【单选题】在成绩中要查找成绩≥80且成绩≤90的学生,正确的条件表达式是()。 A. 在查询准则中比较运算符"Between … And"用于设定范围,表示“在…之间”,此题在成绩中要查找成绩≥80且成绩≤90的学生,表达式应为"成绩Between 80 And 90",所以选项A)正确。 B. 成绩 Between 80 And 90 C. 成绩 Between 80 To 90 D. 成绩 Between 79 And 91

在成绩表中查询成绩大于等于80且小于等于90的学生。正确的条件表达式是（ ） A: between 80 and 90 B: between 80 to 90 C: between 79 and 91 D: between 79 to 91

若有“选课”表，其关系模式为：选课(学号,课程号,成绩)，下列哪个语句可以实现查询所有成绩小于80或大于90的记录的功能？ A: SELECT * FROM 选课 WHERE 成绩< 80 OR 成绩>90 B: SELECT * FROM 选课 WHERE 成绩 NOT BETWEEN 80 AND 90 C: SELECT * FROM 选课 WHERE NOT(成绩>= 80 AND 成绩<=90) D: SELECT * FROM 选课 WHERE 成绩>= 80 AND 成绩<=90

在成绩中要查找成绩≥80且成绩490的学生，正确的条件表达式是______ A: 成绩Between 80 And 90 B: 成绩Between 80 To 90 C: 成绩Between 79 And 91 D: 成绩Between 79 To 91

要查找成绩≥80且≤90的学生,“成绩”列的条件行应设置为( )。[br][/br](单选题) A: Between 80 To 90 B: Between 80 And 90 C: Between 79 To 91 D: Between 79 And 91