Course课程
Table
CREATE TABLE course
(
id SERIAL PRIMARY KEY,
cover BYTEA,
title VARCHAR(32) NOT NULL,
subtitle VARCHAR(32),
summary VARCHAR(255),
teacher UUID NOT NULL,
tag VARCHAR(255),
lang VARCHAR (8),
speech_lang VARCHAR (8),
status INTEGER,
lesson_num INTEGER,
creator UUID NOT NULL,
create_time INTEGER,
update_time INTEGER,
delete_time INTEGER ,
content TEXT
)
CREATE TABLE 'lesson'
(
id SERIAL PRIMARY KEY,
course_id INTEGER,
title VARCHAR(32) NOT NULL,
subtitle VARCHAR(32),
creator CHAR (36),
tag VARCHAR(255),
summary VARCHAR(255),
status INTEGER,
cover BYTEA,
teacher UUID NOT NULL,
lang VARCHAR (8),
speech_lang VARCHAR (8),
create_time INTEGER,
modify_time INTEGER,
receive_time INTEGER ,
'date' INTEGER,
'duration' INTEGER,
'content' TEXT
)