--创建数据库create database test;--将数据库日志备份模式设置为全日志ALTER DATABASE test SET RECOVERY FULL ; --查询.确认数据库日志备份模式SELECT name, recovery_model, recovery_model_desc FROM sys.databases WHERE name = 'test' ; ----Changing recovery model to Bulk-logged--ALTER DATABASE
MySQL REPLACE语句介绍 MySQL的REPLACE语句是一个MySQL扩展于SQL标准的语句. 官方定义:REPLACE works exactly like INSERT, except that if an old row in the table has the same value as a new row for a PRIMARY KEY or a UNIQUE index, the old row is deleted before the new row is ins
本文会使用一个案例,就mybatis的一些基础语法进行讲解.案例中使用到的数据库表和对象如下: article表:这个表存放的是文章的基础信息 -- ---------------------------- -- Table structure for article -- ---------------------------- DROP TABLE IF EXISTS `article`; CREATE TABLE `article` ( `article_id` ) NOT NULL AU
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
首先,以超级管理员的身份登录oracle sqlplus sys/bjsxt as sysdba --然后,解除对scott用户的锁 alter user scott account unlock; --那么这个用户名就能使用了. --(默认全局数据库名orcl) 1.select ename, sal * 12 from emp; --计算年薪 2.select 2*3 from dual; --计算一个比较纯的数据用dual表 3.se
复制表结构 CREATE TABLE 新表 SELECT * FROM 旧表 where 1=2 复制表结构和数据CREATE TABLE 新表 SELECT * FROM 旧表 查询重复数据: select user_name,count(*) as count from user_table group by user_name having count>1; 比较日期,转换成时间戳UNIX_TIMESTAMP() select * from Table where UNIX_TIMESTA