sqlite

问题 I'm writing an inventory database program. I'm a novice so I'm sure I have something wrong. def select_item(): #Create a Database or Connect to one conn = sqlite3.connect('inventory.db') #Create Cursor c = conn.cursor() a = id_select.get() c.execute("SELECT * FROM inventory WHERE oid = " + a) records = c.fetchall() for record in records: Item_editor.insert(0, record[0]) Quantity_editor.insert(0, record[1]) Asset_tag_editor.insert(0, record[2]) Notes_editor.insert(0, record[3]) #Entry Fields

问题 I am comparing performance of the two dbs, plus csv - data is 1 million row by 5 column float, bulk insert into sqlite/mongodb/csv, done in python. import csv import sqlite3 import pymongo N, M = 1000000, 5 data = np.random.rand(N, M) docs = [{str(j): data[i, j] for j in range(len(data[i]))} for i in range(N)] writing to csv takes 6.7 seconds: %%time with open('test.csv', 'w', newline='') as file: writer = csv.writer(file, delimiter=',') for i in range(N): writer.writerow(data[i]) writing to

问题 I am comparing performance of the two dbs, plus csv - data is 1 million row by 5 column float, bulk insert into sqlite/mongodb/csv, done in python. import csv import sqlite3 import pymongo N, M = 1000000, 5 data = np.random.rand(N, M) docs = [{str(j): data[i, j] for j in range(len(data[i]))} for i in range(N)] writing to csv takes 6.7 seconds: %%time with open('test.csv', 'w', newline='') as file: writer = csv.writer(file, delimiter=',') for i in range(N): writer.writerow(data[i]) writing to

问题 Show day for ex:- today, tommorow, 28 Dec 2020 etc after comparing date from sqlite db in a list tile with present date. And also delete a particular item from list on app start if the day was yesterday. In present it is showing like 21-11-2020 and if the date has expired also it still continues to show. This is my Code List<Note2> items2 = new List(); DatabaseHelper2 db2 = new DatabaseHelper2(); db2.getAllNotes2().then((notes2) { setState(() { notes2.forEach((note2) { items2.add(Note2

问题 Show day for ex:- today, tommorow, 28 Dec 2020 etc after comparing date from sqlite db in a list tile with present date. And also delete a particular item from list on app start if the day was yesterday. In present it is showing like 21-11-2020 and if the date has expired also it still continues to show. This is my Code List<Note2> items2 = new List(); DatabaseHelper2 db2 = new DatabaseHelper2(); db2.getAllNotes2().then((notes2) { setState(() { notes2.forEach((note2) { items2.add(Note2

问题 I'm going from SQLite to Postgresql. This has made one of my queries not work. It's not clear to me why this query is allowed in SQLite, but not in Postgresql. The query in question is below in the find_recent_by_section_id_list() function. I've tried rewriting the query in multiple ways, but what is confusing me is that this query worked when I was working with SQLite. The setup is Flask, SQLAlchemy, Flask-SQLAlchemy and Postgresql. class SectionStatusModel(db.Model): __tablename__ =

问题 I converted my MySQL database to SQLite one, but now the login system is not working anymore. I'm using DATABASE=sqlite and SESSION_DRIVER=file . What's wrong? When I type my email and password and press Login, the system redirects me at Login page again without any error messages. I tried to change the redirect route after login many times, and only that are unauthenticated routes are working; This is because Auth::user or auth()->user() are Undefined objects . The login is going well,

问题 I converted my MySQL database to SQLite one, but now the login system is not working anymore. I'm using DATABASE=sqlite and SESSION_DRIVER=file . What's wrong? When I type my email and password and press Login, the system redirects me at Login page again without any error messages. I tried to change the redirect route after login many times, and only that are unauthenticated routes are working; This is because Auth::user or auth()->user() are Undefined objects . The login is going well,

问题 On my Xamarin android application i create db path using the "System.Environment.SpecialFolder.Personal". I have an existing sqlite database. Where in the project and with what properties must i include the database to be used in the peronal folder? 回答1: You can use Xamarin.Essentials to access your read-only bundle/asset resource and copy it without have to use native platform code or if you are coding within an Xamarin.Android project, you can directly use Android.Content 's Assets So

问题 I am new at programming and developing apps so go easy on me please. Basically I want to be able to update some text every so often without having to update the entire app. I'm not sure how to go about this. Any feed back would be nice Edit: I should have mentioned what I'm doing. I making an app for my pool, and a feature I want to add will allow people to see how many people are in the pool before they deiced to come. So I would need to constantly change my text in a certain part of my app.