select id, file_id, user_id, create_time from iit_myself_file where id = #{id} insert into iit_myself_file file_id, user_id, create_time, #{fileId}, #{userId}, #{createTime}, update iit_myself_file file_id = #{fileId}, user_id = #{userId}, create_time = #{createTime}, where id = #{id} delete from iit_myself_file where id = #{id} delete from iit_myself_file where id in #{id} select count(*) from iit_myself_file where user_id = #{userId}