前端学习笔记202308学习笔记第八十四天-创建学校表和学生表

----创建学校表
CREATE table t_geyao_school (
  school_name VARCHAR(45) not null,
  id SERIAL NOT NULL PRIMARY KEY
)

---创建班级表 是指主外键关系---
CREATE table t_geyao_class (
  school_id INTEGER REFERENCES t_geyao_school (id),
  class_name VARCHAR(45) not null,
  id SERIAL NOT NULL PRIMARY KEY
)