You already created a database after running your Code-First application the first time, but what about the second time onwards?? Will it create a new database every time you run the application? What about the production environment? How do you alte…

Database Initialization Strategies in Code-First: You already created a database after running your Code-First application the first time, but what about the second time onwards?? Will it create a new database every time you run the application? What…

In This Document Section 1: Common Database Initialization Parameters For All Releases Section 2: Release-Specific Database Initialization Parameters For Oracle 10g Release 2 Section 3: Release-Specific Database Initialization Parameters For Oracle 1…

In This Document Section 1: Common Database Initialization Parameters For All Releases Section 2: Release-Specific Database Initialization Parameters For Oracle 10g Release 2 Section 3: Release-Specific Database Initialization Parameters For Oracle 1…

Database Initialization: We have seen that Code First creates a database automatically in the Simple Code First Examplesection. Here, we will learn how Code first decides the database name and server while initializing a database. The following figur…

Database Initialization 下图是数据库初始化的工作流 EF为数据库初始化准备了多种策略: l  CreateDatabaseIfNotExists:这是默认的初始化策略 l  DropCreateDatabaseAlways:总是创建数据库,不管数据库中是否存在数据,每次应用程序启动时就会重新设置 l  DropCreateDatabaseIfModelChanges:有且仅当领域模型发生改变的时候创建数据库 若要启动测试数据则必须在应用程启动的时候通过Database.S…

APPLIES TO: Oracle Database - Enterprise Edition - Version 9.2.0.1 to 11.2.0.3 [Release 9.2 to 11.2]Information in this document applies to any platform.***Checked for relevance on 24-Jan-2012*** GOAL How to know which parameter is obsolete and/or de…

java的class中的Long类型变量调用默认的 构造函数new后会被初始化为0. 这句话大家可能感觉这么低级的事情还用你说? 我想说的是这个会产生的一个应用场景 和 避免方法 场景:db插入时候primarykey是 Long值的id 那么插入的时候会默认把这个值一并插入的吧!但是 大家知道这不可以! 所以如何避免初始化的时候不用初始化这个值呢? 很简单,既然是构造函数的问题那么就使用构造函数来处理, 例如: Class student{ private Long id; private S…

sparksql 2.和hive2.1.1 由于sparksql中的hive-cli 等包的版本是1.2的需要自己下载,下载替换之后不报错,替换之前做好备份…

Migration in Code-First: Entity framework Code-First had different database initialization strategies prior to EF 4.3 like CreateDatabaseIfNotExists, DropCreateDatabaseIfModelChanges, or DropCreateDatabaseAlways. However, there were some problems wit…