-- Your SQL goes here

create table kecheng_teacher
(
    id             varchar   not null,
    teacher_id     varchar   not null,
    kecheng_name   varchar   not null,
    kecheng_status varchar   not null,
    kecheng_desc   varchar,
    start_from     timestamp not null,
    end_by         timestamp not null
);

create unique index kecheng_teacher_id_uindex
    on kecheng_teacher (id);

alter table kecheng_teacher
    add constraint kecheng_teacher_pk
        primary key (id);