There are two tables: students, and scores, in the mysql database （4.0＋) exactly like t

There are two tables: students, and scores, in the mysql database (4.0+) exactly like this:

SN | Name SN | Score

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1 | Jerry 1 | 48

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2 | Lily 2 | 50

------------- -------------

3 | Roy

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where the SN is the foreigh key. Write an SQL statement to delete all the names that have no score.

请帮忙给出正确答案和分析，谢谢！