Question

A table 'game1' has 3 columns and 20 rows and another table 'game2' has the same column as game1 (ie 3) and 15 rows. 5 rows are common in both the table. If we take union, what is the degree and cardinality of the resultant table?

Answer 1

Degree: Both tables have 3 columns, so the union has degree 3.

Cardinality: Duplicate rows are removed.

[20 + 15 − 5 = 30]

Final answer: Degree = 3; Cardinality = 30.