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
- B
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