20 Aug 18 ·  nVector in teradata ·        Bookmark ·  Report ·  More actions.. Lock comments ·  Pin thread

How to fetch a sample of data within each group - Teradata

Scenario: We need to select a random sample of 5 in each status type

TABLE1

MEMBERSTATUS
89A
34A
25R
27S
69J
32R
39J
55S
32A

Solution:

SEL     Member, status 
FROM    TABLE1 
QUALIFY ROW_NUMBER() OVER (
            PARTITION BY status 
            ORDER BY NULL) <= 50;


nVector

posted on 20 Aug 18

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