Abs(语文-数学)/mean(语文,数学) 是一个SPSS的()
A、算术表达式
B、条件表达式
C、变量
D、函数
A、算术表达式
B、条件表达式
C、变量
D、函数
A、select*from student where type=”数学”and type=”语文” B、select*from student where type=”数学”or type=”语文” C、select*from student where type in(”数学”,”语文”) D、select*from student where type in(”数学”、”语文”)
A、select*from student where type=“数学” and type=“语文” B、select*from student where type=“数学” or type=“语文” C、select*from student where type in(“数学”,“语文”) D、select*from student where type in(“数学”、“语文”)
A、SELECT *FROM 学生成绩WHERE 课程="语文"AND 课程="数学"ORDER BY 成绩 B、SELECT *FROM 学生成绩WHERE 课程="语文"OR 课程="数学"ORDER BY 成绩DESC C、SELECT *FROM 学生成绩WHERE 课程="语文",课程="数学"ORDER BY 成绩DESC D、SELECT *FROM 学生成绩WHERE 课程="语文"OR 课程="数学"ORDER BY 成绩ASC