将:
cmd.CommandText = "SELECT DISTINCT 工厂,类别,材质 From {金嘉福}"
改为:
cmd.CommandText = "SELECT DISTINCT 工厂,类别,材质 From {金嘉福} UNION ALL SELECT DISTINCT 工厂,类别,材质 From {另一个表}"
建议看看:
http://www.foxtable.com/help/topics/0688.htm