数据库第七次作业

更新教师表中所有记录，将津贴改为2000

输入：update teacher set comm = "2000";

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更新教师表中教师号在T5到T8之间的记录，将津贴改为1500

输入：update teacher set comm = "1500" where no between "T5" and "T8";

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更新授课表中周数为8的记录，将教师号改为T7，课程号改为C1

输入：update school_teaching set teacher_no = "T7",course_no = "C1" where week = 8;

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更新课程表中课时数不在45，50中的记录，将课时数改为25

输入：update course set class_hours = 25 where class_hours not in("45","50");

 

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更新教师表中工资不等于3000并且津贴不为空的记录，将津贴改为1000

输入：update teacher set comm = "1000" where sal !=3000 and comm is not null;

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更新授课表中教室号在J102，Y104，Y303，J301中的记录，将周数改为14，课程号改为C5

输入：update school_teaching set week = "14",course_no = "c5" where class_num in("y202","y302","y303","j102");

 

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更新教师表中工资等于3000并且岗位津贴大于等于1000的记录，将津贴改为500

输入：update teacher set comm = "500" where sal = 3000 and comm >= 1000;

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更新课程表中带课程名称以字母“M”开头并且课程名称中有“L”字母的记录，将课时数改为78

输入： update course set class_hours = 78 where name like "m%l%";

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更新授课表中教室在Y栋2楼的记录，将课程号改为C8，教师号改为T10

输入：update school_teaching set course_no = "c8",teacher_no = "t10" where class_num like "y2%";

 

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