基本环境
操作系统： centOS 7
postGreSQL ： 10
timescaleDB : 1.0 +
postGreSQL安装
Centos7 安装Postgresql10.5和PostGIS
timescaleDB 安装
PostgreSQL 时序数据库插件 timescaleDB 部署实践 - PostGIS + timescaleDB => PG时空数据库 -- 德哥
官网安装文档：
timescaleDB 设置
TimescaleDB Docs - Setting up TimescaleDB
实验
-
-- 下载测试数据 -
wget https://timescaledata.blob.core.windows.net/datasets/weather_small.tar.gz -
wget https://timescaledata.blob.core.windows.net/datasets/weather_big.tar.gz -
-- 创建数据库 -
create database weather; -
-- 解压下载文件 -
tar -zxvf weather_small.tar.gz -
-- 创建表结构 -
psql -U postgres -d weather < weather.sql -
-- 导入数据 -
psql -U postgres -d weather -c "\COPY conditions FROM weather_small_conditions.csv CSV" -
psql -U postgres -d weather -c "\COPY locations FROM weather_small_locations.csv CSV" -
-- 查询测试 -
SELECT * FROM conditions c ORDER BY time DESC LIMIT 10; -
SELECT time, c.device_id, location, -
trunc(temperature, 2) temperature, trunc(humidity, 2) humidity -
FROM conditions c -
INNER JOIN locations l ON c.device_id = l.device_id -
WHERE l.environment = 'outside' -
ORDER BY time DESC LIMIT 10; -
SELECT date_trunc('hour', time) "hour", -
trunc(avg(temperature), 2) avg_temp, -
trunc(min(temperature), 2) min_temp, -
trunc(max(temperature), 2) max_temp -
FROM conditions c -
WHERE c.device_id IN ( -
SELECT device_id FROM locations -
WHERE location LIKE 'field-%' -
) GROUP BY "hour" ORDER BY "hour" ASC LIMIT 24;
注释
-
-- 数据库启动 -
systemctl start postgresql-10 -
-- 连接数据库 -
psql -
-- 创建数据库 -
CREATE database weather_big; -
-- 创建时序关系 -
CREATE EXTENSION IF NOT EXISTS timescaledb CASCADE; -
-- 导入数据 -
psql -U postgres -d weather_big < weather.sql -
psql -U postgres -d weather_big -c "\COPY conditions FROM weather_big_conditions.csv CSV" -
psql -U postgres -d weather_big -c "\COPY locations FROM weather_big_locations.csv CSV"
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