What is the difference between olap and data warehouse..?

Hi All,
Is their any difference between olap and data warehouse..? Please let me know your knowledge about these. Thank you..
------------------------------------------------------------------------ Please mark it as complete, if you get the solution with this reply. TQ.

A data warehouse is a database containing data that usually represents the business history of an organization. This historical data is used for analysis. Data in a data warehouse is organized to support analysis rather than to process real-time transactions
as in online transaction processing systems (OLTP).
OLAP technology enables data warehouses to be used effectively for online analysis, providing rapid responses to iterative complex analytical queries. OLAP's multidimensional data model and data aggregation techniques organize and summarize large amounts
of data so it can be evaluated quickly using online analysis and graphical tools.
Reference:
http://technet.microsoft.com/en-us/library/aa197903(v=sql.80).aspx
http://stackoverflow.com/questions/18916682/data-warehouse-vs-olap-cube
If this post answers your query, please click "Mark As Answer" or "Vote as Helpful".

Similar Messages

  • 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 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...

  • What is the difference between exists and in

    hi all
    if i have these queries
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    and
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    what is the difference between exists and in is that only when i use in i have to bring the field name or what.... i mean in a complex SQL queries is it will give the same answer
    Thanks

    You get two entirely different result sets that may be the same. Haah! What do I mean by that.
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    TABLE_NAME
    BAR
    FOO
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    SQL> select table_name from user_tables where table_name in (select table_name from user_tables where table_name = 'FOO');
    TABLE_NAME
    FOO
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    SQL> select table_name from user_tables where exists(select table_name from user_tables where table_name = 'FOO');
    TABLE_NAME
    BAR
    FOO
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    WHERE EXISTS can be useful for something like testing if we have data, without actually having to return columns.
    So, if you want to see if an employee exists you might say
    SELECT 1 FROM DUAL WHERE EXISTS( select * from emp where empid = 10);
    If there is a row in emp for empid=10, then you get back 1 from dual;
    This is what I call an 'optimistic' lookup because the WHERE EXISTS ends as soon as there is a hit. It does not care how many - only that at least one exists. It is optimistic because it will continue processing the table lookup until either it hits or reaches the end of the table - for a non-indexed query.

  • What is the difference between, DSO and DTP in BI 7.0

    Hi Guru's
    what is the difference between, DSO and DTP in BI 7.0 , how it will come the data from r/3 to BI 7.0, can u discribe?
    points will be assined?
    Thanks & Regards,
    Reddy.

    Hi,
    The data will be replicated in the same way as we do in 3.5.
    Activating, and Transporting the same DS in BW, and Replicating them in BW from R/3.
    First you need to know Diff b/w 3.5 nd 7.0, for that check the below doc's:
    http://help.sap.com/saphelp_nw04s/helpdata/en/a4/1be541f321c717e10000000a155106/content.htm
    blogs:
    /people/sap.user72/blog/2004/11/01/sap-bi-versus-sap-bw-what146s-in-a-name
    Re: How to identify Header, Item and Schedule item level data sources?
    For Transformations in BI:
    http://help.sap.com/saphelp_nw70/helpdata/en/33/045741c0c28447e10000000a1550b0/frameset.htm
    http://help.sap.com/saphelp_nw70/helpdata/en/f8/7913426e48db2ce10000000a1550b0/frameset.htm
    http://help.sap.com/saphelp_nw70/helpdata/en/a9/497f42d540d665e10000000a155106/frameset.htm
    For DTP:
    DTP:
    http://help.sap.com/saphelp_nw70/helpdata/en/20/a894ed07e75648ba5cf7c876430589/frameset.htm
    For DSO:
    Data Store Objects:
    http://help.sap.com/saphelp_nw70/helpdata/en/f9/45503c242b4a67e10000000a114084/frameset.htm
    Reg
    Pra

  • What is the difference between upgradation and migration.

