PostgreSQL/Analytical Functions/width bucket
width_bucket(op numeric, b1 numeric, b2 numeric, count int)
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--width_bucket(op numeric, b1 numeric, b2 numeric, count int) --Return the bucket to which operand would be assigned in an equidepth histogram with count --buckets, an upper bound of b1, and a --lower bound of b2
postgres=# postgres=# select width_bucket(5.35, 0.024, 10.06, 5);
width_bucket
3
(1 row) postgres=#
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