insert into voc_vals (id, x, y, val, create_time) values
(${id}, ${x}, ${y}, ${val}, ${createTime});
insert into voc_vals (id, x, y, val, create_time) values
(${item.id}, #{item.x},#{item.y},#{item.val},#{item.createTime})
delete from voc_vals
where create_time < date_sub(now(), interval 1 year);
delete from voc_vals
where date_format(create_time, '%Y%m%d%H') = ${time};