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                #### **介紹** PostgreSQL是一個功能強大的開源對象關系數據庫系統,經過30多年的積極開發,在可靠性,功能健壯性和性能方面贏得了良好的聲譽。 #### **命令行** - 命令行文檔 <https://devdocs.io/postgresql~14/app-psql> - 快速連接 ```bash psql -h localhost -p 5432 -U postgres -d dbName ``` ```bash psql -h localhost -p 5432 -U postgres -d dbName --no-password ``` - 幫助文檔 `\help` - 查看所有數據庫 `\l` - 切換數據庫 `\c db_name` - 查看所有表和序列 `\d` - 查看所有表 `\dt` - 查看表結構 `\d table_name` or `\d+ table_name` - 展開表格 `\x` - 退出psql `\q` #### **速查清單** ```sql SELECT to_char(now(),'yyyy-MM-dd HH24:MI:ss'); -- 格式化當前時間(2022-07-15 13:17:36) ```
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