TSQL Increment Cursor (row_number) used instead

So I have the following table:

ID | Product_Image

300 | /300-01.jpg

300 | /300-02.jpg

301 | /301.jpg

302 | /302.jpg

There could be an unlimited number of images per ID. I need to increment a position id based on the the number of references, and I am having trouble generating the following output:

开发者_Go百科ID | Position | Product Images

300 | 1 | /300-01.jpg

300 | 2 | /300-02.jpg

301 | 1 | /301.jpg

Currently I am using a cursor but having trouble with it

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You could use row_number() for that:

select  ID
,       row_number() over (partition by ID order by Product_Image) as Position
,       Product_Image
from    YourTable

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drop the cursor and use the T-SQL ROW_NUMBER with an OVER clause. here is a reference

http://msdn.microsoft.com/en-us/library/ms189461.aspx