any influence whether the routing is classful or classless because they deal with metrics, not with masks. For example, a classless EIGRP internally uses a distance-vector algorithm, not a SPF algorithm.
I will try to explain once more what is my problem... There are two terms commonly used but badly defined: the classless routing and classful routing. Originally, I have thought that the classful routing works as follows:
- The routing table consists only of classful destination networks (major nets), metrics and respective gateways. No network masks are stored in the table because we are classful, that is, we use exclusively the route classes and all entries in the routing table are already classful.
- When routing a packet, the router looks at its destination IP address and determines the major net of this IP address (that is, the classful network that this IP address belongs to). Then it looks up the corresponding entry in the routing table and sends the packet to the respective gateway.
I thought that the classful routing works in this way. I won't describe the classless routing - both of us know how do the today's routers select the next hop.
However, in the RFCs 917 and 950 which were published in 1985, long ago before the term 'classless routing' was coined, the network mask was already defined and it was stated how the routers should work with it.
Now I am confused. The terms classless addresses and classless routing were defined sometime in 1990's, therefore I assume that the routing before the invention of classless IP assignment can be in fact described as classful. In other words, I thought that the routing that was commonly used in 1980's did not use netmasks and can be described as classful because the notion of classlessness came first in 1990's. But now I see that netmasks were defined in 1985.
Now where am I wrong? Do I understand the classful routing properly as I described it? Is it correct to talk about routing in that era as classful although the netmasks were already in use? Or was it already the classless routing?
Basically I am trying to understand what was called the classful routing if the classless routing is said to be something different.
Mohammed, I am most grateful to you for your patience and suggestions! Thank you indeed.
Regards,
Peter

Difference between ACS and ISE

What is the big difference between the ACS and the ISE? We just purchased an ACS server to start locking down ports on our switches and use the Radius functions to better secure our wireless environment. It has been ordered but not yet arrived. I had a discussion with management today about preventing the IPads / IPhones / Smartphones / etc. of the world from accessing the network. If the user knows the credentials for getting their laptop onto the network then they can use these same credentials to get their IPad on the network. How do we detect and prevent is the current question.
In discussing with others the ISE comes up. The questions now become what is the big difference between this and the ACS. Do they work together or independently since they both seem to have "radius on steroids". Can I configure the ACS to do the same functions? I figure this will have to be something on a MAC address level anyway. Oh and one other thing. My wireless infrastructure is not Cisco.
Off to continue the research path ....
Brent

To put it simply I usually say ACS = RADIUS, ISE = NAC.
ISE will do RADIUS functions as well as NAC functions. Eventually you'll probably see ACS go away and be simply replaced by ISE.
ISE will do posturizing and profiling of a device to see if it truly meets requirements to be on a certain VLAN. For your example if you were to my credentials on my own smart device I would have access. ISE could profile this device to see if it truly is a corporate owned device or not. If it wasn't ISE can switch the network that the device connects to, say a guest network.
ISE can also do captive web portals for wired/wireless guest access.
I wouldn't rely on any type of MAC address authentication as I can easily spoof that.

What's the difference between $APPLTMP and $APPLPTMP

Hi All,
I know we can set $APPLTMP and $APPLPTMP as per requirement.
But I really want to know what is the exact difference between $APPLTMP and $APPLPTMP? Why there are those two variables? What is expected to be set for each?
And are there any relationship between those two variables and concurrent log&output file path?
Thanks,
Xiaofeng

I know we can set $APPLTMP and $APPLPTMP as per requirement.
But I really want to know what is the exact difference between $APPLTMP and $APPLPTMP? Why there are those two variables? What is expected to be set for each?
And are there any relationship between those two variables and concurrent log&output file path?Please see old threads which should answer your question.
Re: apps 11.5.10 Report conc Request ending with error
http://forums.oracle.com/forums/search.jspa?threadID=&q=%24APPLTMP+AND+%24APPLPTMP&objID=c3&dateRange=all&userID=&numResults=15&rankBy=10001
Thanks,
Hussein

Difference between urn and url

what's the difference between urn and url?

