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搜索关键字:in where clause is ambiguous    ( 20582个结果
Leetcode:Container With Most Water
戳我去解题Givennnon-negative integersa1,a2, ...,an, where each represents a point at coordinate (i,ai).nvertical lines are drawn such that the two endpoint...
分类:其他好文   时间:2014-07-22 23:09:34    阅读次数:337
How to Build ffmpeg with NDK r9
This is a updated post for a previous post, where webuilt ffmpeg 0.8 with Android NDK r5 and r6. This post will give instructions of how to build ffmp...
分类:其他好文   时间:2014-05-01 13:58:30    阅读次数:621
查找、删除多个字段相同的记录
--查找姓名、性别、年龄、地址、电话相同的员工记录。select count(id) as id_count, name, sex, birthday, address, telfrom staffgroup by name, ...
分类:其他好文   时间:2014-05-01 13:57:05    阅读次数:314
循环查询sql带逗号(,)分隔的数据
select * from sys_role_list where id in (select c from (with test as (select roleid c from sys_role_info where id=1) select substr(t.ca,instr(t.ca,...
分类:数据库   时间:2014-05-01 02:34:49    阅读次数:670
Mybatis 错误Illegal overloaded getter method ....
错误描述:Illegal overloaded getter method with ambiguous type for property parent in class class cn.domain.Menu. This breaks the JavaBeans specification a...
分类:其他好文   时间:2014-04-30 15:24:40    阅读次数:6857
Oracle——函数
CREATE FUNCTION annual_income(spNAme VARCHAR2) RETURN NUMBER IS yearSal number(7,2);BEGIN SELECT (sal+NVL(comm,0))*12 INTO yearSal FROM emp WHERE enam...
分类:数据库   时间:2014-04-29 18:08:00    阅读次数:497
Andy Williams 《Love Story》
where do i beginto tell a story of how great a love can bethe sweet love story that is older than the seathe simple truth about the love she brings to...
分类:其他好文   时间:2014-04-29 17:18:46    阅读次数:342
npm 安装相关环境及测试
0、npm 命令C:\Users\Carrie>npm expressUsage: npm where is one of: add-user, adduser, apihelp, author, bin, bugs, c, cache, completion, config, ddp...
分类:其他好文   时间:2014-04-29 16:31:45    阅读次数:396
复合索引的列顺序判断
复合索引最令人困惑的当属索引列的顺序,不仅依赖于使用该索引的查询,更需考虑排序和分组。前段时候我发了个帖子:where条件顺序和复合索引字段顺序。感兴趣的朋友不妨参与讨论。今天我提个自己的观点。在应用开发阶段,【选择性】是我们首要考虑因素,请看简图:当出现sql性能问题时,你可能需要注意以下几个:1. 随机IO2. 排序(order by)3. 分组(group by or distinct)这时...
分类:其他好文   时间:2014-04-27 21:24:06    阅读次数:353
mysql常用查询:group by,左连接,子查询,having where
前几天去了两个比较牛的互联网公司面试,在sql这块都遇到问题了,哎,可惜呀,先把简单的梳理一下 成绩表 score 1、group by 使用 按某一个维度进行分组 例如: 求每个同学的总分 SELECT student,SUM(score) FROM score GROUP BY student 求每个同学的平均分 SELECT student,AVG(score) FR...
分类:数据库   时间:2014-04-27 21:17:59    阅读次数:614
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