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What are logical databases? What are the advantages/ dis-advantages of logical databases?
SAP ABAP questions and answers
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18. What are logical databases? What are the advantages/ dis-advantages of logical databases?
To read data from a database tables we use logical database. A logical database provides read-only access to a group of related tables to an ABAP/4 program. Advantages: i)check functions which check that user input is complete, correct,and plausible. ii)Meaningful data selection. iii)central authorization checks for database accesses. iv)good read access performance while retaining the hierarchical data view determined by the application logic. dis advantages: i)If you donot specify a logical database in the program attributes,the GET events never occur. ii)There is no ENDGET command,so the code block associated with an event ends with the next event statement (such as another GET or an END-OF-SELECTION).
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Other Interview Questions
- What is an ABAP?
- What is an ABAP data dictionary?
- What are domains and data element?
- What is foreign key relationship?
- Describe data classes.
- What are indexes?
- Difference between transparent tables and pooled tables.
- What is an ABAP/4 Query?
- What is BDC programming?
- What are the functional modules used in sequence in BDC?
- What are internal tables?
- What is ITS?
- What is DynPro?
- What are screen painter and menu painter?
- What are the components of SAP scripts?
- What is ALV programming in ABAP? When is this grid used in ABAP?
- What are the events in ABAP/4 language?
- What is CTS and what do you know about it?
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- What is a batch input session?
- How to upload data using CATT ?
- What is Smart Forms?
- How can I make a differentiation between dependent and independent data?
- What is the difference between macro and subroutine?
- What is the differrences between structure and table in data dictionary in ABAP?
- What is the difference between collect and sum?
- How we format the data beofore before write statment in report ?
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- What is the differences between ABAP and OOABAP. In which situation we use OOABAP?
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- What is the difference between Type and Like?
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- What is difference between dialog program and a report?
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- How do we debug sapscript?
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- Q: How to lock an user defined transaction for some time during which no user can access the same?
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