    Hi Guru's
    what is the difference between upgradation and migration.
    actuallly i involved in upgradation project, here my role is
    1. first i check the query's in 3.5 save the query and transport the query. and check the query in bex analyzer also.
    2. go to BI .7  find the query;s ,give the query name and save the query ,
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        come to 7.0 check the query in analyzer also.
    i am having littile bit confusion, how it will comes query in 7.0, why are u saving the query's in 3.5 and 7.0
    query's already available in 7.0 why are u doing this work?
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    infoobje , transferrules, transferstructure ,infosoure, datasoure,updaterules, ods, cubes.
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    prabhavathi

    Hi,
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    If your taling about migration in that level meaning as a part of larger upgradation (in your case 3.x to 7) there may be many places where you need to do this kind of activities.
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    Thanks,
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  • What's the difference between "PreparedStatement" and "Statement"?

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    what are the differences between trigger and constraints?

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  • What is the difference between  ABAP and HR-ABAP?

    Hi people,
    Could u just tel me abt what is the difference between ABAP and HR-ABAP?
    Thanks in advance,
    Sanjeev K.V

    Hi Sir ,
    Please have a look below .Hope it is suitable and simpler solution for your question.
    Please do reward if useful.
    Thankx.
    HR deals with the INFOTYPES which are similar to Tables in General ABAP.
    There are different ways of fetching data from these infotypes.
    There are different areas in HR LIKE Personal Admn, Orgn Management, Benefits, Time amangement, Event Management, Payroll etc
    Infotypes for these areas are different from one another area.
    storing of records data in each type of area is different
    LDBS like PNP are used in HR programing.
    Instead of Select.. we use some ROUTINES and PROVIDE..ENDPROVIDE.. etc
    and in the case of Pay roll we use Clusters and we Import and Export them for data fetching.
    On the whole Normal ABAP is different from HR abap.
    Also,
    HR:
    HR deals with the INFOTYPES which are similar to Tables in General ABAP.
    There are different ways of fetching data from these infotypes.
    There are different areas in HR LIKE Personal Admn, Orgn Management, Benefits, Time amangement, Event Management, Payroll etc
    Infotypes for these areas are different from one another area.
    storing of records data in each type of area is different
    LDBS like PNP are used in HR programing.
    Instead of Select.. we use some ROUTINES and PROVIDE..ENDPROVIDE.. etc
    and in the case of Pay roll we use Clusters and we Import and Export them for data fetching.
    On the whole Normal ABAP is different from HR abap.
    For Personal Admn the Infotypes start with PA0000 to PA1999
    Time Related Infotypes start with PA2000 to PA2999.
    Orgn related Infotypes start with HRP1000 to HRP1999.
    All custom developed infotypes stsrat with PA9000 onwards.
    In payroll processing we use Clusters like PCL1,2,3 and 4.
    Instead of Select query we use PROVIDE and ENDPROVIDE..
    You have to assign a Logical Database in the attributes PNP.
    Go through the SAp doc for HR programming and start doing.
    http://www.sapdevelopment.co.uk/hr/hrhome.htm
    See:
    http://help.sap.com/saphelp_46c/helpdata/en/4f/d5268a575e11d189270000e8322f96/content.htm
    sites regarding hr-abap:
    http://www.sapdevelopment.co.uk/hr/hrhome.htm
    http://help.sap.com/printdocu/core/Print46c/en/data/pdf/PAPA/PAPA.pdf
    http://help.sap.com/printdocu/core/Print46c/en/data/pdf/PAPD/PAPD.pdf
    http://help.sap.com/printdocu/core/Print46c/en/data/pdf/PYINT/PYINT_BASICS.pdf
    http://www.atomhr.com/training/Technical_Topics_in_HR.htm
    http://www.planetsap.com/hr_abap_main_page.htm
    You can see some Standard Program examples in this one ...
    http://www.sapdevelopment.co.uk/programs/programshr.htm
    http://searchsap.techtarget.com/originalContent/0,289142,sid21_gci1030179,00.html?Offer=SAlgwn12604#Certification
    http://www.erpgenie.com/faq/hr.htm.
    http://www.planetsap.com/hr_abap_main_page.htm
    http://www.sapbrain.com/TUTORIALS/FUNCTIONAL/HR_tutorial.html
    These are the FAQ's that might helps you as well.
    http://www.sap-img.com/human/hr-faq.htm
    http://www.sapgenie.com/faq/hr.htm
    http://www.planetsap.com/hr_abap_main_page.htm
    http://www.atomhr.com/library_full.htm
    HR Long texts Upload
    Look at the below link
    And finally,
    Few notes are below:
    InfoSets in the HR Application
    You can use SAP Query in HR to report on HR data. Queries are maintained as described in Creating Queries. The special features of queries created for HR are described in Maintaining Queries in the Human Resources Application. The maintenance procedure for HR InfoSets differs from the described procedure inasmuch as HR data fields are grouped together in infotypes.
    InfoSet management in SAP Query is also used for InfoSet Query. For further information, see Functions for Managing InfoSets.
    If you want to create InfoSets for HR, you can use logical databases PNP, PNPCE, PAP, and PCH (see HR Logical Databases). The database you must use to create your InfoSet depends on the component in which the data you want to report on is stored.
