>>Sergey,
>>
>>I have seen this mentioned in some SQL tips, but in "official" docs I had not seen
>>stated that NewID produces random data
>>(in the statistical meaning - usable for sampling&testing)
>>or the scale level it can be used at (more than ordinal ?)
>>
>>Did you read some MS doc certifying fitness for that usage
>>or a test on the robustness when used this way ?
>>Any links to throw my way ?
>>
>>thx
>>
>>thomas
>>
>>
>I've seen a very good link where this concept was used by Paul White
>
>Advanced T-SQL Tuning - Why Internals Knowledge Matters
>
>BTW, you can also check TABLESAMPLE in BOL (it does show NewID() approach).

Will read it later - were they concerned with "fitness" of the random distribution ?
Random in the sense used in testing theory can be tested itself...

thx

thomas