[root@iZ2ze30dygwd6yh7gu6lskZ ~]# taos
Welcome to the TDengine Command Line Interface, Client Version:3.0.0.1
failed to connect to server, reason: Unable to establish connection
时序数据库
时序数据库(Time Series Database,TSDB)全称为时间序列数据库。时间序列数据库指主要用于处理带时间标签(按照时间的顺序变化,即时间序列化)的数据,带时间标签的数据也称为时间序列数据
1、时序数据的主要数据属性
(1)每个数据点都包含用于索引、聚合和采样的时间戳。该数据也可以是多维的和相关的;
(2)写多读少,需要支持秒级和毫秒级甚至纳秒级高频写入;查询通常是多维聚合查询,对查询的延迟要求比较高
(3)数据的汇总视图(例如,下采样或聚合视图、趋势线)可能比单个数据.
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ESP32-C3入门教程 ESP-IDF 5.x篇①——ESP-IDF V5.0.1编译报错:Failed to resolve component ‘jsmn‘.DFBB&东方不败: idf.py add-dependency "espressif/jsmn^1.1.0"
Executing action: add-dependency
Traceback (most recent call last):
File "d:\ESP-IDF\v5.3.1\esp-idf\tools\idf.py", line 844, in <module>
main()
File "d:\ESP-IDF\v5.3.1\esp-idf\tools\idf.py", line 734, in main
cli(argv, prog_name=PROG, complete_var=SHELL_COMPLETE_VAR)
File "d:\Espressif\python_env\idf5.3_py3.11_env\Lib\site-packages\click\core.py", line 1157, in __call__
return self.main(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^
File "d:\Espressif\python_env\idf5.3_py3.11_env\Lib\site-packages\click\core.py", line 1078, in main
rv = self.invoke(ctx)
^^^^^^^^^^^^^^^^
File "d:\Espressif\python_env\idf5.3_py3.11_env\Lib\site-packages\click\core.py", line 1720, in invoke
return _process_result(rv)
^^^^^^^^^^^^^^^^^^^
File "d:\Espressif\python_env\idf5.3_py3.11_env\Lib\site-packages\click\core.py", line 1657, in _process_result
value = ctx.invoke(self._result_callback, value, **ESP32-C3入门教程 网络篇⑤——基于esp_http_client实现HTTP的POST/GET/PUT/DELETE请求服务器的第一种方法小康师兄: 是的,你得有springboot基础,找一个springboot脚手架然后把代码复制到controller里面去就行了ESP32-C3入门教程 网络篇⑤——基于esp_http_client实现HTTP的POST/GET/PUT/DELETE请求服务器的第一种方法ZZL81566: 哥,服务器码源 这个是JAVA的吗?如何跑??