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数据库表中唯一主键 id 用 32 位的 md5 算出来的值是否可行？
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数据库 - @kerb15 - 比如：用户表中，将用户邮箱+密码的值去做 MD5，得出来的值作为 userId订单表中，将订单数据+时间戳的值去做 MD5，得出来的值作为订单 Id主要的疑问是，32 位的
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