System Analysis and Design
Data manipulation language (DML)

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

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System Analysis and Design
Direct-access organization

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

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System Analysis and Design
In Decision trees

nodes represent the conditions, with the right side of tree listing the actions to be taken
the branch depends on the condition and decisions to made
the root is drawn on the left and is the starting point on the decision sequence.
All of these
None of these

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