    The reports you can execute using InfoSets based on logical databases PNP (or PNPCE) or PCH are similar, but differ in that they can select different objects. The following table describes the connection between the logical database, and the infotypes you can include in an InfoSet. It also provides you with one or two examples of reports that you can execute using the appropriate InfoSets.
    Logical database PNP/PNPCE* PCH PAP
    Selection of Persons Objects from Personnel Planning Applicants
    Infotypes that can be included in the InfoSet Infotypes for· Personnel Administration (0000-0999) · Time Management (2000-2999) · Payroll infotypes · Infotypes for Personnel Planning objects that can be related to persons If the object type is specified:· Infotypes for the object type · Infotypes for objects that can be related to the specified object typeIf the object type is not specified:· All infotypes · Infotypes for Recruitment (4000-4999)· Some infotypes for Personnel Administration (such as 0001 and 0002)
    · Customer infotypes
    Reporting examples · Selection of all persons who participated in a specific business event, output of prices for reserved business events · Selection of all persons assigned to a specific personnel area, output of qualifications held by these persons · Selection of all business events held in London in March, output of all persons who participated in these business events · Selection of all positions assigned to a specific organizational unit, output of all persons assigned to the positions · Selection of all applicants hired last year to work on special projects, output of addresses for the applicants selected
    Logical database PNPCE (PNP Concurrent Employment) functions just like logical database PNP. The procedure for creating InfoSets is also the same. It only becomes significant if you work with Concurrent Employment.
    Creating InfoSets
    The maintenance procedure for HR InfoSets differs from the procedure described so far in this section inasmuch as HR data fields are grouped together in infotypes. To set up an InfoSet for the HR application, proceed as follows:
    1. On the initial screen for maintaining InfoSets, enter a name for the InfoSet and choose Create.
    2. On the next screen, enter a name for the InfoSet and select one of the HR logical databases in accordance with your reporting requirements.
    Customer infotypes can be created on all HR logical databases. In each individual case, therefore, you must decide which database to select so that you can report on customer infotypes.
    This screen enables you to enter an authorization group. All of the queries that are subsequently created using this InfoSet can only be executed by persons who have this authorization group.
    3. Choose .
    This takes you to the Infotype Selection for InfoSet  screen. You now have the option of creating field groups and assigning fields as required for non-HR InfoSets. Field groups that correspond to infotypes and already contain fields, however, are always created for HR InfoSets. The field groups are displayed in an overview tree in the top right section of the screen.
    The infotypes that you included in the InfoSet are displayed in an overview tree on the left of the screen. The infotype fields that are already included in field groups are displayed in a different color, and the corresponding field group ID is displayed.
    In the standard system, a field group is created automatically for each infotype that you included in the InfoSet (a field group corresponds to an infotype).
    In the standard system, each field group contains the infotype-specific fields. To ensure that working with the InfoSet is as easy as possible, you are advised to restrict your use of fields in each field group to those you really require. This means you should remove fields that are not required.
    An infotype's fields must only be assigned to the pertinent field group. Make sure this assignment is correct. If the assignment is incorrect, the InfoSet could be rendered unusable.
    When an InfoSet is created, the following fields are transferred automatically to the first field group:
    § Logical database PNPCE or PNP Personnel number
    § Logical database PAP Applicant number
    § Logical database PCH Object ID, plan version, and object type
    6. Determine the fields that must be included in the field groups of your InfoSet. If you require further information, see Assigning Fields to a Field Group.
    If you want, you can change the default sequence of field groups and fields as required using Drag&Drop.
    7. To save the InfoSet, choose .
    8. To generate the InfoSet, choose .
    On the Change InfoSet (InfoSet name) screen, you can choose Edit ® Change infotype selection to add more infotypes to the InfoSet, or to remove infotypes from the InfoSet. Remember to regenerate the InfoSet afterwards.
    This screen also enables you to update InfoSets if, for example, the system contains new additional fields for specific key values. To do so, choose InfoSet ® Additional functions ® Update additional HR fields.
    9. Go back to the initial screen for InfoSet maintenance.
    10. Choose User group assignment.
    11. Select a user group, and save your entry.
    sample code
    START-OF-SELECTION.
    GET pernr.
    rp_provide_from_frst p0000 space pn-begda pn-endda.
    if pnp-sw-found EQ '1'.
    READ TABLE p0001 WITH KEY pernr = p0000-pernr.
    if sy-subrc = 0.
    write : p0001-plans. " earliest.
    endif.
    endif.
    rp_provide_from_last p0014 space pn-begda pn-endda.
    if pnp-sw-found EQ '1'.
    READ TABLE p0014 WITH KEY pernr = p0000-pernr.
    if sy-subrc = 0.
    write : p0014-LGART. .
    endif.
    endif.

