ibatis 中怎么写这句sql:select @myWidth:=right_value-left_value+...
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<dynamic prepend="where">
<isNotEmpty prepend="and" property="result">
<![CDATA[ SITENO in ]]>
<iterate property="result" conjunction="," open="(" close=")">
#result[]#
</iterate>
</isNotEmpty>
</dynamic>
