Suppose you have a table with a primary key composed of two columns. When another column in this table is dependent on only one of the two columns in the primary key, this poses a risk for _____.
A) qualification errors
B) update anomalies
C) function splitting
D) functional dependency
Correct Answer:
Verified
Q6: A relation that does not contain any
Q7: In a relational database, _.
A) rows must
Q8: A relational database _.
A) consists of relationships
Q9: One can successfully design a database system
Q10: In this text, Boyce-Codd normal form is
Q12: When the commonly accepted shorthand representation is
Q13: You can determine functional dependence by viewing
Q14: In an entity-relationship (E-R) diagram, tables are
Q15: Which statement describing relations is false?
A) A
Q16: The duplication of data is formally called
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