java - (JDBC) Mysql query with if statement and multiple conditions -

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what proper syntax mysql-java statement such 1 ?

preparedstatement st =connection.preparestatement("select name, value, quantity sales if (type=='purchase' , state=='confirmed') or (type=='sale' , state=='not confirmed'))  ;

the sql like:

select name, value, quantity sales  (type = 'purchase' , state = 'confirmed') or       (type = 'sale' , state = 'not confirmed');

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