声明psql 将执行一条查询字串, command,然后退出。这一点在 shell 脚本里很有用。 command必须是一条完全可以被服务器分析的查询字串(也就是说,它不包含 psql特有的特性), 或者是一个反斜杠命令。这样你就不会混合 SQL 和 psql 元命令。要想混合使用,你可以把字串定向到psql里,象这样: echo "select * fro...
\s [FILE] display history or save it tofile\wFILEwritequery buffer tofileInput/Output \copy ... perform SQL COPY with data stream to the client host \echo[-n] [STRING]writestringto standard output (-nforno newline) \i FILE execute commands fromfile\ir FILE as \i, but relative to ...
要求psql 在与一个数据库联接前提示输入口令。 这个选项将在整个会话过程中有效,即使你用元命令\connect改变了所联接的数据库。 在当前版本里,如果服务器要求口令认证,psql 自动提出一个口令提示符。因为目前这个特性是以一个“hack”为基础, 自动识别有可能奇怪地失效,因此用这个选项强制一个提示符。 如果没有声明...
\copy ... perform SQL COPY with data stream to the client host \echo [-n] [STRING] write string to standard output (-n for no newline) \i FILE execute commands from file \ir FILE as \i, but relative to location of current script \o [FILE] send all query results to file or |...
Method 1: Connection With the Database Using Command Prompt We can use the command Prompt to connect to the database. Open thecmd. To make sure your psql is installed you can run “psql --version”. Running this will ensure the psql installation by retrieving the version of your psql. ...
Press Tab at the start of a line to display a list of available SQL commands. The psql tool also has built-in commands that can help you manage your databases and tables. CommandDescription \l List all databases. \c Connect to a database. \d List tables, sequences, and views in the...
connect to new database (currently "aoldbs") \encoding [ENCODING] show or set client encoding \password [USERNAME] securely change the password for a user \conninfo display information about current connection Operating System \cd [DIR] change the current working directory ...
psql is a command-line interface used to perform various database tasks efficiently. For instance, using psql different commands can be executed to access, cre…
CONNECTINGTOADATABASE與一個數據庫聯接psql是一個普通的 PostgreSQL 客戶端應用。為了與一個數據庫聯接,你需要知道你的目標資料庫, 伺服器的主機名 和埠號以及你希望以哪個使用者的身份進行聯接等資訊。 我們可以透過命令列引數告訴 psql 這些資訊,分別是 -d, -h,-p,和 -U。 如果有個引數不屬於任何選項開關...
This is a two-part article for beginners who have installed the most advanced open source database, PostgreSQL, and are now looking to connect to it. Since terminal/command line and pgAdmin are the most favored ways for connecting to PostgreSQL, I explai