Answer / tulasi harideep

LF doesn't hold any data it is just an access path.Data is present in a physical file which is shown by a logical file based on its key and access paths.When there is no data in PF we cant see any data in LF as well.

Hope you got my answer

When u create a PF and did not fill up Maint parameter, then by default which access path will the system take & why

2 Answers   HCL,

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how to know total no of records in pf with out using sql??????

3 Answers  

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what is dynslt and why we use that command when do we use command

2 Answers   Active Brains, UHG,

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1. How can I create a LF using crtlf command based on a particular member in a multimember PF? Where I have to specify the member name? 2. How to differentiate between the types of join from a Join logical file DDS. Is it possible to have different types of Join Logical files? 3.Any performance difference between Opnqrf and Embedded SQL? When I should prefer Opnqryf and when SQL? 4. I know access path is the path chosen by the program to retrieve data. It can be of keyed access path or arrival sequence. *IMMED- *IMMED description says access path is updated each time record is added or deleted from a member. - What is updating here? *REBLD - The access path is completely rebuilt each time a file member is opened. The access path is maintained until the member is closed, then the access path is deleted. - I am not able to understand this completely. Could anyone explain these more clearly? 5.What is the purpose of using activation group. I know it is a resource allocator, but other than this any other benefits of using an activation group?

2 Answers   IBM,

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one physical file can have how many max of logical files? what is the primary file?

3 Answers   Four soft,

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How to know logical file belongs to which physical file without source?

1 Answers  

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How we can't update join logical files?

10 Answers  

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can we concate fileds in physical file? If yes how can we do?

5 Answers   Patni,

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what is the intractive job? what is the batch job ? how to change the batch job to interactive job?

2 Answers   Four soft,

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how can we write LF using flatfile.

9 Answers  

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What is the interactive job? What is the batch job?

0 Answers  

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How to update physical file using logical file with example?

0 Answers  

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