23 lines
747 B
SQL
23 lines
747 B
SQL
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-- Your SQL goes here
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create table kecheng_repeat
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(
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id varchar not null
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primary key
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unique,
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kecheng_root_id varchar not null,
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kecheng_id varchar not null,
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kecheng_type varchar,
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start_from timestamp,
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end_by timestamp,
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repeat_start timestamp
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);
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comment on column kecheng_repeat.kecheng_type is 'STUDENT或者TEACHER';
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comment on column kecheng_repeat.start_from is '课程当天开始时间';
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comment on column kecheng_repeat.end_by is '课程的当天结束时间';
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comment on column kecheng_repeat.repeat_start is '不需要`repeat_end`了，因为同一组`kecheng_root_id`的数据按照`repeat_start`时间排列，后一个就是前一个的end时间。';
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