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Convert documentation to DocBook XML
Since some preparation work had already been done, the only source changes left were changing empty-element tags like <xref linkend="foo"> to <xref linkend="foo"/>, and changing the DOCTYPE. The source files are still named *.sgml, but they are actually XML files now. Renaming could be considered later. In the build system, the intermediate step to convert from SGML to XML is removed. Everything is build straight from the source files again. The OpenSP (or the old SP) package is no longer needed. The documentation toolchain instructions are updated and are much simpler now. Peter Eisentraut, Alexander Lakhin, Jürgen Purtz
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@@ -12,7 +12,7 @@
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tutorial is only intended to give you an introduction and is in no
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way a complete tutorial on <acronym>SQL</acronym>. Numerous books
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have been written on <acronym>SQL</acronym>, including <xref
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linkend="melt93"> and <xref linkend="date97">.
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linkend="melt93"/> and <xref linkend="date97"/>.
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You should be aware that some <productname>PostgreSQL</productname>
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language features are extensions to the standard.
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</para>
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@@ -267,7 +267,7 @@ COPY weather FROM '/home/user/weather.txt';
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where the file name for the source file must be available on the
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machine running the backend process, not the client, since the backend process
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reads the file directly. You can read more about the
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<command>COPY</command> command in <xref linkend="sql-copy">.
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<command>COPY</command> command in <xref linkend="sql-copy"/>.
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</para>
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</sect1>
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@@ -754,7 +754,7 @@ SELECT city, max(temp_lo)
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<programlisting>
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SELECT city, max(temp_lo)
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FROM weather
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WHERE city LIKE 'S%' -- <co id="co.tutorial-agg-like">
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WHERE city LIKE 'S%' -- <co id="co.tutorial-agg-like"/>
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GROUP BY city
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HAVING max(temp_lo) < 40;
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</programlisting>
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@@ -762,7 +762,7 @@ SELECT city, max(temp_lo)
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<callout arearefs="co.tutorial-agg-like">
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<para>
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The <literal>LIKE</literal> operator does pattern matching and
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is explained in <xref linkend="functions-matching">.
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is explained in <xref linkend="functions-matching"/>.
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</para>
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</callout>
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</calloutlist>
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