Question

我有这样的表/系列

Message              MessageValue 
 ---------------      ---------------------   
property1                         10            
property2                         9
property3                         7
property2                         22

我想每10分钟对property2的平均值进行下采样。我该怎么办呢？

创建连续的查询＆＃34; cq_10m＆＃34; ON＆＃34; DatabaseName＆＃34; BEGIN SELECT mean（SELECT MessageValue WHERE Message = property2）AS＆＃34; mean_Property2＆＃34; INTO＆＃34; RetentionPolicyName＆＃34;。＆＃34; downsampled_orders＆＃34; FROM＆＃34; TableName＆＃34; GROUP BY时间（10分钟）结束

Answer 1

如下所示。您的CQ将每10分钟查询一次数据库，并计算该时间范围内“ MessageValue”的平均值。这将被下采样到：mean_Property2。

CREATE CONTINUOUS QUERY "cq_10m" ON "dbName"
RESAMPLE EVERY 10m FOR 2h
BEGIN SELECT mean("MessageValue") AS mean_Property2 INTO 
mean_Property2 FROM "retentionPolicyName"."measurementName" WHERE "Message"='property2'
GROUP BY time(10m) END

如何在InfluxDB / InfluxQL中进行下采样时使用连续查询

1 个答案: