1. Unicodeæ¯ä»ä¹
Unicodeï¼ä¸æï¼ä¸å½ç ãå½é
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2. UTF-8æ¯ä»ä¹
UTF-8ï¼8-bit Unicode Transformation Formatï¼æ¯ä¸ç§é对Unicodeçå¯åé¿åº¦å符ç¼ç ãå¯åé¿åº¦çææå¨äºï¼å¦æè½ä½¿ç¨1åèç¼ç ï¼UTF-8ç»å¯¹ä¸ä¼ä½¿ç¨2åèå»è¡¨ç¤ºã举个ä¾åï¼UTF-8ç1åèé¨ååASCIIç æ¯ç¸åçãæ以表示'A'è¿ä¸ªå符çæ¶åï¼UTF-8ä¸ASCIIç ä¸ä»
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3. Character SetåCollationæ¯ä»ä¹
Character Setæ¯ä¸å¥ç¬¦å·ä»¥åç¼ç ãCollationæ¯character setçæåºæ¹æ³ãå¨ä¸æççMySQLä¸ï¼character set被翻è¯ä¸ºâå符éâï¼collation被翻è¯ä¸ºâæ´çâã
举个ä¾åï¼UTF-8æ¯character setï¼utf8_unicode_ciåutf8mb4_unicode_ciå°±æ¯collationã
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