SELECT * FROM music_group_purchase_list WHERE id_ = #{id} SELECT * FROM music_group_purchase_list ORDER BY id_ INSERT INTO music_group_purchase_list (id_,music_group_id_,goods_id_,purchase_num_,create_time_,update_time_) VALUES(#{id},#{musicGroupId},#{goodsId},#{purchaseNum},now(),now()) UPDATE music_group_purchase_list purchase_num_ = #{purchaseNum}, update_time_ = NOW(), music_group_id_ = #{musicGroupId}, goods_id_ = #{goodsId}, WHERE id_ = #{id} DELETE FROM music_group_purchase_list WHERE id_ = #{id} SELECT * FROM music_group_purchase_list music_group_id_ = #{musicGroupId} ORDER BY id_ SELECT COUNT(*) FROM music_group_purchase_list music_group_id_ = #{musicGroupId} INSERT INTO music_group_purchase_list (id_,music_group_id_,goods_id_,purchase_num_,create_time_,update_time_) VALUES (#{item.id},#{item.musicGroupId},#{item.goodsId},#{item.purchaseNum},now(),now())