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This commit is contained in:
Peter Eisentraut
2004-12-13 18:05:10 +00:00
parent cc4f22c167
commit 5ec30faee6
27 changed files with 183 additions and 194 deletions
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doc/src/sgml/ddl.sgml
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@@ -1,4 +1,4 @@
<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.33 2004/11/27 21:27:06 petere Exp $ -->
<!-- $PostgreSQL: pgsql/doc/src/sgml/ddl.sgml,v 1.34 2004/12/13 18:05:08 petere Exp $ -->
<chapter id="ddl">
<title>Data Definition</title>
@@ -1148,7 +1148,7 @@ WHERE c.altitude &gt; 500 and c.tableoid = p.oid;
<literal>UNIQUE</> or a <literal>PRIMARY KEY</>, this would not stop the
<structname>capitals</> table from having rows with names duplicating
rows in <structname>cities</>. And those duplicate rows would by
default show up in SELECTs from <structname>cities</>. In fact, by
default show up in queries from <structname>cities</>. In fact, by
default <structname>capitals</> would have no unique constraint at all,
and so could contain multiple rows with the same name.
You could add a unique constraint to <structname>capitals</>, but this