Answer:
// Summary:
Executes the query, and returns the first column of the first row in the result set returned by the query. Additional columns or rows are ignored.
// Returns:
The first column of the first row in the result set, or a null reference (Nothing in Visual Basic) if the result set is empty.
Executes the query, and returns the first column of the first row in the result set returned by the query. Additional columns or rows are ignored.
// Returns:
The first column of the first row in the result set, or a null reference (Nothing in Visual Basic) if the result set is empty.
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