13 lines
283 B
SQL
13 lines
283 B
SQL
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-- Your SQL goes here
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alter table kecheng_teacher
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add duration integer;
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comment on column kecheng_teacher.duration is '课程时长（分钟）';
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alter table kecheng_student
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add duration integer;
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comment on column kecheng_student.duration is '课程时长（分钟）';
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