摘要：
CREATE TABLE job_grades(grade_level VARCHAR(3),lowest_sal INT,highest_sal INT); INSERT INTO job_grades VALUE ('A', 1000, 2999);INSERT INTO job_grades 阅读全文
摘要：
DROP DATABASE IF EXISTS student;CREATE DATABASE student;USE student; CREATE TABLE student( studentno VARCHAR(10) NOT NULL PRIMARY KEY, studentname VAR 阅读全文