System Analysis and Design
A Decision table

gets an accurate picture of the system
represents the information flow
documents rules, that select one or more actions, based on one or more conditions, from a set of possible conditions.
shows the decision paths

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System Analysis and Design
Data Definition Language (DDL)

describes how data are structured in the data base
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
all of the listed here

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