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rikonor/GetOrInsert.sql

Created August 18, 2016 21:12
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GetOrInsert.sql
WITH
OldEntry AS (
SELECT domain_id FROM domains WHERE domain = 'google.com'
),
NewEntry AS (
INSERT INTO domains (domain)
SELECT 'google.com'
WHERE NOT EXISTS (
SELECT domain_id FROM OldEntry
)
RETURNING domain_id
)
SELECT domain_id FROM NewEntry
UNION ALL
SELECT domain_id FROM OldEntry;
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