mysqlã§ã¯ãcharãvarcharã«ã©ã ã«å¯¾ãã¦æ¤ç´¢æ¡ä»¶ï¼whereï¼ãã½ã¼ãï¼order byï¼æã«å¤§æåå°æåãåºå¥ãã¦ããã¾ããã åºå¥ãããå ´åã«ã¯ãã¼ãã«ä½ææã« binaryå±æ§ãè¨å®ããå¿ è¦ãããã¾ãã ï¼é常ã¯ãã®æ¹æ³ã§ã®å¯¾å¿ããå§ããã¾ãï¼ create table binary_column varcolum varcharï¼10ï¼ binary primary key, charcolum charï¼10ï¼ binary ); ãããªæãã§ããããã æ¢ã«ä½ææ¸ã¿ã®ãã¼ãã«ã«å¯¾ãã¦binaryå±æ§ãè¨å®ãããã¨ãå¯è½ã§ãã alter table binary_column modify charcolum charï¼10ï¼ binary; primary keyå±æ§ãè¨å®ããã¦ããã«ã©ã ã«å¯¾ãã¦ã¯ããã§ããã®ã§ãããæ¢ã«primary keyå±æ§ãè¨å®ããã¦ã
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