码迷,mamicode.com
首页 >  
搜索关键字:where    ( 20257个结果
ORACLE随机查询
1.select * from (select * from tablename order by dbms_random.value) where rownum< N;注:dbms_random是一个可以生成随机数值或者字符串的程序包。value()是最常用的,value()的用法一般有两个种,第...
分类:数据库   时间:2014-05-23 07:12:52    阅读次数:364
SQL注入
昨天做了一张卡,是用于解决SQL注入问题的。现在就把昨天学到和用到的内容总结一下吧:)1. 什么是SQL注入简单的说,SQL注入是一种攻击行为,恶意的向SQL语句中插入某些内容进而达到某些不好的目的。举个例子吧,就是:statement = "SELECT * FROM users WHERE na...
分类:数据库   时间:2014-05-23 06:43:48    阅读次数:418
Advices and Best Practices for Magento developers
I think everyone who is interested in ecommerce development get familiar with Magento earlier or later. It’s a very popular platform, where a lot of m...
分类:其他好文   时间:2014-05-22 00:35:05    阅读次数:555
SQL分页
--第一种分页(TOP方式)--select * from T_Sys_User where User_Id in (select top 10 User_Id from T_Sys_User where User_Id not in(select top (10*0) User_Id from T...
分类:数据库   时间:2014-05-21 22:44:21    阅读次数:485
LeetCode: Combination Sum II [039]
【题目】 Given a collection of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. Each number in C may only be used once in the combination. Note: All numbers (including target) will be ...
分类:其他好文   时间:2014-05-21 15:55:25    阅读次数:259
LeetCode: Combination Sum [038]
【题目】 Given a set of candidate numbers (C) and a target number (T), find all unique combinations in C where the candidate numbers sums to T. The same repeated number may be chosen from C unlimited number of times. Note: All numbers (including target) w...
分类:其他好文   时间:2014-05-21 15:21:28    阅读次数:292
SQL 检索所有存储过程中是否包含某字符
--将text替换成你要查找的内容 select name from sysobjects o, syscomments s where o.id = s.id and text like '%text%' and o.xtype = 'P' --将text替换成你要查找的内容 SELECT ROUTINE_NAME, ROUTINE_DEFINITION FROM INFO...
分类:数据库   时间:2014-05-21 14:50:04    阅读次数:373
jdbc查询sybase参数过多问题
公司的数据库一直是sybase,用起来也挺好的,最新客户现场出现一个问题,数据无法传输了,看日志非常简单,一下就定位到了原因。 很简单,参数超过了2000个,因为这个功能是根据主表的主键查询子表,方法用的是where 主表id in (?,?,?,?……)方式,参数问号最多是是2000个,不过这就奇怪了,直接使用sql查询sybase,5000个参数也没问题,看来是jdbc驱动的问题了。...
分类:数据库   时间:2014-05-21 13:39:29    阅读次数:463
LeetCode: Trapping Rain Water [041]
【题目】 Given n non-negative integers representing an elevation map where the width of each bar is 1, compute how much water it is able to trap after raining. For example, Given [0,1,0,2,1,0,1,3,2,1,2,1], return 6. The above elevation map is represente...
分类:移动开发   时间:2014-05-21 06:44:38    阅读次数:359
How to Restore File Error 3219 on Microsoft SQL Servers
File error 3219 occurs on Microsoft SQL servers where you are attempting to improperly restore a database with the "Restore Files and Filegroups" comm...
分类:数据库   时间:2014-05-21 03:36:02    阅读次数:427
© 2014 mamicode.com 版权所有  联系我们:gaon5@hotmail.com
迷上了代码!