stratified sampling sql
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showing results for - "stratified sampling sql"
Benjamin
11 Apr 2020
1select d.*
2from (select d.*,
3 row_number() over (order by coursecode, newid) as seqnum,
4 count(*) over () as cnt
5 from degree d
6 ) d
7where seqnum % (cnt / 500) = 1;similar questions
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