题目内容

假设有成绩表s，表结构为s(sname,cname,grade)，其中sname表示学生姓名，varchar(20) ;cname表示课程名称，varchar(30);grade表示成绩，decimal(15,2);若要把“张三的化学成绩90分”插入到表中，正确的是（）

A. insert into s value('张三','化学','90')
B. insert into s values('张三','化学',90)
C. insert into s values('张三','化学','90')
D. add into s values('张三','化学',90)

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