试题详情
- 单项选择题 A SELECT statement can be used to perform these three functions: 1. Choose rows from a table. 2. Choose columns from a table 3. Bring together data that is stored in different tables by creating a link between them. Which set of keywords describes these capabilities? （）
A、difference, projection, join
B、selection, projection, join
C、selection, intersection, join
D、intersection, projection, join
E、difference, projection, product
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