SQLite is a software library that implements a self-contained, serverless, zero-configuration, transactional SQL database engine.
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votes
1answer
87 views
Unit of Work and repositories in MVVM / Windows 10 app
I’m currently aiming to make my first app for the Universal Windows Platform (UWP) / windows 10. It’s a small app but should follow some best practices patterns (although I’m considering it as a first ...
7
votes
1answer
142 views
Optimizing SQLite SELECT Performance
I need to read Databases which contain 44-50 Tables, with around 5 Million entries in Total (~ 100k entries per Table).
The Data consists of Positional Tracking Data in Sports (Players,Refs and the ...
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votes
0answers
27 views
SQLite Select Performance
I need to read Databases which contain 44-50 Tables, with around 5 Million entries in Total (~ 100k entries per Table).
The Data consists of Positional Tracking Data in Sports (Players,Refs and the ...
0
votes
1answer
54 views
Storing results of a game in a sqlite table
This is a section of code in a program I have created to store and review the results of a game based upon the "class_number" the user gives. This section is very bulky and I was wondering how I could ...
7
votes
1answer
188 views
Generic asynchronous SQLite search builder
I am writing a database manager that reads and writes to a local SQLite database on a mobile device. It works pretty well for the most part, but read access is somewhat slow - it takes about 2-5 ...
4
votes
1answer
44 views
php sqlite query with mulitple replaces
I have a column where, pretty much, each entry has numbers (specifically #1-4) and spaces (' '). I wanted to make a query that could avoid having to know these numbers and spaces. This is my working ...
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vote
0answers
27 views
C++ generic SqLite 3 table to vector
I just coded method for loading data from SqLite 3 database, it is working and in test run it was successfully checked for no memory leaks:
...
1
vote
1answer
32 views
Queries using multiple tables and ANDs: should that be avoided?
This is a part of a project I am working on. I need advice and criticism regarding the data base design and general approach to querying the data. I am not at all experienced with relational data ...
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votes
0answers
44 views
SQLite app for local storage
When I make an app using SQLite for local storage I've settled into a nice routine; create a contract class and a extended BaseColumns class to hold column names ...
1
vote
1answer
108 views
Key Value Store for Android on top of Sqlite3
I wrote this simple key-value interface on top of Sqlite3 to use in my Android app. I am using this to persist Java objects as strings converted using Gson.
The public API has 3 methods.
...
2
votes
1answer
130 views
Basic CRUD application for Product, Category & Location with SQLite
I improved the code from my previous question.
At this moment, the 3 entities have not yet a connection with each other. They should only be available for CRUD actions in a SQLite database.
I would ...
4
votes
2answers
92 views
ProductManager: a basic CRUD for products with SQLite
I would like to have a review of this basic CRUD application so I can improve and learn from your experience. The code can be found here.
Design pattern/coding principles improvement that could be ...
3
votes
2answers
53 views
Advanced CSV-to-SQLite converter
I just wrote an advanced CSV parser that translates CSV to SQL(SQLite Compatible) statements, which are then inserted into the database. It translates variable names in the CSV to values defined in ...
0
votes
1answer
488 views
WPF filling a DataGrid
I'm creating a WPF application with a DataGrid. I'd like some advice on the code I've written:
...
5
votes
2answers
111 views
Terrain height map generator
I wrote a Perl script that implements the algorithm described in this
article to generate terrain height maps. The idea is to raise a random hill \$i\$ of size \$r_i\$ centered at point \$(x_i, ...
1
vote
1answer
100 views
Inserting data into an SQLite database
I've execute this code in Android for inserting 100+ rows in SQLite database.
My current approach takes more time to initialize the database.
...
4
votes
2answers
56 views
SQLite UPDATEs for persons and a subclass
I am using Java with SQLite and I am wondering if I am in the right track onto writing good code i.e. more or less reusable:
SQL scheme:
...
5
votes
1answer
586 views
Nested SQLite transactions in jQuery
I'm using Cordova with jQuery and jQuery Mobile to develop a hybrid app. In this app I need to save data that I get from a server.
The data is a ...
6
votes
1answer
325 views
Multiple Choice Guessing Game
I've built an app for members of an organization I'm in--the app shows the picture of a member with four multiple choice buttons, and the user then tries to guess the member's name. Pretty simple, ...
4
votes
2answers
73 views
Program to provide CRUD operations for a Boxers(Fighter) table in a database
I have been through a few SQLite tutorials and wrote this code on my own to reinforce the principles. The tutorials I went through varied widely in a few areas so this is what I came up with as a ...
1
vote
1answer
28 views
Writing an SQL SELECT statement
I'd like to Select columns from Table 1 with a Row Filter, Select columns from Table 2 and join.
This works but it's a bit verbose. I was wondering if there is a cleaner way to write this.
...
2
votes
1answer
50 views
Searching for log entries in SQLite that involve a particular IP subnet
This reads a huge database (SQLite) and extract any IP address similar to ip_base:
...
3
votes
1answer
105 views
Data cleansing and formatting script
This is a script that creates a base dataframe from a sqlite database, adds data to it (also from SQLite), cleanse it and formats it all to an Excel file. I feel like it is incredibly verbose and my ...
2
votes
0answers
96 views
Structured use of Android SQLite transactions
I got tired of following Android-SQLite's transaction idiom, briefly documented here.
It requires too much boilerplate code, IMHO, especially when you add the obligatory null checks. So I came up ...
