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Suppose we have two tables, Student (std_id, std-name, age, dept_id). Department (dept_id, dept_name, total_student) A JOIN operation between these two tables is needed when we

Suppose we have two tables, Student (std_id, std-name, age, dept_id). Department (dept_id, dept_name, total_student) A JOIN operation between these two tables is needed when we need to retrieve all student names as well as the department name. If the tables are big, joins on tables can take an excessively long time. How can we optimize it?

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