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用户从 MySQL 迁移到 PostgreSQL 后，需要快速了解数据库结构，但发现熟悉的 'show tables' 命令在 PostgreSQL 中无效。现有流程中，用户必须学习新的 psql 元命令（如 \dt）或查询系统表（如 pg_catalog.pg_tables），这增加了学习成本和操作步骤。对于不熟悉 PostgreSQL 命令行的开发者，这种语法差异导致频繁查阅文档或搜索，中断工作流，造成时间浪费和挫败感。
What's the equivalent to show tables (from MySQL) in PostgreSQL?
From the psql command line interface, First, choose your database \c database_name Then, this shows all tables in the current schema: \dt Programmatically (or from the psql interface too, of course): SELECT * FROM pg_catalog.pg_tables; The system tables live in the pg_catalog database.
You can use PostgreSQL's interactive terminal Psql to show tables in PostgreSQL. 1. Start Psql Usually you can run the following command to enter into psql: psql DBNAME USERNAME For example, psql template1 postgres One situation you might have is: suppose you login as root, and you don't remember the database name. You can just enter first into Psql by running: sudo -u postgres psql In some systems, sudo command is not available, you can instead run either command below: psql -U postgres psql --username=postgres 2. Show tables Now in Psql you could run commands such as: \? list all the commands \l list databases \conninfo display information about current connection \c [DBNAME] connect to new database, e.g., \c template1 \dt list tables of the public schema \dt .* list tables of certain schema, e.g., \dt public.* \dt *.* list tables of all schemas Then you can run SQL statements, e.g., SELECT * FROM my_table; (Note: a statement must be terminated with semicolon ; ) \q quit psql
Login as superuser: sudo -u postgres psql You can list all databases and users by \l command, (list other commands by \? ). Now if you want to see other databases you can change user/database by \c command like \c template1 , \c postgres postgres and use \d , \dt or \dS to see tables/views/etc.
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"body": "<p>From the <code>psql</code> command line interface,</p>\n\n<p>First, choose your database</p>\n\n<pre><code>\\c database_name\n</code></pre>\n\n<p>Then, this shows all tables in the current schema:</p>\n\n<pre><code>\\dt\n</code></pre>\n\n<hr>\n\n<p>Programmatically (or from the <code>psql</code> interface too, of course):</p>\n\n<pre><code>SELECT * FROM pg_catalog.pg_tables;\n</code></pre>\n\n<p>The system tables live in the <code>pg_catalog</code> database.</p>\n",
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"body": "<p>You can use PostgreSQL's interactive terminal Psql to show tables in PostgreSQL.</p>\n<p><strong>1. Start Psql</strong></p>\n<p>Usually you can run the following command to enter into psql:</p>\n<pre><code>psql DBNAME USERNAME\n</code></pre>\n<p>For example, <code>psql template1 postgres</code></p>\n<p>One situation you might have is: suppose you login as root, and you don't remember the database name. You can just enter first into Psql by running:</p>\n<pre><code>sudo -u postgres psql\n</code></pre>\n<p>In some systems, sudo command is not available, you can instead run either command below:</p>\n<pre><code>psql -U postgres\npsql --username=postgres\n</code></pre>\n<p><strong>2. Show tables</strong></p>\n<p>Now in Psql you could run commands such as:</p>\n<ol>\n<li><code>\\?</code> list all the commands</li>\n<li><code>\\l</code> list databases</li>\n<li><code>\\conninfo</code> display information about current connection</li>\n<li><code>\\c [DBNAME]</code> connect to new database, e.g., <code>\\c template1</code></li>\n<li><code>\\dt</code> list tables of the public schema</li>\n<li><code>\\dt <schema-name>.*</code> list tables of certain schema, e.g., <code>\\dt public.*</code></li>\n<li><code>\\dt *.*</code> list tables of all schemas</li>\n<li>Then you can run SQL statements, e.g., <code>SELECT * FROM my_table;</code>(Note: a statement must be terminated with semicolon <code>;</code>)</li>\n<li><code>\\q</code> quit psql</li>\n</ol>\n",
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"body": "<p>Login as superuser:</p>\n\n<pre><code>sudo -u postgres psql\n</code></pre>\n\n<p>You can list all databases and users by <code>\\l</code> command, (list other commands by <code>\\?</code>).</p>\n\n<p>Now if you want to see other databases you can change user/database by <code>\\c</code> command like <code>\\c template1</code>, <code>\\c postgres postgres</code> and use <code>\\d</code>, <code>\\dt</code> or <code>\\dS</code> to see tables/views/etc.</p>\n",
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