Grafana曲线图展示每秒新增数据量

添加MySQL数据源 -> 添加查询条件

sql 模式编写查询条件：

SELECT
  $__timeGroupAlias(create_time, $interval),
  count(order_no) as '创单数量'
FROM t_order
WHERE
  merchant_id = $merchant_id AND
  $__timeFilter(create_time)
GROUP BY 1
ORDER BY
  $__timeGroup(create_time, $interval);

SELECT
  $__timeGroupAlias(create_time, 1s),
  count(uuid) AS "num"
FROM t_user
WHERE
  $__timeFilter(create_time)
GROUP BY 1
ORDER BY $__timeGroup(create_time, 1s)