A heap file, sometimes called a pile or serial file is the simplest type of file
organization, records are placed in the file in the same order as they were
inserted
An index structure is associated with a search key and contains records
consisting of the key value and the address of the logical record
A sorted data file with a primary index is called an indexed sequential file
The file containing the logical records is called the data file and the file
containing the index records is called the index file. The values in the
index file are ordered according to the indexing field.
Kavungya answered the question on June 25, 2019 at 08:16
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