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diff --git a/doc/src/sgml/html/tutorial-createdb.html b/doc/src/sgml/html/tutorial-createdb.html new file mode 100644 index 0000000..c06ac54 --- /dev/null +++ b/doc/src/sgml/html/tutorial-createdb.html @@ -0,0 +1,119 @@ +<?xml version="1.0" encoding="UTF-8" standalone="no"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"><html xmlns="http://www.w3.org/1999/xhtml"><head><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><title>1.3. Creating a Database</title><link rel="stylesheet" type="text/css" href="stylesheet.css" /><link rev="made" href="pgsql-docs@lists.postgresql.org" /><meta name="generator" content="DocBook XSL Stylesheets V1.79.1" /><link rel="prev" href="tutorial-arch.html" title="1.2. Architectural Fundamentals" /><link rel="next" href="tutorial-accessdb.html" title="1.4. Accessing a Database" /></head><body id="docContent" class="container-fluid col-10"><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navheader"><table width="100%" summary="Navigation header"><tr><th colspan="5" align="center">1.3. Creating a Database</th></tr><tr><td width="10%" align="left"><a accesskey="p" href="tutorial-arch.html" title="1.2. Architectural Fundamentals">Prev</a> </td><td width="10%" align="left"><a accesskey="u" href="tutorial-start.html" title="Chapter 1. Getting Started">Up</a></td><th width="60%" align="center">Chapter 1. Getting Started</th><td width="10%" align="right"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="10%" align="right"> <a accesskey="n" href="tutorial-accessdb.html" title="1.4. Accessing a Database">Next</a></td></tr></table><hr></hr></div><div class="sect1" id="TUTORIAL-CREATEDB"><div class="titlepage"><div><div><h2 class="title" style="clear: both">1.3. Creating a Database</h2></div></div></div><a id="id-1.4.3.4.2" class="indexterm"></a><a id="id-1.4.3.4.3" class="indexterm"></a><p> + The first test to see whether you can access the database server + is to try to create a database. A running + <span class="productname">PostgreSQL</span> server can manage many + databases. Typically, a separate database is used for each + project or for each user. + </p><p> + Possibly, your site administrator has already created a database + for your use. In that case you can omit this step and skip ahead + to the next section. + </p><p> + To create a new database, in this example named + <code class="literal">mydb</code>, you use the following command: +</p><pre class="screen"> +<code class="prompt">$</code> <strong class="userinput"><code>createdb mydb</code></strong> +</pre><p> + If this produces no response then this step was successful and you can skip over the + remainder of this section. + </p><p> + If you see a message similar to: +</p><pre class="screen"> +createdb: command not found +</pre><p> + then <span class="productname">PostgreSQL</span> was not installed properly. Either it was not + installed at all or your shell's search path was not set to include it. + Try calling the command with an absolute path instead: +</p><pre class="screen"> +<code class="prompt">$</code> <strong class="userinput"><code>/usr/local/pgsql/bin/createdb mydb</code></strong> +</pre><p> + The path at your site might be different. Contact your site + administrator or check the installation instructions to + correct the situation. + </p><p> + Another response could be this: +</p><pre class="screen"> +createdb: could not connect to database postgres: could not connect to server: No such file or directory + Is the server running locally and accepting + connections on Unix domain socket "/tmp/.s.PGSQL.5432"? +</pre><p> + This means that the server was not started, or it was not started + where <code class="command">createdb</code> expected it. Again, check the + installation instructions or consult the administrator. + </p><p> + Another response could be this: +</p><pre class="screen"> +createdb: could not connect to database postgres: FATAL: role "joe" does not exist +</pre><p> + where your own login name is mentioned. This will happen if the + administrator has not created a <span class="productname">PostgreSQL</span> user account + for you. (<span class="productname">PostgreSQL</span> user accounts are distinct from + operating system user accounts.) If you are the administrator, see + <a class="xref" href="user-manag.html" title="Chapter 21. Database Roles">Chapter 21</a> for help creating accounts. You will need to + become the operating system user under which <span class="productname">PostgreSQL</span> + was installed (usually <code class="literal">postgres</code>) to create the first user + account. It could also be that you were assigned a + <span