mysql 给select的结果添加一列序号

SET @mycnt=0;html SELECT @mycnt := @mycnt +1 as mycnt, a.*, b.* post FROM a, b;htm 表中第一列即为mycnt，从1开始计数。blog 转载于:https://www.cnblogs.com/CSGrandeur/archive/2012/11/30/2796382.htmlclass

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