调用LIST的Sort的时候会调用IComparer的默认实现,quicksort会调用每个元素的CompareTo的IComparable实现 using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ComparerTest { class Employee : IComparable<Employee> { private int empID; priva…
using System; using System.Collections.Generic; using System.Linq; using System.Text; namespace ComparableTest { class Program { class Employee : IComparable<Employee> { private int empID; public Employee(int empID) { this.empID = empID; } public ov…
HowTo Restore RMAN Disk backups of RAC Database to Single Instance On Another Node (Doc ID 415579.1) APPLIES TO: Oracle Database - Enterprise Edition - Version 9.2.0.1 and laterOracle Database Cloud Schema Service - Version N/A and laterOracle Databa…
创建表格时添加: create table table1(id int auto_increment primary key,...) 创建表格后添加: 删除原有主键: ALTER TABLE `table_name` DROP `id`; alter table table1 add id int auto_increment primary key 自增字段,一定要设置为primary key. 例子 alter table tablename drop column id; ) not n…