org.mybatis.spring.MyBatisSystemException: nested exception is org.apache.ibatis.exceptions.PersistenceException: ### Error querying database. Cause:....
分类:
数据库 时间:
2015-05-01 19:52:39
阅读次数:
1689
过了之后感觉曾经真的做过这样的类型的题。之前一直非常疑惑二级排序的优先级问题,如今发现二级排序真的没有绝对的优先级。对于此题,若按W排序,则有1到i件物品的W均小于等于第i+1件物品(设为A)的W,那么对于第i+1件我们在[1,i]中要选取一个B,使得B.w #include #include #i...
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其他好文 时间:
2015-05-01 12:00:54
阅读次数:
98
多表之间三种join方式:Nested Loops,Hash Join 和 Sort Merge Join的工作过程及适用情况
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其他好文 时间:
2015-04-30 19:59:55
阅读次数:
168
1.报错:java.rmi.server.ExportException: Port already in use: 1098; nested exception is: java.net.BindException: Address already in use: JVM_Bind此错误常在4.2...
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其他好文 时间:
2015-04-28 22:25:02
阅读次数:
187
Description
There are N beads which of the same shape and size, but with different weights. N is an odd number and the beads are labeled as 1, 2, ..., N. Your task is to find the bead whose weight ...
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其他好文 时间:
2015-04-28 21:04:04
阅读次数:
175
一、问题起源在MySQL的官方文档中有明确的说明不支持嵌套事务:1. Transactions cannot be nested. This is a consequence of the implicit commit performed for any current transaction w...
分类:
数据库 时间:
2015-04-28 20:15:49
阅读次数:
245
Labeling Balls
Time Limit: 1000MS
Memory Limit: 65536K
Total Submissions: 11469
Accepted: 3295
Description
Windy has N balls of distinct weights from 1 unit to N un...
分类:
编程语言 时间:
2015-04-24 19:15:12
阅读次数:
176
一、问题起源 在MySQL的官方文档中有明确的说明不支持嵌套事务: [sql]?view plaincopy Transactions?cannot?be?nested.?This?is?a?consequence?of?the?implicit?commit?performed?for?any?curre...
分类:
数据库 时间:
2015-04-23 16:00:56
阅读次数:
155
一、问题起源
在MySQL的官方文档中有明确的说明不支持嵌套事务:
1. Transactions cannot be nested. This is a consequence of the implicit commit performed for any current transaction when you issue a START TRANSACTION statement or...
分类:
数据库 时间:
2015-04-23 15:49:47
阅读次数:
179