题目
题目

HADM3740/HADM6740 SQL I Quiz

单项选择题

SELECT *  FROM Customers WHERE Country="Mexico"; Using the query above on the table below, how many columns are returned?

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思路分析
When evaluating a SELECT * query, the result set includes every column defined in the table, for the rows that satisfy the WHERE clause. First, identify the table structure: the screenshot shows......Login to view full explanation

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