database-update

updating related tables in cake

由 巧了我就是萌 提交于 2019-12-25 06:58:41
问题 I have this: $this->request->data['Person']['person_id'] = $this->Session->read('insertedPersonID'); $savedPerson = $this->Person->saveAll($this->request->data, array('validate'=>'first')); which updates the selected person row fine however its related tables like PersonColor and PersonParts are not updating, instead inserting new rows. I thought cake automatically updates the related tables as well as long as the id of the main table which is the foreign key for the other two tables are

Updating SQLite database android

由 时间秒杀一切 提交于 2019-12-23 02:16:35
问题 Okay, I made a database and i realised that each time i change something in the database i have to uninstall then reinstall the Application :( which is very frustrating... here is my code for my data base hopefully you can help me ! i dont know whats wrong with my code: import android.content.ContentValues; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class Cook_tab_snacks_data extends SQLiteOpenHelper {

How to manage desktop file database versions?

由 不羁岁月 提交于 2019-12-23 01:37:07
问题 How to manage database changes while upgrading desktop applications? We have a SQLite database for one of our desktop apps. The uninstaller keeps the database to be used by the next install. But what if the next install has an updated version? How to keep the data but upgrade the tables? We use .NET and Linq2sql 回答1: Here is how I do this: In my code I define the version of the database #define DB_VERSION 2 This version number is incremented every time I make a change to the code that 'breaks

Database deploy with updates

由 做~自己de王妃 提交于 2019-12-11 06:36:49
问题 Does anybody know how to do smart database update in realtime. E.g. I have a site with a great database. Suddenly I've made some code changes and database structure and data changes. Is there any standard plan to do it with deploy script or any deploy soft? In realtime without stopping the site? E.g. switch between two clone databases or smth like that. How do experienced people do that? Site is written in php, database is MySql. Thanx! 回答1: Have you looked at DBdeploy? There's a good article

Atomic update with joins in SQL

由 时光总嘲笑我的痴心妄想 提交于 2019-12-11 06:15:25
问题 I've got a table that tracks "checked out" objects, but objects live in various other tables. The goal is to allow users to check out objects that match their criteria such that a given object can only be checked out once (i.e. no two users should be able to check out the same object). In some cases, a single object may span multiple tables, requiring the use of joins to check for all the user's criteria (in case that matters). Here's a very simple example query (hopefully you can infer the

Android What is the easist way Upgrade Database for existing DB

由 坚强是说给别人听的谎言 提交于 2019-12-10 12:25:09
问题 I hava app, and it has database, after published. I have add some tables to the my database. How can I easily update new database with old database which was already installed phone before when a customer update this application on market. Here is my Code. What should I write in onUpgrade ? public class DataBaseHelper extends SQLiteOpenHelper { //destination path (location) of our database on device private static String DB_PATH = ""; private static String DB_NAME ="sorubankasi.sqlite";//

Recover Updated Data - SQL Server 2005 [closed]

由 我只是一个虾纸丫 提交于 2019-12-08 03:18:42
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 6 years ago . I have an issue that, while using sql server 2005 i have executed update query without where clause (by mistake) and all the original values of the column get lost. How can I get old values?? Any suggestion/tips/solution is welcome and will be highly appreciated. 回答1: Hi AngelIII, SQL server keeps log for every

Android: onUpgrade not calling at database upgrade

由 爷，独闯天下 提交于 2019-12-07 06:27:28
问题 I am developing the second version of my application. In which I am facing a problem. In my application the database is in the assets folder. Now I want to update my database from the assets folder in the second version. I tried the code to upgrade as : // Data Base Version. private static final int DATABASE_VERSION = 2; I changed the version from 1 to 2. //Constructor public DataBaseHelperClass(Context myContext) { super(myContext, DATABASE_NAME, null ,DATABASE_VERSION); this.context =

Updating SQLite database android

由 陌路散爱 提交于 2019-12-06 17:32:26
Okay, I made a database and i realised that each time i change something in the database i have to uninstall then reinstall the Application :( which is very frustrating... here is my code for my data base hopefully you can help me ! i dont know whats wrong with my code: import android.content.ContentValues; import android.content.Context; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; public class Cook_tab_snacks_data extends SQLiteOpenHelper { public static final String DATABASE_NAME = "Snacks"; public Cook_tab_snacks_data(Context context) {

How to manage desktop file database versions?

由 蹲街弑〆低调 提交于 2019-12-06 16:29:32
How to manage database changes while upgrading desktop applications? We have a SQLite database for one of our desktop apps. The uninstaller keeps the database to be used by the next install. But what if the next install has an updated version? How to keep the data but upgrade the tables? We use .NET and Linq2sql Here is how I do this: In my code I define the version of the database #define DB_VERSION 2 This version number is incremented every time I make a change to the code that 'breaks' the database ( makes an incompatible change to the schema or the semantics of the db contents ) When the
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