查询student表age值在16～20之间的name值（）
A. SELECT name FROM student WHERE age BETWEEN 16 AND 20
B. SELECT name FROM student WHERE age NOT BETWEEN 16 AND 20
C. SELECT name FROM student WHERE age IN(16,20)
D. SELECT name FROM student WHERE age NOT IN(16,20)
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查询student表中name字段值第二个字符为'u',最后一个字符为'g'的学生id（）
A. SELECT id FROM student WHERE name LIKE '%u%g'
B. SELECT id FROM student WHERE name LIKE '_u_g'
C. SELECT id FROM student WHERE name LIKE '_u%g'
D. SELECT id FROM student WHERE name LIKE '_u%g'%
查询student表中的所有记录，按照grade字段升序排列，按照gender字段降序排列（）
A. SELECT * FROM student ORDER BY grade,gender ASC
B. SELECT * FROM student ORDER BY grade DESC,gender DESC
C. SELECT * FROM student ORDER BY grade DESC,gender ASC
D. SELECT * FROM student ORDER BY grade ASC,gender DESC
查询student表中grade字段值从第5位到第8位的学生（从高到第）（）
A. SELECT * FROM student ORDER BY grade DESC LIMIT 5,8
B. SELECT * FROM student ORDER BY grade LIMIT 5,8
C. SELECT * FROM student ORDER BY grade LIMIT 4,4
D. SELECT * FROM student ORDER BY grade DESC LIMIT 4,4
公司中有多个部门和多个职员，每个职员只能属于一个部门，一个部门可以有多名职员，从职员到部门的联系类型是（）
A. 多对多
B. 多对一
C. 一对多
D. 一对一
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