CREATE TABLE "mailbox"."mail_nlp" (
   "mail_id" varchar(40),
   "mail_category" varchar(255),
   "mail_first_category" varchar(255),
   "mail_second_category" varchar(255),
   "mail_three_category" varchar(255),
   "second_dept_id" int,
   "second_dept_name" varchar(255),
   "three_dept_id" int,
   "three_dept_name" varchar(255),
   PRIMARY KEY ("mail_id")
);