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FROM tmp_jasUsers tju
-- LEFT means select all rows from tju ...
LEFT JOIN Users u ON u.Email = tju.emailAddr
-- That don't have a matching u
WHERE u.Email IS NULL
-- or the IN approach
SELECT * FROM tmp_jasUsers WHERE emailAddr NOT IN (SELECT Email FROM Users)
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While there were several headline-grabbing ransomware attacks during in 2017, another big threat started appearing at the same time that didn’t get the same coverage – illicit cryptomining.
WHERE emailAddr IN (
GROUP BY Email
HAVING COUNT(Email) > 1)
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