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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML
><HEAD
><TITLE
>Managing a Database</TITLE
><META
NAME="GENERATOR"
CONTENT="Modular DocBook HTML Stylesheet version 1.19"><LINK
REL="HOME"
TITLE="PostgreSQL User's Guide"
HREF="user.html"><LINK
REL="PREVIOUS"
TITLE="Setting Up Your Environment"
HREF="environ.html"><LINK
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TITLE="Alternate Database Locations"
HREF="manage387.html"></HEAD
><BODY
BGCOLOR="#FFFFFF"
TEXT="#000000"
><DIV
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><TABLE
WIDTH="100%"
BORDER="0"
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CELLSPACING="0"
><TR
><TH
COLSPAN="3"
ALIGN="center"
>PostgreSQL User's Guide</TH
></TR
><TR
><TD
WIDTH="10%"
ALIGN="left"
VALIGN="bottom"
><A
HREF="environ.html"
>Prev</A
></TD
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>Next</A
></TD
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></TABLE
><HR
ALIGN="LEFT"
WIDTH="100%"></DIV
><H1
><A
NAME="MANAGE"
>Chapter 3. Managing a Database</A
></H1
><DIV
CLASS="TOC"
><DL
><DT
><B
>Table of Contents</B
></DT
><DT
><A
HREF="manage.html#AEN367"
>Database Creation</A
></DT
><DT
><A
HREF="manage387.html"
>Alternate Database Locations</A
></DT
><DT
><A
HREF="manage412.html"
>Accessing a Database</A
></DT
><DT
><A
HREF="manage453.html"
>Destroying a Database</A
></DT
></DL
></DIV
><P
><BLOCKQUOTE
CLASS="NOTE"
><P
><B
>Note: </B
>This section is currently a thinly disguised copy of the Tutorial. Needs to be augmented.
- thomas 1998-01-12</P
></BLOCKQUOTE
></P
><P
>Although the <I
CLASS="FIRSTTERM"
>site administrator</I
> is responsible for overall management of the
<SPAN
CLASS="PRODUCTNAME"
>Postgres</SPAN
> installation, some databases within the
installation may be managed by another person, designated the <I
CLASS="FIRSTTERM"
>database administrator</I
>.
This assignment of responsibilities occurs when a database is created. A user may be assigned
explicit privileges to create databases and/or to create new users. A user assigned both privileges
can perform most administrative task within <SPAN
CLASS="PRODUCTNAME"
>Postgres</SPAN
>, but will
not by default have the same operating system privileges as the site administrator.</P
><P
>The Database Administrator's Guide covers these topics in more detail.</P
><H1
CLASS="SECT1"
><A
NAME="AEN367"
>Database Creation</A
></H1
><P
>Databases are created by the <B
CLASS="COMMAND"
>create database</B
> issued from
within <SPAN
CLASS="PRODUCTNAME"
>Postgres</SPAN
>. <SPAN
CLASS="APPLICATION"
>createdb</SPAN
> is a command-line
utility provided to give the same functionality from outside <SPAN
CLASS="PRODUCTNAME"
>Postgres</SPAN
>.</P
><P
>The <SPAN
CLASS="PRODUCTNAME"
>Postgres</SPAN
> backend must be running for either method
to succeed, and the user issuing the command must be the <SPAN
CLASS="PRODUCTNAME"
>Postgres</SPAN
>
<I
CLASS="FIRSTTERM"
>superuser</I
> or have been assigned database creation privileges by the
superuser.</P
><P
>To create a new database named “mydb” from the command line, type
<PRE
CLASS="PROGRAMLISTING"
>% createdb mydb</PRE
>
and to do the same from within <SPAN
CLASS="APPLICATION"
>psql</SPAN
> type
<PRE
CLASS="PROGRAMLISTING"
>* CREATE DATABASE mydb;</PRE
></P
><P
>If you do not have the privileges required to create a database, you will see
the following:
<PRE
CLASS="PROGRAMLISTING"
>% createdb mydb
WARN:user "your username" is not allowed to create/destroy databases
createdb: database creation failed on mydb.</PRE
></P
><P
><SPAN
CLASS="PRODUCTNAME"
>Postgres</SPAN
> allows you to create any number of databases
at a given site and you automatically become the
database administrator of the database you just created.
Database names must have an alphabetic first
character and are limited to 32 characters in length.</P
><DIV
CLASS="NAVFOOTER"
><HR
ALIGN="LEFT"
WIDTH="100%"><TABLE
WIDTH="100%"
BORDER="0"
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><TD
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VALIGN="top"
><A
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>Prev</A
></TD
><TD
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><A
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>Home</A
></TD
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><A
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>Next</A
></TD
></TR
><TR
><TD
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>Setting Up Your Environment</TD
><TD
WIDTH="34%"
ALIGN="center"
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>;</TD
><TD
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ALIGN="right"
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>Alternate Database Locations</TD
></TR
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></DIV
></BODY
></HTML
>
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