class="productname">PostgreSQL</span> user name that is different from your + operating system user name; in that case you need to use the <code class="option">-U</code> + switch or set the <code class="envar">PGUSER</code> environment variable to specify your + <span class="productname">PostgreSQL</span> user name. + </p><p> + If you have a user account but it does not have the privileges required to + create a database, you will see the following: +</p><pre class="screen"> +createdb: database creation failed: ERROR: permission denied to create database +</pre><p> + Not every user has authorization to create new databases. If + <span class="productname">PostgreSQL</span> refuses to create databases + for you then the site administrator needs to grant you permission + to create databases. Consult your site administrator if this + occurs. If you installed <span class="productname">PostgreSQL</span> + yourself then you should log in for the purposes of this tutorial + under the user account that you started the server as. + + <a href="#ftn.id-1.4.3.4.10.4" class="footnote"><sup class="footnote" id="id-1.4.3.4.10.4">[1]</sup></a> + </p><p> + You can also create databases with other names. + <span class="productname">PostgreSQL</span> allows you to create any + number of databases at a given site. Database names must have an + alphabetic first character and are limited to 63 bytes in + length. A convenient choice is to create a database with the same + name as your current user name. Many tools assume that database + name as the default, so it can save you some typing. To create + that database, simply type: +</p><pre class="screen"> +<code class="prompt">$</code> <strong class="userinput"><code>createdb</code></strong> +</pre><p> + </p><p> + If you do not want to use your database anymore you can remove it. + For example, if you are the owner (creator) of the database + <code class="literal">mydb</code>, you can destroy it using the following + command: +</p><pre class="screen"> +<code class="prompt">$</code> <strong class="userinput"><code>dropdb mydb</code></strong> +</pre><p> + (For this command, the database name does not default to the user + account name. You always need to specify it.) This action + physically removes all files associated with the database and + cannot be undone, so this should only be done with a great deal of + forethought. + </p><p> + More about <code class="command">createdb</code> and <code class="command">dropdb</code> can + be found in <a class="xref" href="app-createdb.html" title="createdb"><span class="refentrytitle"><span class="application">createdb</span></span></a> and <a class="xref" href="app-dropdb.html" title="dropdb"><span class="refentrytitle"><span class="application">dropdb</span></span></a> + respectively. + </p><div class="footnotes"><br /><hr style="width:100; text-align:left;margin-left: 0" /><div id="ftn.id-1.4.3.4.10.4" class="footnote"><p><a href="#id-1.4.3.4.10.4" class="para"><sup class="para">[1] </sup></a> + As an explanation for why this works: + <span class="productname">PostgreSQL</span> user names are separate + from operating system user accounts. When you connect to a + database, you can choose what + <span class="productname">PostgreSQL</span> user name to connect as; + if you don't, it will default to the same name as your current + operating system account. As it happens, there will always be a + <span class="productname">PostgreSQL</span> user account that has the + same name as the operating system user that started the server, + and it also happens that that user always has permission to + create databases. Instead of logging in as that user you can + also specify the <code class="option">-U</code> option everywhere to select + a <span class="productname">PostgreSQL</span> user name to connect as. + </p></div></div></div><div xmlns="http://www.w3.org/TR/xhtml1/transitional" class="navfooter"><hr></hr><table width="100%" summary="Navigation footer"><tr><td width="40%" align="left"><a accesskey="p" href="tutorial-arch.html" title="1.2. Architectural Fundamentals">Prev</a> </td><td width="20%" align="center"><a accesskey="u" href="tutorial-start.html" title="Chapter 1. Getting Started">Up</a></td><td width="40%" align="right"> <a accesskey="n" href="tutorial-accessdb.html" title="1.4. Accessing a Database">Next</a></td></tr><tr><td width="40%" align="left" valign="top">1.2. Architectural Fundamentals </td><td width="20%" align="center"><a accesskey="h" href="index.html" title="PostgreSQL 13.4 Documentation">Home</a></td><td width="40%" align="right" valign="top"> 1.4. Accessing a Database</td></tr></table></div></body></html>
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