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...
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数据库 时间:
2015-04-02 22:12:18
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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...
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数据库 时间:
2015-04-02 18:37:29
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{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...
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其他好文 时间:
2015-04-02 18:04:12
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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...
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数据库 时间:
2015-04-02 18:03:27
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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 =...
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其他好文 时间:
2015-04-02 15:01:01
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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...
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数据库 时间:
2015-04-02 14:38:28
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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...
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数据库 时间:
2015-04-02 13:17:08
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--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...
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数据库 时间:
2015-04-02 13:01:57
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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.
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其他好文 时间:
2015-04-02 10:31:03
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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...
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编程语言 时间:
2015-04-02 10:19:44
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