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.
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.
Related Questions
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.
Assertion. In the result produced by a join query, there may be multiple identical columns in the final result, but not always.
Reason. The join in which only one of the identical columns (coming from the joined tables) exists, is called a Natural join.
What is the difference between HAVING and WHERE clause ?
What is the use of GROUP BY clause ?