select id, form_id, task_id from sys_task_form
insert into sys_task_form
form_id,task_id,#{formId},#{taskId},
update sys_task_form
form_id = #{formId},task_id = #{taskId},
where id = #{id}
delete from sys_task_form where id = #{id}
delete from sys_task_form where id in
#{id}