Question: Consider the SQL query in Figure 1 - 2 0 . How is Sales to Date calculated? How would the query have to change if

Consider the SQL query in Figure 1-20.
How is Sales to Date calculated?
How would the query have to change if Helen Jarvis wanted to see the results for all of the product lines, not just the Home Office product line?
The part of the query starting with WHERE (the so called WHERE clause) has two different types of conditionsthe last one is clearly different from the first three. Explain how.

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