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how select random records from table with unique values


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hi all


In my project i need to select random records from table with unique values


i had implemented this with mysql rand function but i am gettng repated records with this function


in sql we have newid() function which gives random+unique records.


how can we do this mysql or using php


i use rand() as "select * from tablename order by rand()"


any help?


thanks in advance


best regards



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