mysql insert error 1062

Question

SQL query:

INSERT INTO  `website_categorization`.`category_keyword` (
`ID` ,
`ID_Category` ,
`Keyword` ,
`Score`)
VALUES (
NULL ,  \'18\',  \'free mail\',  \         


        

Answer 1

Your ID_category key is declared as unique and thus you cannot have two entries with the same value.