mysql聯合查詢和關聯查詢

最近面試中，Java的都會考察數據庫，寫SQL語句，大多數就問關聯查詢，索引mysql 看看下面三個關聯查詢的 SQL 語句有何區別？ SELECT * FROM score, student WHERE score.id = student.id ... SELECT * FROM score JOIN student ON (score.id = student.id) WHERE ...

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