直接引用表
select * from [数据$]

直接关联多张表
select * from [苏州$] union all select * from [无锡$] union all select * from [昆山$]

关联表时加入标识字段
select "苏州" as 城市,* from [苏州$] union all select "无锡" as 城市,* from [无锡$] union all select "昆山" as 城市,* from [昆山$]

汇总结构不同的表
select "苏州" as 城市,日期,产品类别,金额 from [苏州$] union all select "无锡" as 城市,日期,产品类别,金额 from [无锡$] union all select "昆山" as 城市,日期,产品类别,金额 from [昆山$]

汇总计划与实际完成
select "实际完成" as 类型,* from [销售数据$] union all select "计划完成" as 类型,null,null,null,null,null,null,所属区域,null,null,金额,null from [销售计划$]

select "实际销量" as 类型,* from [销售数据$] union all select "计划销量" as 类型,null,null,销售部门,null,null,null,所属区域,产品类别,null,金额,null from [销售计划$]l,null,null,null,所属区域,null,null,金额,null from [销售计划$]

select "南京" as 城市,"宠物用品" as 产品类别,* from [e:\数据\数据1\南京.xls].[宠物用品$]


select "南京" as 城市,"宠物用品" as 产品类别,* from [e:\数据\数据1\南京.xls].[宠物用品$] union all select "南京" as 城市,"警告标志" as 产品类别,* from [e:\数据\数据1\南京.xls].[警告标志$] union all select "南京" as 城市,"户外睡袋" as 产品类别,* from [e:\数据\数据1\南京.xls].[户外睡袋$] union all select "苏州" as 城市,"宠物用品" as 产品类别,* from [e:\数据\数据1\苏州.xls].[宠物用品$] union all select "苏州" as 城市,"警告标志" as 产品类别,* from [e:\数据\数据1\苏州.xls].[警告标志$] union all select "苏州" as 城市,"户外睡袋" as 产品类别,* from [e:\数据\数据1\苏州.xls].[户外睡袋$]


select * from [数据$] left join [产品信息$] on [数据$].产品类别=[产品信息$].品名
select [数据$].*,[产品信息$].产品单价 from [数据$] left join [产品信息$] on [数据$].产品类别=[产品信息$].品名
select [产品信息$].产品单价,[数据$].* from [数据$] left join [产品信息$] on [数据$].产品类别=[产品信息$].品名


select A.产品类别,A.数量,B.产品单价 from [数据$]A left join [产品信息$]B on A.产品类别=B.品名


select [数据$].*,[产品信息$].产品单价,[产品信息$].[P/N] from [数据$] left join [产品信息$] on [数据$].产品类别=[产品信息$].品名


select [数据$].*,[产品信息$].产品单价 from [数据$] inner join [产品信息$] on [数据$].产品类别=[产品信息$].品名

select * from ([数据$]A left join [产品信息$]B on A.产品类别=B.品名) left join [促销信息$]C on A.产品类别=C.品名

select A.*,B.[P/N],B.产品单价,C.折扣 from ([数据$]A left join [产品信息$]B on A.产品类别=B.品名) left join [促销信息$]C on A.产品类别=C.品名