Hi, update table_combined or the two small tables, table_1 and table_2?<div><br><br><div class="gmail_quote">2009/3/23 Jens Oehlschlägel <span dir="ltr">&lt;<a href="mailto:joehl@web.de">joehl@web.de</a>&gt;</span><br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex;">
Yue,<br>
<div class="im"><br>
&gt;    select count(*)  from table_combined;<br>
<br>
</div>What do you get if you update one of your double columns to 1.0<br>
and do a SUM() over this column?<br>
<font color="#888888"><br>
Jens<br>
</font><div><div></div><div class="h5"><br>
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