p0vidl0/drop_duplicates.sql

Last active July 26, 2021 11:48

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Delete all duplicate rows based on the email field

Raw

drop_duplicates.sql

DELETE c1 FROM `clients` c1, `clients` c2 WHERE c1.`id` < c2.`id` AND c1.`email` = c2.`email`;

Author

p0vidl0 commented Jul 23, 2018 •

edited

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Useful before creating unique index for field email. Leaves one row of duplicates with greatest id.

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