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Mysql中的事件(定时任务)
一、什么是事件一组SQL集,用来执行定时任务,跟触发器很像,都是被动执行的,事件是因为时间到了触发执行,而触发器是因为某件事件(增删改)触发执行;二、开启事件查看是否开启:show variables like 'event_scheduler';如果显示OFF,则输入以下语句开启:set glob...
分类:数据库   时间:2016-01-17 16:04:43    阅读次数:159
Codeforces Gym 100015F Fighting for Triangles 状态压缩DP
F Fighting for Triangles DescriptionAndy and Ralph are playing a two-player game on a triangular board that looks like the following:1 234 ...
分类:其他好文   时间:2016-01-16 22:26:53    阅读次数:265
NYOJ 284 坦克大战 【BFS】+【优先队列】
坦克大战时间限制:1000ms | 内存限制:65535KB难度:3描写叙述Many of us had played the game "Battle city" in our childhood, and some people (like me) even often play it on c...
分类:其他好文   时间:2016-01-16 20:59:21    阅读次数:207
Linq 两个集合模糊查询
1、Linq的likelist l=new list();l.add("ss")l.add("ss123");l.add("sssdf");查找方式 ss___ 查找前面2个是ss后面是3位的, 类似sql的select * from table where col like 'ss___'需要怎....
分类:其他好文   时间:2016-01-15 16:10:07    阅读次数:175
常用aliyun公共资源列表
公共DNS223.5.5.5223.6.6.6源软件镜像站点mirros.aliyun.comNTP服务器unix like ntp1-7.aliyun.com time1-7.aliyun.com注: ntp1-7同time1-7的主机名解析到的IP地址是一样的,应该是CNAME.Windows....
分类:其他好文   时间:2016-01-15 14:22:17    阅读次数:392
设置内存管理
SELECT name, value FROM v$parameter WHERE name like '%target%'; select value/1024/1024/1024 as Value_G from dual; select * from V$MEMORY_TARGET_ADVICE...
分类:其他好文   时间:2016-01-13 12:52:36    阅读次数:110
Conscientiously Objecting the Living Room War
Time was, you’d buy a TV, bring it home and plant it in your living room. And you’d watch it. For like a decade. And then, when the picture started fa...
分类:其他好文   时间:2016-01-13 02:03:50    阅读次数:209
SQL
where Cname like 'DB\Design' escape'\';--escape'\' 表示'\'--聚集函数select count(distinct sno)select avg(grade)select max(grade)select sum(ccredit)聚集函数只能用于s...
分类:数据库   时间:2016-01-12 15:28:52    阅读次数:158
hadoop文件命令
The File System (FS) shell includes various shell-like commands that directly interact with the Hadoop Distributed File System (HDFS) as well as other...
分类:其他好文   时间:2016-01-11 13:57:17    阅读次数:140
mysql ERROR 126 (HY000): Incorrect key file for table '/tmp/#sql_1d87_0.MYI'; try to repair it
[root@localhost ~]# df -h 查看是否空间不足在查看mysql数据目录情况mysql> show variables like '%dir%';+-----------------------------------------+------------------------...
分类:数据库   时间:2016-01-11 12:09:46    阅读次数:223
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