包含所有数据库文件等详细代码 创建客户信息表格kehu CREATE TABLE "YXMS".keku ( kehu_no VARCHAR2(6) NULL, kehu_name VARCHAR2(20) NULL, kehu_adress VARCHAR2(30) NULL, kehu_sh VARCHAR2(10) NULL, kehu_repute VARCHAR2(10) NULL, kehu_country VARCHAR2(10) NULL, kehu_province VARCHAR2(10) NULL, CONSTRAINT kehu_kehu_no_pk