mysql查询语句练习题

以下是一些MySQL查询语句练习题的例子：

1. 查询学生表中所有学生的姓名和年龄：
SELECT sname, sage FROM student;

2. 查询课程表中所有课程的名称和对应的教师姓名：
SELECT cname, tname FROM course
JOIN teacher ON course.tid = teacher.tid;

3. 查询成绩表中所有学生的姓名、课程名称和对应的成绩：
SELECT s.sname, c.cname, sc.score FROM student s
JOIN sc ON s.sid = sc.sid
JOIN course c ON sc.cid = c.cid;

4. 查询成绩表中成绩在80分以上的学生的姓名和课程名称：
SELECT s.sname, c.cname FROM student s
JOIN sc ON s.sid = sc.sid
JOIN course c ON sc.cid = c.cid
WHERE sc.score > 80;

5. 查询教师表中教师姓名以"李"开头的教师的编号和姓名：
SELECT tid, tname FROM teacher
WHERE tname LIKE '李%';

这些例子可以帮助你练习使用MySQL查询语句来检索和过滤数据库中的数据。你可以根据需要修改查询条件和字段选择来进一步练习。<span class="em">1</span><span class="em">2</span><span class="em">3</span>
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