sqlite

Can't update records in my Rails database migrations

For example I have the following migration class AddStatusField < ActiveRecord::Migration def self.up add_column :tasks, :status, :string Task.update_all "status='complete'", "completed = 't'" remove_column :tasks, :completed end end When I run this (using rake db:migrate) I get the following message == AddStatusFiel...

SQLite queries failing in Android

If I use the query to return some basic columns in table, that is OK. But if I use group by, order by , sum(column) or choose specified columns, the query fails to run. I use Cursor query method or rawquery, both the same. If I run the following queries in adb shell, it works without problems. select * from table (work) select fielda,...

Android SQLite database

I have application working with SQLite DB(table with two rows) I need to recieve _ID row of the selected listview Item, but don't know how to do it. So, main activity public class Main extends ListActivity { private RecipesData recipes; private static int[] TO={0,R.id.row_text_id}; private static String[] FROM={ _ID, CATEGORY_NAME, }; /...

Yet another Android SQLite database question

I want to create two tables in DB, how do I do it using SQLiteOpenHelper descendant and overriding onCreate metod? Will the below code be ok? Seems I'm doing it wrong. public void onCreate(SQLiteDatabase db){ db.execSQL("CREATE TABLE "+CATEGORY_TABLE+" ("+_ID+" INTEGER PRIMARY KEY AUTOINCREMENT, "+ CATEGORY_NAME+" TE...

Delete all rows that aren't in another table in SQLite

Hi all, I have two tables (A and B). I want to delete all the rows in Table B where B.1 isn't in Table A.2. So I wrote this formula in sqlite: DELETE FROM B WHERE 1 IN (SELECT * FROM B LEFT JOIN A ON A.1=B.2 WHERE A.1 IS NULL) But this returns this error: only a single result allowed for a SELECT that is part of ...

Save Dataset to SQLite format file

I have a dataset with multiple tables. I can obviously do a Dataset.WriteToXML("Somefile.xml") What if I want to export the dataset to a SQLite formatted file. In other words I want to be able to write (i.e. serialize) the contents of the dataset to a SQLite file. Dataset.SerializeToSQLite("Sqliteformatted.bin") Similarly I want to ...

Android SQLiteDatabase Null Pointer Exception

Hi! I've just started developing for Android. So far it's been surprisingly smooth sailing, but now I've run into some problems implementing an SQLite database. My code is based on Google's Notepad example (which runs perfectly well), but I keep getting Null Pointer Exceptions thrown at me and it seems to be related to the getWritableDa...

A Database Tool to check changes happened overnight and upload to MasterDB

HI I have 5 different database and a Master DB with same Schema .I am looking for a tool which can check any changes( new row insertion ) has happened since my last update and Sync with my Master DB . Is there any tool available for this ...

Help Building SQL query

Hi all. I have following 2 tables Channels: Id int PK Title varchar SubChannels: ChannelId int SubchannelId int When I receive data from service I'm trying to persist it to SQL. I receive a few Channel instance, so I store it in Channels table, after that I'm trying to persist every subchannel (every channel contains list of subchann...

sqlite and php: wait for selection results

Hi, I'm currently working on a project that uses PHP and sqlite for real-time data tracing. When my php script, say script A, querys sqlite for a selection operation, it returns immediately even with no result. What I'm expecting is that script A will wait until the data is stored in sqlite, for example, by script B. I've tried to used i...

"if, then, else" in SQLite

Without using custom functions, is it possible in SQLite to do the following. I have two tables, which are linked via common id numbers. In the second table, there are two variables. What I would like to do is be able to return a list of results, consisting of: the row id, and NULL if all instances of those two variables (and there may b...

EntLib Caching and SQLite

Hi there I'm trying to get the Microsoft EntLib Caching Block (5.0) working with a SQLite Database and are facing some problems: When I configured the Caching Block for the MS SQL Database I had to run a sql script which created the db and some stored procedures. But I can not find any information on how to create those procedures and ...

Android input dialog.

I have class for showing custom dialog public class Add_Category_Dialog { public String inputed_value; private Context context; public Add_Category_Dialog(Context context){ this.context=context; } public void showDialog(){ AlertDialog.Builder alert = new AlertDialog.Builder(context); alert.setTitle("Title"); ...

How to tell if sqlite database file is valid or not

In the code below, pathToNonDatabase is the path to a simple text file, not a real sqlite database. I was hoping for sqlite3_open to detect that, but it doesn't (db is not NULL, and result is SQLITE_OK). So, how to detect that a file is not a valid sqlite database? sqlite3 *db = NULL; int result = sqlite3_open(pathToNonDatabase, &db);...

Using Sqlite Data Provider from EntLibContrib and DAAB EntLib 5.0

Hello, is it possible to use SQLite Data Provider from EntLibContrib 4.1 in with EntLib 5.0? I'm not familiar with EntLib 4.x, I just started using EntLib 5.0 and don't know whether differences between them are severe or not to use data provider from EntLib 4.1 for EntLib 5.0. ...

Convert MySQL to SQlite

Is it possible to convert from MySQL to SQLite with a free tool on windows? ...

To close or not to close?

... that's the question. In last days I'v got very often many error messages because of database leak in my application, so now I open Database, get query results from it and close DB again. But I use also a cursoradapter for my autocompletetextview. Should I also do it on that way there: open DB, get cursor, close DB?! I mean, I hav...

How do I include a SQLite DLL in my C++ project?

I'm trying to add SQLite to my project via a DLL. I downloaded SQLiteDLL-3 from the download page, extracted its contents (a DLL and a .h file), and ran lib.exe on it to produce a .lib file. I then set the directory containing the .lib and the .dll files to be an Additional Library Directory, in the project settings, under Linker >> Gen...

Core data fails to open store: "Error validating url for store"

I've been working on an app for quite a while and suddenly started to hit this error when the app tries to open a Core Data store. I hadn't made any changes to my data model or the data access code for over a month, so I don't think it can be anything that I'm doing wrong as far as interacting with Core Data. (Meaning, the URLs are ok,...

Keep first and remove dupliciate rows only using sqlite

Maybe i should do this in C# but i have more then one row with linkId X. I would like to remove it but i am unsure how. In code i could just use a foreach from 0 to n and remove any found rows with a greater (or !=) id but thats in code. Is there a less difficult way of doing it using sqlite? ...