SELECT ProductName as "产品名称",ProductModel as "产品型号",GuiGe as "产品规格",Material as "材质",Price as "单价",Quantity as "数量",Weight as "重量",Description as "备注" FROM ##tab union all
SELECT ProductName as "产品名称",ProductModel as "产品型号",GuiGe as "产品规格",Material as "材质",Price as "单价",Quantity as "数量",Weight as "重量",Description as "备注" FROM ##tab
-- 多个union 之间的语句列名最好一样
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