https://blog.youkuaiyun.com/JLegendzh-cnhttps://blog.youkuaiyun.com/https://blog.youkuaiyun.com/JLegend/article/details/27320023https://blog.youkuaiyun.com/JLegend/article/details/27320023JLegendWed, 28 May 2014 11:08:29 +0800https://blog.youkuaiyun.com/JLegend/article/details/27207483https://blog.youkuaiyun.com/JLegend/article/details/27207483JLegendTue, 27 May 2014 15:31:08 +0800exists,not in=>not exists,not null, 索引字段计算，索引字段使用函数，0 or a 2、利用SGA共享池，避开parse阶段--变量绑定（语法检查，语义分析，编译，执行，缓存） 3、where条件执行顺序：从后往前，那些可以过滤掉最大数量记录的条件必须写在WHERE子句的末尾。 4、减少解析时间：a、SELECT子句中避免]]>https://blog.youkuaiyun.com/JLegend/article/details/26862191https://blog.youkuaiyun.com/JLegend/article/details/26862191JLegendSat, 24 May 2014 19:53:50 +0800https://blog.youkuaiyun.com/JLegend/article/details/26862075https://blog.youkuaiyun.com/JLegend/article/details/26862075JLegendSat, 24 May 2014 19:50:54 +0800https://blog.youkuaiyun.com/JLegend/article/details/26702311https://blog.youkuaiyun.com/JLegend/article/details/26702311JLegendFri, 23 May 2014 14:25:39 +0800https://blog.youkuaiyun.com/JLegend/article/details/26585955https://blog.youkuaiyun.com/JLegend/article/details/26585955JLegendThu, 22 May 2014 14:43:19 +0800https://blog.youkuaiyun.com/JLegend/article/details/26089901https://blog.youkuaiyun.com/JLegend/article/details/26089901JLegendSat, 17 May 2014 18:52:39 +0800https://blog.youkuaiyun.com/JLegend/article/details/25608739https://blog.youkuaiyun.com/JLegend/article/details/25608739JLegendMon, 12 May 2014 12:04:31 +0800https://blog.youkuaiyun.com/JLegend/article/details/25543113https://blog.youkuaiyun.com/JLegend/article/details/25543113JLegendSun, 11 May 2014 14:00:29 +0800https://blog.youkuaiyun.com/JLegend/article/details/25341453https://blog.youkuaiyun.com/JLegend/article/details/25341453JLegendThu, 08 May 2014 22:37:37 +0800https://blog.youkuaiyun.com/JLegend/article/details/25200953https://blog.youkuaiyun.com/JLegend/article/details/25200953JLegendWed, 07 May 2014 12:06:04 +0800https://blog.youkuaiyun.com/JLegend/article/details/22902633https://blog.youkuaiyun.com/JLegend/article/details/22902633JLegendFri, 04 Apr 2014 00:10:23 +0800https://blog.youkuaiyun.com/JLegend/article/details/22827803https://blog.youkuaiyun.com/JLegend/article/details/22827803JLegendWed, 02 Apr 2014 22:43:21 +0800https://blog.youkuaiyun.com/JLegend/article/details/22760825https://blog.youkuaiyun.com/JLegend/article/details/22760825JLegendTue, 01 Apr 2014 23:11:09 +0800https://blog.youkuaiyun.com/JLegend/article/details/21893155https://blog.youkuaiyun.com/JLegend/article/details/21893155JLegendSun, 23 Mar 2014 23:53:43 +0800https://blog.youkuaiyun.com/JLegend/article/details/21873267https://blog.youkuaiyun.com/JLegend/article/details/21873267JLegendSun, 23 Mar 2014 15:41:53 +0800https://blog.youkuaiyun.com/JLegend/article/details/20695971https://blog.youkuaiyun.com/JLegend/article/details/20695971JLegendFri, 07 Mar 2014 10:49:19 +0800https://blog.youkuaiyun.com/JLegend/article/details/19972259https://blog.youkuaiyun.com/JLegend/article/details/19972259JLegendWed, 26 Feb 2014 12:00:05 +0800https://blog.youkuaiyun.com/JLegend/article/details/19623289https://blog.youkuaiyun.com/JLegend/article/details/19623289JLegendFri, 21 Feb 2014 15:30:49 +0800Run as -> Run on Server情况下，会找不到WebContent/WEB-INF/lib下的jar，这个目录的确也没有放jar包。  ]]>https://blog.youkuaiyun.com/JLegend/article/details/19156423https://blog.youkuaiyun.com/JLegend/article/details/19156423JLegendThu, 13 Feb 2014 12:01:02 +0800