Database Redesign
The process of reading a database schema and producing a data model from that schema is known as:

data modeling.
reverse engineering.
database design.
None of these

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Database Redesign
The EXISTS keyword will be true if:

all rows in the subquery fail the condition only.
any row in the subquery meets the condition only.
neither of these two conditions is met.
both of these two conditions are met.

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