Question: Aggregation functions of SQL (sum, avg, count, max, min) are basic aspects of data warehousing. The COUNT function, when used to count the number of

Aggregation functions of SQL (sum, avg, count, max, min) are basic aspects of data warehousing.

The COUNT function, when used to count the number of students, employees, customers, etc., is stored in a database.

When the COUNT function is used incorrectly, it may produce an erroneous result. Your task:

Explain what the issue is and how it can be fixed by using the COUNT function correctly.

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