Oracle

Flyway conditional db migration

非 Y 不嫁゛ 提交于 2021-02-10 04:15:21
问题 I'm trying to use flyway, but I have a scenario that does not know how to resolve: When I apply the STANDARD scripts, I have to run V1.0__create_table_TAB1.sql When I apply the scripts to customer1, the TAB1 table is a view, and so I have to run V1.0__create_view_TAB1_to_schema1.sql. Practically: └── sql ├── sql_common │ ├── V0.0 __.... sql │ └── V1.0__create_table_TAB1.sql ├── sql_customer1 │ └── V1.0__create_view_TAB1_to_schema1.sql └── sql_customer2 └── V1.0__create_view_TAB1_to_schema2

Flyway conditional db migration

ぃ、小莉子 提交于 2021-02-10 04:15:13
问题 I'm trying to use flyway, but I have a scenario that does not know how to resolve: When I apply the STANDARD scripts, I have to run V1.0__create_table_TAB1.sql When I apply the scripts to customer1, the TAB1 table is a view, and so I have to run V1.0__create_view_TAB1_to_schema1.sql. Practically: └── sql ├── sql_common │ ├── V0.0 __.... sql │ └── V1.0__create_table_TAB1.sql ├── sql_customer1 │ └── V1.0__create_view_TAB1_to_schema1.sql └── sql_customer2 └── V1.0__create_view_TAB1_to_schema2

Flyway conditional db migration

独自空忆成欢 提交于 2021-02-10 04:12:57
问题 I'm trying to use flyway, but I have a scenario that does not know how to resolve: When I apply the STANDARD scripts, I have to run V1.0__create_table_TAB1.sql When I apply the scripts to customer1, the TAB1 table is a view, and so I have to run V1.0__create_view_TAB1_to_schema1.sql. Practically: └── sql ├── sql_common │ ├── V0.0 __.... sql │ └── V1.0__create_table_TAB1.sql ├── sql_customer1 │ └── V1.0__create_view_TAB1_to_schema1.sql └── sql_customer2 └── V1.0__create_view_TAB1_to_schema2

oracle instantclient_11_2 配置文件tnsnames.ora

£可爱£侵袭症+ 提交于 2021-02-10 03:55:01
文件所在位置(不同版本位置可能不同): oracle\product\10.2.0\client_1\NETWORK\ADMIN\tnsnames.ora WDDB = (DESCRIPTION = (ADDRESS_LIST = (ADDRESS = (PROTOCOL = TCP)(HOST = xxxx )(PORT = 1521 )) ) (CONNECT_DATA = (SERVICE_NAME = wddb) ) ) BXDB = (DESCRIPTION = (ADDRESS = (PROTOCOL = TCP)(HOST = xxxx )(PORT = 1521 )) (CONNECT_DATA = (SERVER = DEDICATED) (SERVICE_NAME = bxdb) ) ) 使用工具连接数据库: 打开PLSQL Developer 用户名:xxx 口令:xxx 数据库:WDDB 连接身份为:Normal 在项目中配置数据库,文件名:application.properties (使用数据源形式不需要在此配置),如下: * #oracle database settings * jdbc.url=jdbc:log4jdbc:oracle:thin:@172.16.49.243:1521:wddb * jdbc.username=fx_dev *

Second highest value from Oracle DB's table [duplicate]

走远了吗. 提交于 2021-02-10 03:07:20
问题 This question already has answers here : How to find the employee with the second highest salary? (5 answers) Closed last month . According to the tables: USERS (user_name, email, balance) How can I create a query that return the second highest user balance in the most efficient way ? I successes to get this record (but not by the efficient way) with the query: SELECT * FROM (SELECT us.*, ROWNUM row_num FROM (SELECT u.* FROM users u ORDER BY u.BALANCE DESC) us WHERE ROWNUM < 3) WHERE row_num

Second highest value from Oracle DB's table [duplicate]

£可爱£侵袭症+ 提交于 2021-02-10 03:06:39
问题 This question already has answers here : How to find the employee with the second highest salary? (5 answers) Closed last month . According to the tables: USERS (user_name, email, balance) How can I create a query that return the second highest user balance in the most efficient way ? I successes to get this record (but not by the efficient way) with the query: SELECT * FROM (SELECT us.*, ROWNUM row_num FROM (SELECT u.* FROM users u ORDER BY u.BALANCE DESC) us WHERE ROWNUM < 3) WHERE row_num

Second highest value from Oracle DB's table [duplicate]

