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oracle 记录被别的用户锁住
找出数据库的serial#,以备杀死:select t2.username,t2.sid,t2.serial#,t2.logon_time from v$locked_object t1,v$session t2 where t1.session_id=t2.sid order by t2.logo...
分类:数据库   时间:2015-06-09 19:38:18    阅读次数:115
PL/SQL Developer自动补全SQL技巧
s = SELECT t.* FROM tw = WHEREb = BETWEEN ANDl = LIKE '%%'o = ORDER BYinsw = IN (SELECT a FROM a WHERE a )sw = SELECT t.* FROM t WHERE tsc* = SELE...
分类:数据库   时间:2015-06-09 19:30:34    阅读次数:257
MySql 统计排名
例子: SET?@ranking=0; select?*,@ranking:=@ranking+1?AS?`ranking`?from?table?ORDER?BY?`members`?DESC; 1. 先给用户变量 @ranking 赋值,mysql中用户变量以@开头,不用事先申明; 2. 然后按照某...
分类:数据库   时间:2015-06-09 17:55:01    阅读次数:165
CodeForces 550A Two Substrings(模拟)
【题目链接】click here~~ 【题目大意】: You are given string s. Your task is to determine if the given string s contains two non-overlapping substrings “AB” and “BA” (the substrings can go in any order). Input...
分类:其他好文   时间:2015-06-09 17:24:38    阅读次数:105
Codeforces550A:Two Substrings
You are given string s. Your task is to determine if the given string s contains two non-overlapping substrings "AB" and "BA" (the substrings can go in any order). Input The only line of...
分类:其他好文   时间:2015-06-09 17:21:51    阅读次数:184
Mysql字符串中有数字的排序问题
此方法是我见过最聪明的写法,不过不知道有没有隐含的bug:参考地址select id, col from tableName order by length(col) asc, col asc这种方法只针对文本统一的情况,如:abc1,abc2,abc3,abc10,abc11如果文本长度不统一如:...
分类:数据库   时间:2015-06-09 15:35:53    阅读次数:168
Leetcode[27]-Remove Element
Given an array and a value, remove all instances of that value in place and return the new length.The order of elements can be changed. It doesn’t matter what you leave beyond the new length.思路:遍历数组,如果...
分类:其他好文   时间:2015-06-09 11:59:43    阅读次数:115
数据表字段属性查询
---查询数据库所有表名 select id,name from sysobjects where xtype='u' order by name ---查询表的所有字段属性 select   *  from   syscolumns   where   id=object_id(N'FMS_PayApply') ---查询表字段名,类型,长度,默认值,是否允许为空 select col...
分类:其他好文   时间:2015-06-09 09:51:03    阅读次数:136
【Spiral Matrix II】cpp
题目:Given an integern, generate a square matrix filled with elements from 1 ton2in spiral order.For example,Givenn=3,You should return the following ma...
分类:其他好文   时间:2015-06-09 08:30:13    阅读次数:106
【Spiral Matrix】cpp
题目:Given a matrix ofmxnelements (mrows,ncolumns), return all elements of the matrix in spiral order.For example,Given the following matrix:[ [ 1, 2, 3...
分类:其他好文   时间:2015-06-09 08:27:01    阅读次数:79
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