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关于参数net_buffer_length How MySQL Uses Memory
http://dev.mysql.com/doc/refman/5.6/en/memory-use.htmlThe following list indicates some of the ways that the mysqld server uses memory. Where applicab...
分类:数据库   时间:2015-04-02 22:12:18    阅读次数:237
Mysql: Table 'name' is specified twice, both as a target for 'UPDATE' and as a separate source for data
mysql在执行删除、更新的时候,可能会出现这样的错误,比如你写了类似下面的sql:UPDATE MYTABLE SET COL=COL+1 WHERE ID IN (SELECT ID FROM MYTABLE WHERE OTHERCOL=0)orDELETE FROM MYTABLE WHER...
分类:数据库   时间:2015-04-02 18:37:29    阅读次数:345
dede站怎么在首页调用单页的内容?
{dede:sql sql="SELECT aid,typeid,body FROM `dede_addonarticle` where typeid=2 ORDER BY `aid` DESC LIMIT 0 , 1"}[field:body /]{/dede:sql}说 明:其中typeid=2...
分类:其他好文   时间:2015-04-02 18:04:12    阅读次数:128
ORACLE学习记录
1.查询主键(P),外键(R)select cu.*,au.constraint_type from user_cons_columns cu, user_constraints au where cu.constraint_name = au.constraint_name and cu.cons...
分类:数据库   时间:2015-04-02 18:03:27    阅读次数:173
【leetcode】Path Sum2
Given a binary tree and a sum, find all root-to-leaf paths where each path's sum equals the given sum.For example:Given the below binary tree andsum =...
分类:其他好文   时间:2015-04-02 15:01:01    阅读次数:112
SQL 查询排名是第三位的人
MYSQL可以使用如下的用法:SELECT id FROM partner_broker_account_record ORDER BY id LIMIT 2, 1在limit为2的基础上加1,sql server是:select top 1 * from tbl_score where tbl_s...
分类:数据库   时间:2015-04-02 14:38:28    阅读次数:173
sql: postgreSQL sql script
SELECT * from pg_class c,pg_attribute a,pg_type t where c.relname='BookKindList' and a.attnum>0 and a.attrelid=c.oid and a.atttypid=t.oidSELECT a.attn...
分类:数据库   时间:2015-04-02 13:17:08    阅读次数:300
SQL2008数据库优化常用脚本
--查询某个数据库的连接数select count(*) from Master.dbo.SysProcesses where dbid=db_id()--前10名其他等待类型SELECT TOP 10 * from sys.dm_os_wait_statsORDER BY wait_time_ms...
分类:数据库   时间:2015-04-02 13:01:57    阅读次数:226
leetcode || 61、Rotate List
problem: Given a list, rotate the list to the right by k places, where k is non-negative. For example: Given 1->2->3->4->5->NULL and k = 2, return 4->5->1->2->3->NULL. Hide Tags  L...
分类:其他好文   时间:2015-04-02 10:31:03    阅读次数:117
swift基础语法(控制流、可选类型、switch、循环、开闭空间)
1 // Playground - noun: a place where people can play 2 3 import Cocoa 4 5 //控制流 6 7 //Swift的条件语句包括if和switch,循环语句包含for-in、for、while和do-while,循环/判断...
分类:编程语言   时间:2015-04-02 10:19:44    阅读次数:295
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