  • Hi guru's what is the difference between table and temlate in smartforms

    hi guru's what is the difference between table and temlate in smartforms

    Hi Vasu,
    Template is used for proper allignment of data which table is used for displaying multiple data.
    We can say Template is for static data and Table is for dynamic data.
    Suppose we have a requirement in which we have to allign the customer address in such a way as shown below:-
    Name- Vasu Company- WIPRO Location- Chennai
    Desig- S/W Native - Mumbai
    Then for proper allighnment we can create a template and split that into 3 columns and 2 rows and create text elements for each cell display a proper allighned data at the output.
    When we include a template inside a loop it gives the same property as a table.
    When we have mutiple data which is to be extended to the next page like when we display all employee details in a company we use table.
    Table has 3 sections , HEADER, ITEM ,FOOTER
    The header secntion will be executed once and it will loop at the item level. at the end footer will be executed.
    Hope this gives u some idea..
    <b>Please reward if useful</b>
    Regards,
    sunil kairam.

  • What is the difference between ALE and EDI

    Hi,
    Can any one please explain what is the difference between ALE and EDI ?
    Thanks in advance.
    Ramana

    Hi Ramana
    ALE: used to trnasfer IDOC with in the R3distributed system.
    EDI: used to transfer IDOC from R3system to nonsap system
    IDOCS:
    IDOCS are intermediary documents which are like CARRIERS of the data
    IDOCs are safe to transfer data, but less volume of data. User is not allowed to access (modify) the data like PSA. IDOCs have 3 parts.
    1. Control Record - SOURCE & TARGET details,
    EDI
    EDI concept in SD: the EDI concept is intended to realize the sales and distribution process completely automatically with the help of electronical documents. These documents are sent from one customer to another, are processed mostly on the background and give a possibility to realize the sales process extremely efficiently.
    While IDocs have to be understood as a data exchange protocol, EDI and ALE
    are typical use cases for IDocs. R/3 uses IDocs for both EDI and ALE to
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    check these links also
    EDI document
    http://expertanswercenter.techtarget.com/eac/knowledgebaseAnswer/0,295199,sid63_gci983331,00.html
    http://searchsap.techtarget.com/loginMembersOnly/1,289498,sid21_gci879631,00.html?NextURL=http%3A//searchsap.techtarget.com/ateQuestionNResponse/0%2C289625%2Csid21_gci879631%2C00.html
    http://sapabap.iespana.es/sapabap/sap/faq/ale_idocs_bapi.htm
    Reward all helpfull answers
    Regards
    Pavan

  • What is the difference between infocube and fact table?

    hi bw gurus,
    what is the difference between infocube and fact table?
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