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Big editing for consistent content and presentation.

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This commit is contained in:
Peter Eisentraut
2003-03-13 01:30:29 +00:00
parent 31e69ccb21
commit 706a32cdf6
24 changed files with 4695 additions and 5079 deletions
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10
doc/src/sgml/query.sgml
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@ -1,5 +1,5 @@
<!--
$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.28 2002/11/11 20:14:03 petere Exp $
$Header: /cvsroot/pgsql/doc/src/sgml/query.sgml,v 1.29 2003/03/13 01:30:29 petere Exp $
-->
<chapter id="tutorial-sql">
@ -214,7 +214,7 @@ INSERT INTO weather VALUES ('San Francisco', 46, 50, 0.25, '1994-11-27');
The <type>point</type> type requires a coordinate pair as input,
as shown here:
<programlisting>
INSERT INTO cities VALUES ('San Francisco', '(-194.0, 53.0)');
INSERT INTO cities VALUES ('San Francisco', '(-194.0, 53.0)');
</programlisting>
</para>
@ -296,7 +296,7 @@ SELECT * FROM weather;
</para>
<para>
You may specify any arbitrary expressions in the target list. For
You may specify any arbitrary expressions in the select list. For
example, you can do:
<programlisting>
SELECT city, (temp_hi+temp_lo)/2 AS temp_avg, date FROM weather;
@ -339,7 +339,7 @@ SELECT * FROM weather
<indexterm><primary>DISTINCT</primary></indexterm>
<indexterm><primary>duplicate</primary></indexterm>
As a final note, you can request that the results of a select can
As a final note, you can request that the results of a query can
be returned in sorted order or with duplicate rows removed:
<programlisting>
@ -710,7 +710,7 @@ SELECT city, max(temp_lo)
<literal>WHERE</literal> clause must not contain aggregate functions;
it makes no sense to try to use an aggregate to determine which rows
will be inputs to the aggregates. On the other hand,
<literal>HAVING</literal> clauses always contain aggregate functions.
<literal>HAVING</literal> clause always contains aggregate functions.
(Strictly speaking, you are allowed to write a <literal>HAVING</literal>
clause that doesn't use aggregates, but it's wasteful: The same condition
could be used more efficiently at the <literal>WHERE</literal> stage.)