To answer this question, you need to understand how to calculate the total value of a column in a table using SQL.
Let's go through each option to understand why it is correct or incorrect:
Option A) SELECT ADD(Price) FROM Sales - This option is incorrect because there is no SQL function called ADD that can be used to calculate the total value of a column.
Option B) SELECT TOTAL(Price) FROM Sales - This option is incorrect because there is no SQL function called TOTAL that can be used to calculate the total value of a column.
Option C) SELECT SUM(Price) FROM Sales - This option is correct because the SUM function in SQL is used to calculate the sum of a column. By selecting SUM(Price) FROM Sales, you will get the total value of the 'Price' column in the 'Sales' table.
Option D) SELECT SUM(Price) WHERE Sales - This option is incorrect because the WHERE clause is missing a condition. The WHERE clause is used to filter rows based on a condition, but it needs to be followed by a condition. For example, WHERE Sales > 0. Without a condition, this query is invalid.
The correct answer is C) SELECT SUM(Price) FROM Sales. This option is correct because it uses the SUM function to calculate the total value of the 'Price' column in the 'Sales' table.