Am looking to use an approach in saving passwords that requires using byte array as in this post
So which data type should i use in sql server to save byte array? an
If it's always going to be the same length, then binary(length) would be suitable. If it's going to vary in length, use varbinary(maxlength).
binary(length)
varbinary(maxlength)
binary and varbinary.
And, as @p.s.w.g says, you pass it from code by placing it into a suitable parameter.