System Analysis and Design
Indexed-Sequential organization

has records placed randomly throughout the file
stores records sequentially but uses an index to locate records
means storing records in contiguous blocks according to a key
uses an index for each key type

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System Analysis and Design
Data manipulation language (DML)

all of the listed here
determine how data must be structured to produce the user's view
describes how data are structured in the data base
specifies for the DBMS what is required; the techniques used to process data

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