英文:
How to know the number of time series counts in Apache IoTDB?
问题
我仍然对IoTDB不太熟悉，目前正在从旧数据库向其中插入数据。但是我不确定现在有多少时间序列。想知道如何查询Apache IoTDB数据库中时间序列总数？
英文:
I am still new to IoTDB and am currently inserting my data into it from the old database. However I am not sure how many time series are there now. Want to know how to query the total number of time series amount under the database of Apache IoTDB?
答案1
得分: 0
你可以选择一个非空的时间序列列（例如称之为c1）。然后尝试在Apache IoTDB中执行select count(c1) from root.db.** group by level=1。看看这是否会给你时间序列的数量。
英文:
You can select a column of time series that is not empty (for example, call that c1). Then, try to execute select count(c1) from root.db.** group by level=1 in Apache IoTDB. See if this gives you the time series amount.
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