I just thought I'd post this tip to warn of a problem I came across when using an sqLite data base created and populated using sqLite Studio. The steps I used were.
Created an sqLite db using sqLite Studio on Win 10 pc
Set the DB to use the Write Ahead Log journal method (WAL File)...
The other day I wrote a query for sqLite to return the standard deviation of a column.
SELECT STD(colFred), AVG(colFred) FROM tblFredsTable ...
Imagine my disappointment when I found that sqLite doesn't provide standard deviation or variance aggregate functions. All of the other...
Today I have a fairly specific question: Are the JdbcSQL and SQL libraries compatible or not?
I have been developing an app (android) using JdbcSQL, as recommended, and connecting to a MYSQL server without any problem. However, for a few days now, I have wanted to add to my...
Part 1 is here.
At some stage we explored how one can distribute / embed SQLite database on their BANano app. These databases are mainly for read only access purposes where one just wants to display data.
Here we explore part 2 of the tutorial, however now made into a library...
For a while I have been exploring backend connectivity using BANano for BANanoSQL, SQLite, MSSQL and MySQL. The purpose of this lib is for a one place for all your connectivity with these backends.
This library as a couple of class utilities for connecting to BANAnoSQL, SQLite, MSSQL and...
lmB4XComboBox is a b4x library (https://www.b4x.com/android/forum/threads/100383/#content).
It works with B4A, B4J and B4i.
It is a modified version of the Erel's original B4XComboBox and allows you to store in it a value for each text item.
Not rarely (mainly handling DB data) you need a...
I created a Xcustom list view as shown in this thread,
to get data i used SQLite database.
To load the layout I used the following code as shown in the above thread,
I have been trying out SQLite and ran into something odd. I have just implemented a Delete function and it appears to work fine. It no longer shows up in specific queries or if I list all records in the appropriate table. However, if I take the database file to a PC and examine it, the rows are...
I get this error on a service in my application. The error occours sometimes on a SQL EndTransaction:
The error is rare, it appens one time in a hour. The transaction is on a sub called by a client socket.
What it can depend on?
Here the logs...
Well, I intend to rewrite a small POS system for B4J.
It will be used by small restaurants, so I don't expect a lot of competing readings and recordings, or a lot of data, and it will be used on a local network.
My intention is to use SQLITE, to facilitate the installation, but I never used this...
Hopefully this is a quick question. I'm trying to do some array processing and sorting and think it would be easier to do this within a database environment, but don't want to have to go back to the mySql server for this temporary stuff. I think an in memory SQLite connection would work just...
Long working apps have DB that grows and grows. It must be controlled, when records qty is very big, and most old data should be deleted:
Sub Clean_SQL(tables() As String) As Boolean
'Starter.SQL is already open
Dim TotalRecordsLimit As Int = 20000 'set yourself according to the...
Hello every pro,
I use the code below to insert datas in a table which name is pvpt (for geography)
synt="INSERT INTO pvpt(pays,villes,lat,ns,lon,ew,abrv,ajout) VALUES " & _
"('" & _
txtPays.Text & sep & _
txtSaisieNelleVille.Text & sep & _...
In the code below, when I extract datas from a table, I find a special behaviour decribed here:
The log renders the good answers for two datas LAT and LON, but if I try to put them in two EditTexts, the result is 0.
Do I miss something ?
Who tried to develop it ? I think, it's very interesting task.
For ex., we make:
1) choosing the subject, area for the app - say, fishing (or electrotechnics...)...
2) Develop the database structure
3) invent the interface template for db filling by the expert
4) invent the interface...
I am trying to do a join on 2 different SQLite tables. Here is my SQL Statement:
Select * FROM tbl_items WHERE tbl_categories.cl_reference = 'cat01' AND tbl_categories.cl_song = tbl_items.cl_song ORDER BY cl_last_access_time ASC
I keep getting the following error...
I wish to use an sqlite db on a tablet's external sd card.
The tablet is running Android Build version 6 with API Level (19 KiKat).
I tried ExternalStorage.zip. I had to edit the manifest to a minimum of 19 to get it to install.
It now installs and runs, but when I push the Pick Folder...
This wish is for enabling jSQL's locking for alternative SQLite JDBC drivers. Various methods for enabling this could be (this is a repeat found in my post here: https://www.b4x.com/android/forum/threads/sqlite-jdbc-driver-with-encryption-and-authentication-support.110565/#post-690205):
I have an app that stores an image in a SQLite BLOB and happily retrieves and displays it in a form. However I need to push that up to a PHP Webserver and store it in the corresponding MySQL BLOB field.
Do I have to retrieve the BLOB, store it locally as a file then Post it to the Server for...
1. Add the database that you want to be...