mysql: if similar row exists set field=1

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mysql: if similar row exists set field=1

09-28-2008, 08:54 AM

Marco van Herwaarden Marco van Herwaarden is offline

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[sql]UPDATE TABLENAME AS t1, TABLENAME AS t2
SET t1.friend = 1
WHERE t1.user_id = t2.contact_id AND t1.contact_id = t2.user_id;[/sql]
Replace TABLENAME (twice) by your tablename.

Not tested, so make backup before running this.

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