Câu 45: DA0-001: Data+
A data analyst has been asked to merge the tables below, first performing an INNER JOIN and then a LEFT JOIN:Customer Table - In-store Transactions - Which of the following describes the number of rows of data that can be expected after performing both joins in the order stated, considering the customer table as the m…
Nội dung câu hỏi
A data analyst has been asked to merge the tables below, first performing an INNER JOIN and then a LEFT JOIN:Customer Table - In-store Transactions - Which of the following describes the number of rows of data that can be expected after performing both joins in the order stated, considering the customer table as the main table?
Các lựa chọn
Đáp án được giữ gọn theo nhãn A, B, C, D trong phần bình chọn tương tác.
- A. INNER: 6 rows; LEFT: 9 rows
- B. INNER: 9 rows; LEFT: 6 rows
- C. INNER: 9 rows; LEFT: 15 rows
- D. INNER: 15 rows; LEFT: 9 rows — đáp án hiện tại
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