Relational Database Management System (RDBMS) Question:

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Spurious tuples may occur due to?

RDBMS Interview Question
RDBMS Interview Question

Answer:

i. Bad normalization
ii. Theta joins
iii. Updating tables from join
a) i & ii b) ii & iii
c) i & iii d) ii & iii

(a) i & iii because theta joins are joins made on keys that are not primary keys.

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A B C is a set of attributes. The functional dependency is as follows
AB -> B
AC -> C
C -> B?
Tables derived from the ERD?