ããã«ã¡ã¯ãDBAã®ããªãã§ãã MyISAMã¨ã³ã¸ã³ã«ã¯ãPrimary Keyã®2ã«ã©ã ç®ä»¥éã«AUTO_INCREMENTãä»è¾¼ãã§1ã«ã©ã ç®ãã¨ã«2ã«ã©ã ç®ãã¤ã³ã¯ãªã¡ã³ããããâ¦ãªãã¦æ©è½ãããã¾ãã âèªåã§æ¸ãã¦ã¦ããããããªãã§ãããâãããªãã¤ã§ãã CREATE TABLE blog ( writer varchar(64) NOT NULL, writer_seq tinyint unsigned NOT NULL AUTO_INCREMENT, title varchar(255) NOT NULL, post_date date NOT NULL, PRIMARY KEY (writer, writer_seq) ) ENGINE=MyISAM; INSERT INTO blog (writer, title, post_date) VALUES ('ãã¤ã',
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