Logical data base and work process

I have some questions on the above topics.
if some have an answer, let me know .
1. How many logical data bases can we use in our
report program
2. How to design our own selection screen when
using
logical database
3. How mnay update workprocesses can u have.
Thanks in advance.
Regards,
Roberts.K

Welcome to the forum!
In response to question 1:
You can designate only 1 LDB on the Attribute screen of the program. You can however, also invoke a LDB program using Function Module LDB_PROCESS. There is some good documentation associated with it.
In response to question 2:
If you specify a LDB on your program attributes, the LDB will present a selection screen. Any parameters/select options that you specify in your program are added to the selection screen that the LDB presents. If you use the Function Module mentioned above, then you alone will control the selection screen and have to pass selection information to the function module.
In response to question 3:
I am not quite sure what you mean by this one, but if some of the other SDNers have answered your question, then no need to clarify for me.

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What is logical data base and how it is differfrom DDIC AND DATABASE

HI ,
CAN ANY BODY HELP ME TO FIND THIS

Hi
A logical database is a special ABAP/4 program which combines the contents of certain database tables. You can link a logical database to an ABAP/4 report program as an attribute. The logical database then supplies the report program with a set of hierarchically structured table lines which can be taken from different database tables.
LDB offers an easy-to-use selection screens. You can modify the pre-generated selection screen to your needs. It offers check functions to check whether user input is complete, correct, and plausible. It offers reasonable data selections. It contains central authorization checks for data base accesses. Enhancements such as improved performance immediately apply to all report programs that use the logical database.
Less coding s required to retrieve data compared to normal internel tables.
Tables used LDB are in hierarchial structure.
Mainly we used LDBs in HR Abap Programming.
Where all tables are highly inter related so LDBs can optimize the performance there.
Check this Document. All abt LDB's
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.highlightedcontent?documenturi=%2flibrary%2fabap%2fabap-code-samples%2fldb+browser.doc
GO THROUGH LINKS -
http://www.sap-basis-abap.com/saptab.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9bfa35c111d1829f0000e829fbfe/content.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/frameset.htm
http://help.sap.com/saphelp_nw04/helpdata/en/c6/8a15381b80436ce10000009b38f8cf/frameset.htm
/people/srivijaya.gutala/blog/2007/03/05/why-not-logical-databases
Re: **LDB**
www.sapbrain.com/FAQs/TECHNICAL/SAP_ABAP_Logical_Database_FAQ.html
www.sap-img.com/abap/abap-interview-question.htm
www.sap-img.com/abap/quick-note-on-design-of-secondary-database-indexes-and-logical-databases.htm
http://help.sap.com/saphelp_nw04/helpdata/en/9f/db9b5e35c111d1829f0000e829fbfe/content.htm
http://help.sap.com/saphelp_nw2004s/helpdata/en/9f/db9bb935c111d1829f0000e829fbfe/content.htm
Gothru the blog which provides info on LDB's:
/people/srivijaya.gutala/blog/2007/03/05/why-not-logical-databases
<b>Reward points for useful Answers</b>
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Tables :pernr
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00002 like t_0002.
START-OF-SELECTION.
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Hi there. I'm not sure what version you are on, but in ERP 2005 this is an obsolete statement. Here's an alternate way to get the information you're looking for:
TABLES: PERNR.
INFOTYPES: 0002.
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RP-PROVIDE-FROM-LAST P0002 space sy-datum sy-datum.
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Link to picture
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Moderator note; picture(s) totalling >50K converted to link(s) Forum Rules

hi adilsefaersan,
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By opening your Device Manager right click on one unknown device and choose properties,
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Logical data base and work process

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