题目
题目
单项选择题

Question at position 45 COUNT(*) tallies only those rows that contain a value, while COUNT counts all rows.TrueFalse

选项
A.True
B.False
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标准答案
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思路分析
Here is the evaluation of each choice based on the statement given and how COUNT and COUNT(*) actually behave. Option 1: 'True' — This would claim that COUNT(*) tallies only those rows that contain a value, and that COUNT tallies all rows. In reality, COUNT(*) counts every row in the resul......Login to view full explanation

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