て烟熏妆下的殇ゞ 提交于 2021-02-10 03:06:22
问题 This question already has answers here : How to find the employee with the second highest salary? (5 answers) Closed last month . According to the tables: USERS (user_name, email, balance) How can I create a query that return the second highest user balance in the most efficient way ? I successes to get this record (but not by the efficient way) with the query: SELECT * FROM (SELECT us.*, ROWNUM row_num FROM (SELECT u.* FROM users u ORDER BY u.BALANCE DESC) us WHERE ROWNUM < 3) WHERE row_num

oracle客户端instantclient如何配置

懵懂的女人 提交于 2021-02-10 02:28:08
下载下来的instantclient-basic-nt-11.2.0.4.0.zip文件解压缩D:\Program Files\instantclient_11_2(可以选择自己的目录) (1) 增加TNS_ADMIN环境变量 TNS_ADMIN=D:\Program Files\instantclient_11_2 (2) 把TNS_ADMIN加入到Path变量 (3) 把tnsnames.ora文件放到TNS_ADMIN目录(D:\Program Files\instantclient_11_2)中。 tnsnames.ora 将instantclient解压到磁盘,然后手工增加系统 环境变量 path=C:\instantclient-basic-nt-11.2.0.2.0 ORACLE_HOME=C:\instantclient-basic-nt-11.2.0.2.0 TNS_ADMIN=C:\instantclient-basic-nt-11.2.0.2.0 NLS_LANG=AMERICAN_AMERICA.ZHS16GBK # tnsnames.ora Network Configuration File: F:\app\Administrator\product\11.2.0\dbhome_1\NETWORK\ADMIN\tnsnames.ora #

Java技术体系------JDK、 JRE、 Java ME 、 Java SE 、Java EE

左心房为你撑大大i 提交于 2021-02-09 20:33:42
以下内容并非原创,来自于深入理解Java虚拟机一书: 从广义上讲,Clojure、JRuby、Groovy等运行与Java虚拟机上的语言机器相关的程序都属于Java技术体系中的一员,但是仅从传统意义上来看,Sun官方所定义的Java技术体系包括: Java程序设计语言 JavaAPI类库 运行于各个硬件平台上的虚拟机 Class文件格式 商业机构和开源社区的第三方Java类库 JDK:   包括Java程序设计语言、JavaAPI类库、运行于各个硬件平台上的虚拟机,JDK是用于支持Java程序 开发 的最小环境; JRE: Java API类库中的Java SE API子集和Java虚拟机这两部分统称为JRE,JRE是支持Java程序 运行 的标准环境。 JRE与JDK的区别: JRE 顾名思义是java运行时环境,包含了java虚拟机,java基础类库。是使用java语言编写的程序运行所需要的软件环境, 是提供给想运行java程序的用户使用 的。 JDK 顾名思义是java开发工具包,是程序员使用java语言编写java程序所需的开发工具包, 是提供给程序员使用的 。JDK包含了JRE,同时还包含了编译java源码的编译器javac,还包含了很多java程序调试和分析的工具:jconsole,jvisualvm等工具软件,还包含了java程序编写所需的文档和demo例子程序。

Quartz.Net使用教程

血红的双手。 提交于 2021-02-09 12:22:16
在项目的开发过程中,难免会遇见后需要后台处理的任务,例如定时发送邮件通知、后台处理耗时的数据处理等,这个时候你就需要 Quartz.Net 了。 Quartz.Net 是纯净的,它是一个.Net程序集,是非常流行的Java作业调度系统Quartz的C#实现。 Quartz.Net 一款功能齐全的任务调度系统,从小型应用到大型企业级系统都能适用。功能齐全体现在触发器的多样性上面,即支持简单的定时器,也支持Cron表达式;即能执行重复的作业任务,也支持指定例外的日历;任务也可以是多样性的,只要继承IJob接口即可。 对于小型应用, Quartz.Net 可以集成到你的系统中,对于企业级系统,它提供了Routing支持,提供了Group来组织和管理任务,此外还有持久化、插件功能、负载均衡和故障迁移等满足不同应用场景的需要。 Hello Quartz.Net 开始使用一个框架,和学习一门开发语言一样,最好是从Hello World程序开始。 首先创建一个示例程序,然后添加Quartz.Net的引用。 Install-Package Quartz -Version 3.0.7 我们使用的是当前最新版本3.0.7进行演示。添加引用以后,来创建一个Job类 HelloQuartzJob 。 public class HelloQuartzJob : IJob { public Task