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Di., 01/11/2016 - 12:16
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http://stackoverflow.com/questions/1799518/mysql-duplicate-rows-duplicate-detected-using-2-columns
http://stackoverflow.com/questions/16324328/mysql-select-records-for-duplicates-using-multiple-columns
http://stackoverflow.com/questions/4685173/delete-all-duplicate-rows-except-for-one-in-mysql
http://stackoverflow.com/questions/14340820/find-and-remove-duplicate-rows-by-two-columns
Unique Index
- ALTER IGNORE TABLE your_table ADD UNIQUE (field1,field2,field3);
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