database-migration

问题 I want to move my SQL Server 2005 database to Oracle. How can I do that? What are the step I want to follow? Are there any tools for this? 回答1: UPDATE : Sorry for the wrong information. Find something useful here and a tool here. 来源： https://stackoverflow.com/questions/3763693/move-sql-server-2005-to-oracle

问题 I am trying to add a new column to my existing table in database, i am specifying new field into class and running Add-Migration command but everytime it is creating a migration class for whole table with CreateTable method instead of AddColumn. Below is the class and generated migration class codes. public class UserSetup { public int Id { get; set; } public string Name { get; set; } public bool Age{ get; set; } // New Field Added } But for new field it is creating migration class for full

问题 I am trying to add reset function to codeigniter's migration. Below is my code: class Migration extends Backend_Controller { public function __construct() { parent::__construct(); $this->load->library('migration'); } public function index() { //... } public function reset() { $this->migration->version(1); $this->db->truncate('ci_sessions'); $this->migration->current(); } } It returns error: Fatal error: Cannot redeclare class Migration_Create_geo_data in D:\web_projects\vProject\framework

问题 I'm sorry for such a complex subject. My problem is. I tried to move my Drupal 7 site from one server to another. I uploaded a fresh install to my new site. I backed up my old database and imported to my new site. I uploaded settings.php file to my new site. When i entered to my new site's module part, All the 3rd party modules i installed in my old site, exist in my new site without any loss :) But when i check the folders /sites/all/modules /sites/default /modules I couldn't find any file

问题 I've run rake db:migrate and all of my migrations ran. However, when I try to run rake db:test:prepare I get the error: You have 1 pending migrations: 20130724211328 CreateGalleries Run `rake db:migrate` to update your database then try again. Then running rake db:migrate again gives the error: PG::Error: ERROR: relation "galleries" already exists... But in the console I can create and manipulate the Gallery model exactly as shown in the CreateGalleries migration. The table is not being

问题 For a low budget project I have to run IIS Asp Mvc with MySql. Migrating an existing project runs fine but if I create a LINQ query with Take & Skip it fails. First Test (OK) var post = _db.Posts.FirstOrDefaultAsync(a => a.id == 1234); Second Test (OK) var post = _db.Posts.Include(a => a.Comments); var result = await post.Select(a => new TRDPostViewModel { Created = a.Created, Body = a.Body, Comments = a.Comments.Select(d => new TRDCommentViewModel { Body = d.Body, Id = d.Id, }).Where(m => m

问题 I very new to production sailsjs environment, I need a way to add table changes which I make in my sailsjs Models in Dev to be applied to Sailsjs Production Models. Does anyone dealt with this before ? Can someone guide me through it please ? It would be really helpful to have a step by step guide, All i need is to have the Model attributes created in the Production database tables. 回答1: Well you can always jump in here: https://gitter.im/balderdashy/sails and you might find some help. 来源：

问题 I have to migrate my database from MySql to Derby. However, I am facing a problem, that it is not possible just to create sql dump and import in JavaDB. Is there an easy way, a tool or something that I can use? or should I do everything by hand? Danke 回答1: One good way, is to use DdlUtils. with this, you can export a database schema from one database and create it in another. This is the MySQL page. 来源： https://stackoverflow.com/questions/25065426/easy-way-migrate-data-from-mysql-to-derby

问题 I mean is it good practice to allow application to modify the db? Or should database migration be done externally to the application code base? New to this, so any input will be appreciated. We are using java and gradle to build the application. 回答1: Flyway author here. Yes! At the end of the day, there are two important forces at play: Your schema is really tightly coupled to your application code : Your application expects certain tables and columns to be present so it can read & write to

问题 When I try to do Update-Database, I get this error: The navigation property 'SenderId' is not a declared property on type 'Conversation'. Verify that it has not been explicitly excluded from the model and that it is a valid navigation property. Edit I believe problem is in mapping relations between Conversation and User, because Conversation and User are connected with two one to many relationships i.e. Conversation has two foreign keys pointing to User Here is how User and Conversation are