Android development operation database

Android's database is SQLite, and the sql statements used are all interoperable. Let's not talk about it here. Look at the code: static ArrayAdapter adapter; ImageView img; Button add; Button delete; Button updata; Button select; ListView liv; SQLiteDatabase db; ArrayList<User> us ...

Posted on Sun, 10 Nov 2019 14:58:36 -0500 by pesale86

Python operation SQLite/MySQL/LMDB

1. overview 1.1 Preface Recently, when storing font image sets, you need to learn LMDB, take this opportunity to review the use of SQLite and MySQL, and organize here together. 1.2 environment Use win7, Python 3.5.2. 2.SQLite 2.1 preparation SQLite is an embedded database whose database is a file. SQLite3 is built-in in Python 2.5x and a ...

Posted on Wed, 06 Nov 2019 23:44:33 -0500 by Muggin

Implementation of creating db, adding, deleting and modifying DB operation in Sqlite3 with c language

SQLite is a lightweight database, and has been used in many embedded products. It occupies very low resources and is widely used in embedded devices. Now I am ready to learn how to use sqlite3 and write a test demo. Later, it will be used in the project smart home gateway instead of text database (it is very inconvenient to add, delete and chec ...

Posted on Mon, 14 Oct 2019 11:44:44 -0400 by wchris

Android Operates SQLite Database (Preliminary) - Delete Database in Programs

Links to the original text: https://my.oschina.net/qiuzhping/blog/611693 In particular, how Android deletes databases, because SQLite does not provide instructions to drop database XX, ...

Posted on Wed, 02 Oct 2019 22:27:17 -0400 by linuxdoniv

Setup of STUN/TURN server

Catalog STUN/TURN Server Construction Compilation and installation Configuration and use Add user Start server test Boot up Reference resources STUN/TURN Server Construction Compilation and installation Compile and install OpenSSL; sudo apt-get install ...

Posted on Sat, 28 Sep 2019 11:41:36 -0400 by Qlubbie

Use the Python button to analyze your online behavior and see if you are working hard or fishing.

brief introduction Want to see what you've been doing in the last year? See if you are fishing or working hard on the internet? Want to write an annual report summary, but suffer from no data? Now it's coming. This is a Chrome browsing history analyzer that lets you know your browsing history. Of course, it is only suitable for Chrome browsers ...

Posted on Fri, 23 Aug 2019 09:40:40 -0400 by macmatt

Double Moving Average Strategy for Source Code Resolution and Its Underlying Implementation

Articles Catalogue Double Average Line Strategy (Double MA) DoubeMA Source Code Analysis 1. Policy Class Initialization 2. Policy Initialization 3. Policy Start 4. Receiving Tick Data 5. Processing Bar Data 6. Callback of orders and transactions ...

Posted on Mon, 19 Aug 2019 09:27:16 -0400 by sasito

Structural Adjustment of Flask Project

Flask project structuring FlaskDirectory |----FlaskDirectory |----static |----templates |----main.py |----models.py |----view.py |----manage.py Note here: you must create a project name directory under the flask project to store flask project files, otherwise package ...

Posted on Wed, 07 Aug 2019 06:54:54 -0400 by aladin13

djang's database form operation

Thirteen operational summaries will be presented: Query method: < 1 > all (): Query all results <2> filter (** kwargs): It contains objects that match the given filter conditions <3> get (** kwargs): Returns an object that matches the given filter criteria, and returns a result with and without only one. If more tha ...

Posted on Sun, 28 Jul 2019 01:59:02 -0400 by veeraa2003

C interface for SQLite

Introduction to C interface of sqlite sqlite3_open int sqlite3_open ( const char *filename, /* Database filename (UTF-8) */ /* The database will be encoding in UTF-8 and sqlite3_open16 in UTF-16 */ sqlite3 **ppDb /* OUT: SQLite db handle */ /* Database Connection Object */ ): Opens a connection to a sqlite database file a ...

Posted on Thu, 18 Jul 2019 15:02:35 -0400 by drtanz