What is an URL
An Uniform Resource Locator (URL) is the term used to identify an Internet resource, and can be specified in a single line of text.
What is an URN
An Uniform Resource Name (URN) is the term used to identify an Internet resource, without the use of a scheme, and can be specified in a single line of text.
What is an URI
An Uniform Resource Identifier (URI) is used by a browser to identify a single document, and it too can be specified in a single line of text
The general form of an URL has four parts
A scheme followed by a colon.
Invokes a TCP/IP-based application level protocol
Schemes are: http, https, ftp, news, mailto, file, telnet.
A server name.
A // followed by the host name or IP address of the server
Not needed if the server is the default
news server
mail server
An optional port number. Standard or default port numbers are:
ftp *
ssh 22
telnet 23
smtp 25
gopher 70
http 80
nntp 119
SSL 443
A path.
Consisting of folders and/or files.
May include a file extension which identifies the type of document.
May also include a QUERY_STRING with arguments.
Ftp uses port 20 for data and port 21 for flow control.
DIFFERENCE BETWEEN URN & URI
The idea is that a URL is a mechanical link to a resource's location, where it can be downloaded. For this reason, a URL contains a hostname and a local part, all of which can be resolved anywhere on the Internet.
What a URN tries to do is different. It tries to give a description of a resource without actually pointing at it. For example:
urn:isbn:90-365-17273
URI: is a string that identifies any resource. Indentifying the resource does not necessarily mean we can retrieve it. URI is a superset of URL and URN.
files/reports/marketing/report.html
URL: URI that specify a common Internet protocol such as HTTP or FTP are also called URLs. URL is an informal term an is not used in technical specifications.
http://www.foo.com/files/reports/marketing/report.html
URN: A URN is an identifier the uniquely indentifies a resource but does not specify how to access that resource.
ISBN: 1-930110-59-6
I hope it helps
Best Regards

What is the difference between lap and oltp

HI experts, I want to know the difference between OLAP and OLTP and why OLTP cannot be used in bw instead of OLAP? Need realtime anwsers please!!!!!!!!!!

hi navin...
Online transactional processing (OLTP) is designed to efficiently process high volumes of transactions, instantly recording business events (such as a sales invoice payment) and reflecting changes as they occur.
Online analytical processing (OLAP) is designed for analysis and decision support, allowing exploration of often hidden relationships in large amounts of data by providing unlimited views of multiple relationships at any cross-section of defined business dimensions.
OLTP databases are typically input sources for data warehouses or data marts. The data warehouse in turn is the typical source of data for an OLAP database. The value in an OLAP database is that many complex calculations and predefined queries are preprocessed and results are stored and are available via an OLAP exploitation application allowing quick access to cross-sections of business data. Rapid access to the aggregate information across defined business dimensions allows quick navigation and understanding of relationships.
The challenge is to find a solution that will both supply the necessary functionality while addressing the technical considerations of your organization. Some other important considerations include choosing technologies that can leverage existing investments in both hardware and software, and are open and integrated so that your applications are adaptable. This ensures flexibility and agility to meet future business demands.
There are several different modeling techniques. Snowflake and star schemas are just two of many choices. Deciding the best approach for your situation will depend on several factors, most importantly understanding the business issue, the users and their information needs. There is a wealth of information available, including courses, texts and guidelines on this subject alone
OLAP systems organize data in a multidimensional model that is suitable for decision support. OLAP is the analytical counterpart of OLTP, or Online Transactional Processing. SAP's BW is an OLAP system
The Impact of the OLAP/OLTP Cultural Conflict on Data Warehousing....check this link....
http://www.georgetown.edu/users/allanr/Impact.pdf
also check...
http://expertanswercenter.techtarget.com/eac/knowledgebaseAnswer/0,295199,sid63_gci977813,00.html
The big difference when designing for OLAP versus OLTP is rooted in the basics of how the tables are going to be used. I'll discuss OLTP versus OLAP in context to the design of dimensional data warehouses. However, keep in mind there are more architectural components that make up a mature, best practices data warehouse than just the dimensional data warehouse.
Corporate Information Factory, 2nd Edition by W. H. Inmon, Claudia Imhoff, Ryan Sousa
Building the Data Warehouse, 2nd Edition by W. H. Inmon
With OLTP, the tables are designed to facilitate fast inserting, updating and deleting rows of information with each logical unit of work. The database design is highly normalized. Usually and at least to 3NF. Each logical unit of work in an online application will have a relatively small scope with regard to the number of tables that are referenced and/or updated. Also the online application itself handles the majority of the work for joining data to facilitate the screen functions. This means the user doesn't have to worry about traversing across large data relationship paths. A heavy dose of lookup/reference tables and much focus on referential integrity between foreign keys. The physical design of the database needs to take into considerations the need for inserting rows when deciding on physical space settings. A good book for getting a solid base understanding of modeling for OLTP is The Data Modeling Handbook: A Best-Practice Approach to Building Quality Data Models by Michael C. Reingruber, William W. Gregory.
Example: Let's say we have a purchase oder management system. We need to be able to take orders for our customers, and we need to be able to sell many items on each order. We need to capture the store that sold the item, the customer that bought the item (and where we need to ship things and where to bill) and we need to make sure that we pull from the valid store_items to get the correct item number, description and price. Our OLTP data model will contain a CUSTOMER_MASTER, A CUSTOMER_ADDRESS_MASTER, A STORE_MASTER, AN ITEM_MASTER, AN ITEM_PRICE_MASTER, A PURCHASE_ORDER_MASTER AND A PURCHASE_ORDER_LINE_ITEM table. Then we might have a series of M:M relationships for example. An ITEM might have a different price for specific time periods for specific stores.
With OLAP, the tables are designed to facilitate easy access to information. Today's OLAP tools make the job of developing a query very easy. However, you still want to minimize the extensiveness of the relational model in an OLAP application. Users don't have the wills and means to learn how to work through a complex maze of table relationships. So you'll design your tables with a high degree of denormalization. The most prevalent design scheme for OLAP is the Star-Schema, popularized by Ralph Kimball. The star schema has a FACT table that contains the elements of data that are used arithmatically (counting, summing, averaging, etc.) The FACT Table is surrounded by lookup tables called Dimensions. Each Dimension table provides a reference to those things that you want to analyze by. A good book to understand how to design OLAP solutions is The Data Warehouse Toolkit: Practical Techniques for Building Dimensional Data Warehouses by Ralph Kimball.
Example: let's say we want to see some key measures about purchases. We want to know how many items and the sales amount that are purchased by what kind of customer across which stores. The FACT table will contain a column for Qty-purchased and Purchase Amount. The DIMENSION tables will include the ITEM_DESC (contains the item_id & Description), the CUSTOMER_TYPE, the STORE (Store_id & store name), and TIME (contains calendar information such as the date, the month_end_date, quarter_end_date, day_of_week, etc).
Database Fundamentals > Data Warehousing and Business Intelligence with Mike Lampa
Search Advice from more than 250 TechTarget Experts
Your question may have already been answered! Browse or search more than 25,000 question and answer pairs from more than 250 TechTarget industry experts.
hope it helps...

