1 已有表tb_stu的部分数据如下图所示把奖学金前三名的金额减300元下列选项实现该功能的是A update tb_stu set scholarship=scholarship-300 order by scholarship desc LIMIT 3;B update tb_stu set scholarship=scholarship-300 order by scholarship L
D update tb_stu set scholarship=scholarship-300 order by scholarship desc LIMIT 0,3;
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