3
votes
1answer
131 views
Fetching, processing, and storing Mixpanel analytics data to SQLite
I'm a self-taught Python programmer and I never really learned the fundamentals of programming, so I want to see how to improve upon this script and make it adhere to best practices.
The script has ...
2
votes
1answer
73 views
Downloading, decompressing and inserting data into an SQLite database
I have implemented a Service, which executes three operations, in the following order:
Downloading a compressed (.zip) CSV file
Decompress the CSV file
Reading the CSV file and inserting the data ...
0
votes
0answers
3k views
Python TKinter data entry window GUI for SQLITE3 table
I would like to offer for review a simple tkinter GUI window in Python 3 to be used for data entry into an SQLite database table. As a noob, this is my first attempt at OOP and my first experience ...
1
vote
1answer
48 views
Empty product model
I don't think I am using MVC concept in Ruby on Rails properly. Model accesses db, controller works on logic and view displays information/data. But in my below code, My Model code is empty. Can ...
0
votes
2answers
79 views
Transferring a CSV file to a database while merging some columns
Say I am given a csv file that I want to import into an sqlite3 database. The first two columns in the csv file contain unique, important information while the rest of the columns are really a list ...
2
votes
1answer
648 views
Restore SQLite database backup
I have an application that provides the user the ability to backup the local SQLite database to another location. I then provide the ability to restore the backup database and overwrite the current ...
1
vote
2answers
110 views
Binning and calculating a huge range of data
I have a code that I'm fairly certain does what I want. Bear with me as I explain what I'm doing:
Imagine that there is 10 houses, where there can be one to an infinite number of persons. Each of ...
5
votes
2answers
908 views
Is there a better SQLite update / insert pattern than this?
I've got a function which updates an existing record or inserts a new one, but it looks very clunky to me.
...
1
vote
1answer
74 views
Optimizing the performance of a nested for loop over millions of messages from SQLite Query - v2
I've posted and gotten help to optimize my code before here and here. Now I have implemented the following changes, after very helpful advice:
I have implemented a Dictionary instead of using list ...
1
vote
1answer
133 views
Find the highest frequency of messages inside a time slot of 24 hours
I have a very large number (millions) of messages, each labeled with the unixtime it was sent in a SQLite database. Each message has its own userid, for the user that have sent it. I want to know ...
5
votes
2answers
1k views
Create SQLite backups
I have this script for creating SQLite backups, and I was wondering whether you'd have any suggestions on how to improve this. I was thinking that maybe it should create the backup ...
3
votes
3answers
3k views
Inserting persons in file into SQLite
I've just started working with SQLite in C# to test various features of an application. In building my first SQLite example I wanted to insert a large .csv into a table (Person) with two columns, A ...
3
votes
1answer
300 views
Flask form validation technique
This is currently the code that I'm using to validate and check for errors in a flask app, where the form fields are coming from a /registration html page:
...
2
votes
1answer
307 views
Adding items to a database from a dialog
I have a spinner in my activity that upon selection of one of it's options needs to handle the addition of a new object to my ...
2
votes
1answer
63 views
Getting recent stations
I made a database for my Android app using SQLite and it works fine. However, as I understood, SQLite calls shouldn't be made on UI thread.
Is the below okay or not?
...
5
votes
3answers
536 views
Schema design for user profile management
Is this a good design? I would like to create a view on user table to get a list of users based on filtered conditions. Please suggest ways of improving this schema design.
A view example that I ...
3
votes
0answers
660 views
Real-time bitcoin data feed and storage using websocket framework
I'm trying to create data feed script for real time bitcoin data for OkCoin exchange using their websocket API (documentation) and a database manager for storing.
There are two channels I am ...
7
votes
1answer
490 views
Android “Search” Activity and corresponding XML
Below is an Android Activity and corresponding XML layout. The function of the class is to search an ...
3
votes
1answer
973 views
Creating a fast Android dictionary (word counts)
This is a follow-up of my question here:
I am currently working on an application for various statistics. One task is to analyse a good amount of sentences for their word counts.
The specifications ...
8
votes
2answers
109 views
FizzBuzz in SQLite 2
This query performs a FizzBuzz in SQLite 2.8.17 without creating any tables or sprocs.
First attempt:
...
6
votes
1answer
225 views
Using SQL to reorder items in a list view - is this efficient?
I'm writing an application for work that requires me to process a list of transactions. The list is small (5 records at the most) and I'm required to display that data in an android ...
7
votes
1answer
196 views
BananaQuery - Android one-line query
I created this library just for fun. Since I was a bit tired to write 10 lines of code to execute a simple select query in Android, I created a way make it simple.
It's not so advanced and some ...
5
votes
1answer
773 views
Persistent key value store for Python using SQLite3
This is a module to implement a key value store in Python using SQLite3. Originally written to allow sharing of configuration among multiple threads that are already sharing a SQLite3 database, I have ...
5
votes
2answers
827 views
Benchmarking our LAMP servers with this php script
I've written a small script to benchmark our LAMP hosted servers that assess the performance based on three factors:
Disk I/O
Database I/O (mysql)
Database I/O (sqlite)
The logic is as follows:
...
6
votes
2answers
145 views
3
votes
1answer
218 views
Seeding a file with fake records - doing concurrent updates
I need to seed a database with user data.
When trying to write records to a file using sqlite3 with node, I tried writing the logic in a naive manner, without any error checks - but it was failing ...
