Question

Does anyone know of a way to generate a RNGCryptoServiceProvider-like random number in T-SQL without having to register any .NET Assemblies?

Answer 1

SELECT CHECKSUM(NEWID()) gives you a 32 signed integer based on GUIDs. You can use this as base: it’s pretty much the best SQL way

You can use it to seed RAND (because RAND is the same for all rows in a single select.

SELECT RAND(CHECKSUM(NEWID()))

A signed 64 bit integer:

SELECT CAST(CHECKSUM(NEWID()) as bigint) * CAST(CHECKSUM(NEWID()) as bigint)

With some playing around you could cast and/or concatenate to get binary(“multiples of 4”) etc to build up a byte array… I’ve not used the RAND thingy though to emulate directly