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create table SalesOrder(
OrderID int,            --¶©µ¥id
OrderQty decimal(18,2)  --ÊýÁ¿
)
go
--²åÈëÊý¾Ý
insert into SalesOrder
select 1,2.0
union all
select 1,1.0
union all
select 1,3.0
union all
select 2,6.0
union all
select 2,1.1
union all
select 3,8.0
union all
select 3,1.1
union all
select 3,7.0
go
--²éѯµÃÈçϽá¹û
select * from SalesOrder
go
OrderID     OrderQty
----------- ------------
1           2.00
1           1.00
1           3.00
2           6.00
2           1.10
3           8.00
3           1.10
3           7.00
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OrderID OrderQty »ã×Ü      ÿµ¥±ÈÀý     ·Ö×é»ã×Ü     ÿµ¥ÔÚ¸÷×é±ÈÀý
1            2.00     29.20     


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import jxl.*;
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  public static void main(String args[])
  {
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   {
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select 2|8       --10
select 2|8|1    --11
select 10&8    --8,°üº¬,10=8+2
select 10&2    --2,°üº¬,10=2+8
select 10&4    --0,²»°üº¬
select 19&16  --16,°üº¬,19=16+2+1
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