给出数据表score(stu_id,name,math,english,chinese),下列语句正确的是( )
select *,sum(english) from score
select stu_id,sum(math) from score
delete * from score
select sum(math),avg(chinese) from score
这题答案错了,应该是 D ,A中select查询了所有,后面就不应该再跟其他了,B少了GROUP BY, C的delete后面不带 。
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