您的查询在语法上正确无误，但未返回任何结果

Question

您的查询在语法上是正确的，但未返回任何结果

SELECT mean("tup_inserted") AS "mean_tup_inserted" 
FROM "telegraf"."autogen"."postgresql" 
WHERE time > '2018-10-04T13:08:00.000Z' 
AND time < '2018-10-04T13:08:00.000Z' 
AND "db"='db_sige_mes_2018'
GROUP BY time(:interval:) FILL(null)