Difference between Null and null?

What is the difference between null and NULL?
When is each used?
Thanks,

veryConfused wrote:
There is a null in java, but no NULL. null means no value. However, when assigning value, the following is different:Although the empty String has no special role. Null means, the referential type is not assigned (doesn't refer) to a specific object. The empty String is just another object though, so seeing it or pointing it out as something special when it actually isn't at all (no more special than new Integer(0) or new Object[0]) just adds to the confusion.

Difference between GUI_UPLOAD and WS_UPLOAD

Hi,
Please make me clear about the difference between GUI_UPLOAD and WS_UPLOAD. In which cases we need to use these modules...??
Thanks,
Satish

I would suggest to always use the GUI_UPLOAD. I say this because this is the function module which is used in the GUI_UPLOAD method of the class CL_GUI_FRONTEND_SERVICES.   Really, you should probably use the class/method instead of the function module.
data: filename type string.
filename = p_file.
call method cl_gui_frontend_services=>gui_upload
         exporting
              filename                = filename
              filetype                = 'ASC'
         changing
              data_tab                = iflatf
         exceptions
              file_open_error         = 1
              file_read_error         = 2
              no_batch                = 3
              gui_refuse_filetransfer = 4
              no_authority            = 6
              unknown_error           = 7
              bad_data_format         = 8
              unknown_dp_error        = 12
              access_denied           = 13
              others                  = 17.
Regards,
Rich Heilman

Difference between char and varchar, also the difference between varchar2

Hi,
Can anyone explain me the difference between char and varchar, and also the difference between varchar and varchar2...

Varchar2 is variable width character data type, so if you define column with width 20 and insert only one character to tis column only, one character will be stored in database. Char is not variable width so when you define column with width 20 and insert one character to this column it will be right padded with 19 spaces to desired length, so you will store 20 characters in the dattabase (follow the example 1). Varchar data type from Oracle 9i is automaticlly promoted to varchar2 (follow example 2)
Example 1:
SQL> create table tchar(text1 char(10), text2 varchar2(10))
2 /
Table created.
SQL> insert into tchar values('krystian','krystian')
2 /
1 row created.
SQL> select text1, length(text1), text2, length(text2)
2 from tchar
3 /
TEXT1 LENGTH(TEXT1) TEXT2 LENGTH(TEXT2)
krystian 10 krystian 8
Example 2:
create table tvarchar(text varchar(10))
SQL> select table_name,column_name,data_type
2 from user_tab_columns
3 where table_name = 'TVARCHAR'
4 /
TABLE_NAME COLUMN_NAME DATA_TYPE
TVARCHAR TEXT VARCHAR2
Best Regards
Krystian Zieja / mob

Difference between path and classpath

Similar Messages

Maybe you are looking for