mysql的默认排序规则探讨 3个SQL语句的不同结果（注意sid的值）： ? mysql? select ? sid,order_no,order_status? from ? oms_order???limit?10; + -----+----------------+--------------+ |?sid?|?order_no???????|?order_status?| + -----+---------------
mysql的默认排序规则探讨
3个SQL语句的不同结果（注意sid的值）：
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mysql>?select?sid,order_no,order_status?from?oms_order???limit?10;+-----+----------------+--------------+|?sid?|?order_no???????|?order_status?|+-----+----------------+--------------+|??20?|?20100319000003?|????????????0?||??21?|?20100319000004?|????????????0?||??63?|?20100319000046?|???????????-1?||??69?|?20100320000006?|????????????0?||??76?|?20100323000001?|????????????0?||??77?|?20100323000002?|????????????0?||??78?|?20100323000003?|????????????0?||??79?|?20100323000004?|????????????8?||??86?|?20100324000007?|???????????-1?||??93?|?20100324000014?|???????????-1?|+-----+----------------+--------------+10?rows?in?set?(0.00?sec)?mysql>?select?sid,order_status?from?oms_order???limit?10;+-----+--------------+|?sid?|?order_status?|+-----+--------------+|?240?|???????????-1?||?261?|???????????-1?||?263?|???????????-1?||?285?|???????????-1?||?286?|???????????-1?||?288?|???????????-1?||?339?|???????????-1?||?383?|???????????-1?||?387?|???????????-1?||?452?|???????????-1?|+-----+--------------+10?rows?in?set?(0.00?sec)?mysql>?select?sid?from?oms_order???limit?10;+---------+|?sid?????|+---------+|?1171641?||?1171651?||?1171661?||?1171671?||?1171681?||?1171691?||?1171701?||??????20?||??????21?||??????63?|+---------+10?rows?in?set?(0.00?sec)?排序规则：??以上信息整理与互联网，笔者本人还没完全搞懂，大家可以探讨！
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