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benjaminestes/semidifference.sql

Last active April 15, 2023 03:49
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Semidifference or semijoin operations in BigQuery
Raw
semidifference.sql
#standardSQL
WITH
a AS (
SELECT
num
FROM
UNNEST(GENERATE_ARRAY(1, 6)) AS num),
b AS (
SELECT
num
FROM
UNNEST(GENERATE_ARRAY(3, 8)) AS num)
SELECT
DISTINCT num
FROM
a WHERE
-- Or 'IN' for semijoin
(num) NOT IN (
SELECT
num
FROM
b)
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