12 2018 档案

摘要:1、PRIMARY KEY(主键索引)添加 ALTER TABLE `table_name` ADD PRIMARY KEY ( `column` );删除 ALTER TABLE `table_name` DROP PRIMARY KEY;2、UNIQUE(... 阅读全文
posted @ 2018-12-18 16:35 byfei 阅读(62) 评论(0) 推荐(0) 编辑
摘要:--概率算法local randlist = {85,60,55,50,50,40,35,25,20,15,12,10,10,5,5} --概率local countlist = {0,0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0... 阅读全文
posted @ 2018-12-01 05:16 byfei 阅读(63) 评论(0) 推荐(0) 编辑