我用到的数据库为,mysql数据库5.7版本的 1.首先自己准备好数据库表 其实我在插入1000万条数据的时候遇到了一些问题,现在先来解决他们,一开始我插入100万条数据时候报错,控制台的信息如下: com.mysql.jdbc.PacketTooBigException: Packet for query is too large (4232009 > 4194304). You can change this value on the server by setting the max_al…
1209. 1, 10, 100, 1000... Time limit: 1.0 secondMemory limit: 64 MB Let's consider an infinite sequence of digits constructed of ascending powers of 10 written one after another. Here is the beginning of the sequence: 110100100010000… You are to find…
原文链接:http://blog.csdn.net/phoenix36999/article/details/53304126 首先排除数据回滚及增加删除等操作. 按照这篇文章SQL Server 2012 Auto Identity Column Value Jump Issue的方法,就可以解决问题了. 以下是内容: Introduction From SQL Server 2012 version, when SQL Server instance is restarted, then t…