Title: 实验三 Download
Description: --The basic content of this experiment is to master the definition, use and management methods of stored procedures, functions and triggers in Oracle database by writing stored procedures, functions and triggers. The basic steps of the experiment are as follows: --1. Create a trigger for the teacher table. The trigger name is "student initial + updateteacher", --When inserting a new teacher, if the salary of the new teacher is less than 4000, refuse to insert the data; when the salary is higher than 90000, change the salary to 9000; --When deleting a teacher, the basic information of the deleted teacher is output.
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