I’m trying to delete any inactive rows after a limit of 1000 rows, and I’ve tried this: but it’s deleting everything from the table. EDIT: I’ve tried this, but it’s deleting all inactive orders: I want to keep the first 1000 inactive orders and delete the remaining older inactive…
Tag: android
How can I filter composite ManyToMany POJOs by children POJO’s attributes?
I have two Room Entities like this ones: …and a junction table for Many To Many relationship like this one: …and some composite class for obtaining some kind of “composite POJO”: …then, I have this kind of “composite DAO”: The point of the question is… The one t…
Reading and displaying values from SQLite and storing them inside a List
I am trying to read and display all the data from my db but I get the following error. Also the recyclerview is not displaying any data. How I read from the DB. How I add the elements into the db. How I try to display the data saved in a list. Class where I save all my data. ERROR:
Android/sqlite – ContentResolver query with user input
Currently, I’m using this method to query all photos user’s phone has: I wanted to allow the user to filter the query by file names, so I added selection & selectionArgs part. (getSelectionArgs() returns “” if there is no user input. It returns the input if there is.) This method h…
Android Room Query returning null
I am trying to get the values from a DB via Room but it always returns null. It should retrieve the data from DB BalancesCat. Any help? Thanks! This is the DAO Repository ViewModel and the Fragment where I want to retrieve the data Answer This isn’t your problem, but I have to mention, your repository&#…
How to receive not duplicative rows using Room?
I have two related entities: Station Connector When I insert data, I fill up both entites and it seems kinda okay, but when I’m trying to receive stations with particular types of connectors it duplicates rows. For example, I have an object And if I want to filter stations only by one connector type I r…
How can the same function be provided without using the row_number() function in sqlite?
The query below is working perfectly well if the user’s phone supports sqlite version 3.25.0 or higher. Otherwise, as you can guess, the query doesn’t work. How can I transform the code, without using the row_number () function? The database’s ER diagram: The expected result: Answer I would …
How to stop class database file getting created multiple times when using flutter_moor?
Whenever I am adding a new row to my database in my flutter app, I am getting this error : WARNING (moor): It looks like you’ve created the database classAppDatabase multiple times. When these two databases use the same QueryExecutor, race conditions will ocur and might corrupt the database. I read diff…
Select sqlite android
I have a query with a condition but it is returning an empty result even though I have the data that matches these conditions. I am a beginner, so I’m not sure if this query is correct. public Cursor …
Is using LIMIT in SQLite gives the data or rows in “FIRST IN FIRST OUT” basis?
I am using SQLite in my Ionic project, I am saving my Log Files in SQLite server, for this I want to limit the .db file with only last 2000 data values in FIRST IN FIRST OUT basis, does using LIMIT 2000 will give me the last 2000 values stored or the first 2000 values I have stored (which is