我有两个表: 客户--->> 船舶
我想为每个客户提供独一无二的批量,例如,
CustomerID ShipmentID ShipmnetNumber
10 50 1
10 51 2
10 55 3
15 56 1
15 57 2
15 58 3
17 59 1
17 60 2
......
• 我如何在2008年ql服务器上这样做
问你可以这样做。
select CustomerID,
ShipmentID,
row_number() over(partition by Shipment.CustomerID
order by ShipmentID) as ShipmentNumber
from Shipment
If you want to update a table with ShipmentNumber (newly added column) you can do this
;with S as
(
select ShipmentNumber,
row_number() over(partition by Shipment.CustomerID
order by ShipmentID) as ShipNum
from Shipment
)
update S
set ShipmentNumber = ShipNum
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