In the era before the database was used, there were constraints on storage media, where records on the magnetic tape had to be processed sequentially. Therefore look for a way out by leading to a logical organization (logical organization) that is integrating data from several different physical locations and is the way users view data. Furthermore, various ways are developed to meet these needs by using logical integration, ie using inverted files and linked lists.
An inverted file is a file stored in a particular sequence and is designed to solve a problem in the form of a manager request for a report that only records certain records of the file.
Linked list is a field that contains links or pointers. The file that contains the link field is called a linked list and avoids the use of the index to gain faster access.
Inverted files and linked lists provide a way to logically integrate physically distributed records in a single file.
Logical integration between multiple files. A COBOL programming language modification by using links to link records in one file with logically related records in other files. This system is called IDS (integrated data store) and is the first step towards an integrated database of multiple files.
An inverted file is a file stored in a particular sequence and is designed to solve a problem in the form of a manager request for a report that only records certain records of the file.
Linked list is a field that contains links or pointers. The file that contains the link field is called a linked list and avoids the use of the index to gain faster access.
Inverted files and linked lists provide a way to logically integrate physically distributed records in a single file.
Logical integration between multiple files. A COBOL programming language modification by using links to link records in one file with logically related records in other files. This system is called IDS (integrated data store) and is the first step towards an integrated database of multiple files.
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