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2024/03/27

Ubuntu 22.04 LTS 安裝PostgreSQL

sudo sh -c 'echo "deb https://apt.postgresql.org/pub/repos/apt $(lsb_release -cs)-pgdg main" > /etc/apt/sources.list.d/pgdg.list'
wget --quiet -O - https://www.postgresql.org/media/keys/ACCC4CF8.asc | sudo apt-key add -
sudo apt-get update
sudo apt-get -y install postgresql

# 安裝後先啟用PostgreSQL服務

sudo systemctl restart postgresql

PostgreSQL 取得當月到月尾的資料

--算法等於當前月份 to 當前月份 + 1個月-1天
SELECT * FROM test WHERE dt BETWEEN (SELECT (date_trunc('MONTH', now())::DATE)) AND (SELECT (date_trunc('MONTH', now()::DATE) + interval '1 month' - interval '1 day')::DATE);

參考資料：
https://www.postgresql.org/docs/11/functions-datetime.html
https://www.postgresql.org/docs/11/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC