如何创建十六进制身份自动增量列sql server

Question

Can anyone tell me how to create an identity column with auto increment storing hexadecimal values in sql server 2008 r2? (I am looking for this function to use as OrderID and PaymentID in my small time shopping cart)

Answer 1

SQL doesn't have native hex data type. You can save it as varbinary, but still it would need conversion.

    SELECT CONVERT( VARBINARY(8), 100)
    --> 0x00000064

I would say that you use new computed column where you put these hex values, and let identity column remain int.

Answer 2

您可以使用NEWSEQUENTIALID（），但不能使用顺序的但唯一的

col uniqueidentifier default NEWSEQUENTIALID()