insert into tb_selection_joiner(
selection_id,
clazz_id
)values(
#{selectionId},
#{clazzId}
)
delete from tb_selection_joiner where id = #{id}
update tb_selection_joiner set
selection_id=#{selectionId},
clazz_id=#{clazzId}
where id = #{id}
update tb_selection_joiner set
selection_id = #{selectionId},
clazz_id = #{clazzId}
where id = #{id}
and id = #{id}and selection_id = #{selectionId}and clazz_id = #{clazzId}
delete from tb_selection_joiner where selection_id = #{selectionId}