ALTER
TABLE
subs
ADD
UNIQUE
(subs_email)
Use INSERT … ON DUPLICATE KEY UPDATE:INSERT
INTO
subs
(subs_name, subs_email, subs_birthday)
VALUES
(?, ?, ?)
ON
DUPLICATE
KEY
UPDATE
subs_name =
VALUES
(subs_name),
subs_birthday =
VALUES
(subs_birthday)
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