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mysql 表主键类型由int 改为bigint
需求:由于业务的需要,tmp_employees的emp_no主键字段类型为int已经不能满足业务的需求,此时需要将该表主键字段类型由int更改为bigint使用工具:pt-online-schema-change./pt-online-schema-change--user=root--password=root456--recursion-method="processlist"--alter="mo..
分类:数据库   时间:2016-03-01 19:21:29    阅读次数:664
pt-online-schema-change工作原理
./pt-online-schema-change--user=root--password=root456--recursion-method="processlist"--chunk-size=50000--alter="modifycolumnemp_nobigintnotnullauto_increment"h=192.168.31.64,P=3306,D=employees,t=tmp_employees--execute创建一张和原表结构一样的中间表,命名一..
分类:其他好文   时间:2016-03-01 19:17:21    阅读次数:362
Experimental Educational Round: VolBIT Formulas Blitz K
Description IT City company developing computer games decided to upgrade its way to reward its employees. Now it looks the following way. After a new
分类:其他好文   时间:2016-02-29 18:14:01    阅读次数:212
Experimental Educational Round: VolBIT Formulas Blitz J
Description IT City company developing computer games invented a new way to reward its employees. After a new game release users start buying it activ
分类:其他好文   时间:2016-02-24 22:40:00    阅读次数:261
Experimental Educational Round: VolBIT Formulas Blitz F
Description One company of IT City decided to create a group of innovative developments consisting from 5 to 7 people and hire new employees for it. A
分类:其他好文   时间:2016-02-24 21:09:53    阅读次数:187
null相关函数
1. nvl(expr1,expr2) 如果expr为空则返回expr2 select nvl(e.commission_pct,11) from employees e;--如果奖金为空,则返回11 2. nvl2(expr1,expr2,expr3) 如果expr1不为空返回expr2,否则返回
分类:其他好文   时间:2016-02-15 22:36:00    阅读次数:162
leetcode 181. Employees Earning More Than Their Managers
题目链接: https://leetcode.com/problems/employees-earning-more-than-their-managers/ The Employee table holds all employees including their managers. Every
分类:其他好文   时间:2016-02-15 18:30:12    阅读次数:228
C#中使用Oracle存储过程返回结果集
问题:在MSSQLServer中定义的存储过程可以直接返回一个数据集,如:create procedure sp_getAllEmployeesasSELECT * FROM [NORTHWND].[dbo].[Employees]在Oracle数据库中这样定义是错误的,怎么解决?办法:Oracle...
分类:数据库   时间:2016-01-27 09:17:51    阅读次数:235
knockout+MVC+webapi+sqlserver完成增删查改
快过年了,公司的事情较少,想着开始学习点新东西。这段时间一个项目用到了mvc和webapi,然后一直对knockout比较感兴趣,就想着用这个框架做一个小实例。数据库采用的是sqlserver。话不多说,开始进行项目的步骤。 第一步:数据库的表创建。创建一个Employees员工表,具体字...
分类:数据库   时间:2016-01-25 16:38:15    阅读次数:263
JS 弹窗“是否删除”
var r = confirm("是否确认删除!");if (r == true) {location.href = "/Employees/Delete/" + id;}else { return; }'">删除Response.Write("");
分类:Web程序   时间:2016-01-18 12:08:18    阅读次数:272
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