Computer Science
Assertion. In order to carry out the join operation, there should be a governing condition.
Reason. A join condition may be based on equality, less than, greater than or non-equality.
SQL Joins & Grouping
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Answer
(d)
Assertion is false but Reason is true.
Explanation
In order to carry out the join operation, there should be a governing condition is false. This is because a Cartesian join is an example of a join operation that does not require a specific condition; it combines all rows from one table with all rows from another table without any matching condition. A join condition may be based on equality, less than, greater than, or non-equality depending on the requirements of the query.
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Assertion. The join, in which columns are compared for equality, is called Equi-join.
Reason. The join queries only produce combined rows from tables having some common column, when compared for equality.
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Reason. The join in which only one of the identical columns (coming from the joined tables) exists, is called a Natural join.
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