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[单选题]
公司使用sql server 2016数据库,现在需要创建表student ,其中包含列“编号,姓名,身份证号,班
A.将“成绩”列设置索引,表达式为“成绩>=0 and 成绩<=100”
B.将“成绩”列设置标识列,表达式为“成绩>=0 and 成绩<=100”
C.将“成绩”列设置主键,表达式为“成绩>=0 and 成绩<=100”
D.将“成绩”列设置check约束,表达式为“成绩>=0 and 成绩<=100”
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A.将“成绩”列设置索引,表达式为“成绩>=0 and 成绩<=100”
B.将“成绩”列设置标识列,表达式为“成绩>=0 and 成绩<=100”
C.将“成绩”列设置主键,表达式为“成绩>=0 and 成绩<=100”
D.将“成绩”列设置check约束,表达式为“成绩>=0 and 成绩<=100”
A.DECLARE@MyvarINT
B.SELECT*FROM[AAA]
C.CREATE DATABASE AAA
D.DELETE* FROM AAA