Skip to content
December 18, 2015 / doganay

SPLIT DATASET INTO UNIFORM CHUNKS

SELECT MIN (row_id)
|| '|'
|| MAX (row_id)
|| '|'
|| COUNT (*)
|| '|'
|| chunk
FROM (SELECT row_id, NTILE (256) OVER (ORDER BY row_id) chunk
FROM (SELECT ROWID row_id
FROM t1
)
)
GROUP BY chunk
ORDER BY chunk;
Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s

%d bloggers like this: