What Is Logical File In As400? What Are The Types Of Logical File?

1.	What Is Logical File In As400? What Are The Types Of Logical File?
Answer» Logical file : Logical file does not occupy any memory. ONE or more logical file can be derived from a SINGLE physical file. It simply contains the record selection definition and when accessed retrieves the RECORDS from the physical file to which it REFERS. A logical file can contain up to 32 record formats. It selects records dynamically. It cannot exist without a physical file. We can filter the data with criteria by using SELECT and omit command. A logical file does not contain any data but provides the ‘VIEWS’ of the data to satisfy end-user’s needs. Types of Logical file : There are two types. Non-join logical file Join logical file Logical file : Types of Logical file : There are two types.

Answer»

Logical file :

Logical file does not occupy any memory.
ONE or more logical file can be derived from a SINGLE physical file.
It simply contains the record selection definition and when accessed retrieves the RECORDS from the physical file to which it REFERS.
A logical file can contain up to 32 record formats.
It selects records dynamically. It cannot exist without a physical file.
We can filter the data with criteria by using SELECT and omit command.
A logical file does not contain any data but provides the ‘VIEWS’ of the data to satisfy end-user’s needs.

Types of Logical file : There are two types.

Logical file :

Types of Logical file : There are two types.

Discussion