mirrors/postgres
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

SGML improvements to the DML chapter.

Browse Source
This commit is contained in:
Neil Conway 2005-03-01 23:45:00 +00:00
parent a2ad04f4b0
commit 87aafa1600
1 changed files with 14 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

24
doc/src/sgml/dml.sgml
View File

@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/dml.sgml,v 1.10 2005/01/22 22:56:35 momjian Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/dml.sgml,v 1.11 2005/03/01 23:45:00 neilc Exp $ -->
<chapter id="dml">
<title>Data Manipulation</title>
@ -38,10 +38,10 @@
</para>
<para>
To create a new row, use the <literal>INSERT</literal> command.
The command requires the table name and a value for each of the
columns of the table. For example, consider the products table
from <xref linkend="ddl">:
To create a new row, use the <xref linkend="sql-insert"
xreflabel="sql-insert-title"> command. The command requires the
table name and a value for each of the columns of the table. For
example, consider the products table from <xref linkend="ddl">:
<programlisting>
CREATE TABLE products (
product_no integer,
@ -98,7 +98,9 @@ INSERT INTO products DEFAULT VALUES;
To do <quote>bulk loads</quote>, that is, inserting a lot of data,
take a look at the <xref linkend="sql-copy"
endterm="sql-copy-title"> command. It is not as flexible as the
<command>INSERT</command> command, but is more efficient.
<command>INSERT</command> command, but is more efficient. Refer to
<xref linkend="populate"> for more information on improving bulk
loading performance.
</para>
</tip>
</sect1>
@ -188,7 +190,7 @@ UPDATE products SET price = price * 1.10;
<para>
You can update more than one column in an
<literal>UPDATE</literal> command by listing more than one
<command>UPDATE</command> command by listing more than one
assignment in the <literal>SET</literal> clause. For example:
<programlisting>
UPDATE mytable SET a = 5, b = 3, c = 1 WHERE a &gt; 0;
@ -222,9 +224,11 @@ UPDATE mytable SET a = 5, b = 3, c = 1 WHERE a &gt; 0;
</para>
<para>
You use the <literal>DELETE</literal> command to remove rows; the
syntax is very similar to the <literal>UPDATE</literal> command.
For instance, to remove all rows from the products table that have a price of 10, use
You use the <xref linkend="sql-delete"
xreflabel="sql-delete-title"> command to remove rows; the syntax is
very similar to the <command>UPDATE</command> command. For
instance, to remove all rows from the products table that have a
price of 10, use
<programlisting>
DELETE FROM products WHERE price = 10;
</programlisting>