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WITH | |
counties AS ( | |
SELECT | |
a.total_pop, | |
b.* | |
FROM | |
`bigquery-public-data.census_bureau_acs.county_2018_1yr` a | |
JOIN | |
`bigquery-public-data.geo_us_boundaries.counties` b | |
USING | |
(geo_id) ) | |
SELECT | |
state_fips_code, | |
# here we use the CASE expression to say when the total_pop is over 500k, then include the value, otherwise count it as null | |
# more here: https://cloud.google.com/bigquery/docs/reference/standard-sql/conditional_expressions#case | |
AVG(CASE | |
WHEN total_pop > 500000 THEN total_pop | |
ELSE | |
NULL | |
END | |
) | |
FROM | |
counties | |
GROUP BY | |
state_fips_code |
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