A table ‘student’ has 3 columns and 10 rows and another table ‘s – InterviewSolution

InterviewSolution

1.

A table ‘student’ has 3 columns and 10 rows and another table ‘student 2’ has the same columns as student but 15 rows. 5 rows are common in both the tables. If we take union, what is the degree and cardinality of the resultant table ?

Answer»

Degree = 3

Cardinality = 30 (20 + 15 – 5)

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