CREATE SEQUENCE <sequence-name> AS data-type 默认 As Integer START WITH <numeric-constant> INCREMENT BY <numeric-constant> 默认 INCREMENT BY 1 MINVALUE <numeric-constant> | NO MINVALUE 默认 NO MINVALUE MAXVALUE <num
1.把主键定义为自动增长标识符类型 在mysql中,如果把表的主键设为auto_increment类型,数据库就会自动为主键赋值.例如: create table customers(id int auto_increment primary key not null, name varchar(15)); insert into customers(name) values("name1"),("name2"); select id from customers;
Testing the CATCHER Time Limit: 1000MS Memory Limit: 30000K Total Submissions: 16131 Accepted: 5924 Description A military contractor for the Department of Defense has just completed a series of preliminary tests for a new defensive missile calle
Max Sum Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 65536/32768 K (Java/Others)Total Submission(s): 237978 Accepted Submission(s): 56166 Problem Description Given a sequence a[1],a[2],a[3]......a[n], your job is to calculate the max su
转自:http://www.cnblogs.com/WangPB/archive/2010/07/13/1776766.html 在开始讲解Oracle序列使用方法之前,先加一点关于Oracle client sqlplus的使用,就是如果执行多行语句的话一定要加“/”才能表示结束,并执行!本篇文章的主题是通过创建Oracle序列和触发器实现表的主键自增. 1.首先创建序列,Oracle序列的语法格式为:CREATE SEQUENCE 序列名[INCREMENT BY n][START WITH
select t.*, t.rowid from tbl_type t order by t.id desc Select SEQ_TBL_TYPE_ID.NextVal From Dual; ; ; Select SEQ_TBL_TYPE_ID.currVal From Dual; DROP SEQUENCE SEQ_TBL_TYPE_ID; CREATE SEQUENCE SEQ_TBL_TYPE_ID; Oracle中创建.修改.删除序列 ORACLE没有象SQL SERVER中一样的自增
1,SQL Server序列创建与使用 BEGIN IF EXISTS (SELECT * FROM sysobjects WHERE name = 'event_seq') DROP SEQUENCE event_seq END CREATE SEQUENCE event_seq MINVALUE 1 MAXVALUE 999999999999999999 START WITH 1 INCREMENT BY 1 CACHE 20; --使用时 GO select next value for