python sqlite tutorial

This article mainly introduces a simple tutorial on using SQLite in Python. as an embedded database, SQLite is embedded in Python versions of previous generations. For more information, see SQLite as an embedded database, its data

' , (+), (2, U ' test2 ', U ' 124 '), (3, U ' test3 ', U ' 124 ', 20)] Below, we encapsulate the sqlite operation in Python into a class, as follows:Class Sqlitehelper: def __init__ (self, db): self.db = db try: self.conn = sqlite.connect (db) Self.cur = Self.conn.cursor () except SQLite. Error,e: p

This article mainly introduces a simple Python tutorial for operating SQLite, including examples of connection, table creation, addition, deletion, and repair. For more information, see I. INTRODUCTION to SQLite SQLite is a lightweight database included in the C library. It

SQLite is an embedded database, and its database is a file. Since SQLite itself is written in C and small in size, it is often integrated into a variety of applications, even in iOS and Android apps. Python has built-in SQLite3, so using SQLite in Python does not require an

consumption, delay time and overall simplicity. The entire database (definition, table, index, and data itself) is stored in a single file on the host host. Its simple design is accomplished by locking the entire data file at the start of a transaction. Use Tips 1, download a sqlite from www.sqlite.org, it is an embedded database, no server concept, Windows version is an EXE, put it into a suitable directory, and then put this directory into the sys

located and execute the Python ez_setup.py on the command line The scripts directory will be generated in the Python installation directory, with Easy_install.exe Add the script directory to the environment variable path. 2. Installing the SQLAlchemy module CMD command line, Run command: Easy_install sqlalchemy Specific code shows: For more tutorials, you are welcome t

This article through the example code to introduce you to the Python connection SQLite and simple operation, very good, with reference value, need to refer to the friend Not much nonsense to say, directly to everyone to paste the code, the specific code is as follows: Import sqlite3# Query def load (table): #连接数据库 con = sqlite3.connect ("e:/datebase/sqlitestudio/park.db") # Get cursor cur = con.cu

NULL. 2. Delete table (drop), empty table (TRUNCATE) Copy Code code as follows: C.execute ("drop table Catalog") The above statement deletes the catalog table. In addition, there is no emptying table in the SQLite, using the following alternative: Copy Code code as follows: C.execute ("Delete from Catalog") 3. Inserting (insert) data, changing (uptate) data Python v

SQLite tutorial (1): SQLite database introduction, sqlite Database I. Introduction: SQLite is currently the most popular open-source embedded database. compared with many other embedded storage engines (NoSQL), such as BerkeleyDB and MemBASE,

SQLite tutorial (11): temporary files, sqlite tutorial I. Introduction: Although the SQLite database is composed of a single file, some hidden temporary files exist in the SQLite runtime. These temporary files exist for different

SQLite tutorial (II): C/C ++ interface introduction, sqlite tutorial I. Overview: Five of the C/C ++ interfaces provided by SQLite are core interfaces. In this blog, we will mainly introduce their usage and the core SQLite objects

SQLite tutorial (5): database and transaction, sqlite tutorial I. Attach database: The attach database statement adds another DATABASE file to the current connection. If the file name is ": memory:", we can regard it as a memory DATABASE, and the memory DATABASE cannot be persisted to the disk file. If you operate a ta

SQLite tutorial (9): online backup and sqlite tutorial online backup I. Common backup: The following method is a simple and commonly used SQLite database backup method, as shown in the following steps:1) Use the SQLite API or Shel

SQLite tutorial (4): built-in functions, sqlite tutorial built-in functions 1. Aggregate functions: The aggregate functions supported by SQLite are also supported in many other relational databases. Therefore, here we will just give a brief description of each aggregate func

SQLite tutorial (10): Memory Database and temporary database, sqlite tutorial I. Memory Database: In SQLite, databases are usually stored in disk files. However, in some cases, we can keep the database in the memory. The most common method is to pass ": memory:" To the datab

SQLite tutorial (III): Introduction to data tables and views, sqlite View 1. Create a data table: The syntax rules and usage of this command are basically the same as those of most relational databases. Therefore, we use examples to demonstrate the rules for creating tables in SQLite. However, we will provide additiona

(This article applies to Debian-based Linux, such as Ubuntu, Raspbian, and so on.) ）On Linux, Python's sqlite3 module uses the system's own SQLite engine , but the system comes with a version of SQLite that is too old.Look at the version of the SQLite engine with sqlite3.sqlite_version, and find out that this version was released in June 2012:To upgrade the

Python connects to sqlite and operations, and python connects to sqlite Import sqlite3 # query def load (table): # connect to the database con = sqlite3.connect ("E:/Datebase/SQLiteStudio/Park. db ") # obtain the cursor cur = con. cursor () # query the entire table cur.exe cute ('select * from' + table) lists = ['name

*/Function error (){Return sqlite_error_string ($ this-> errno );}/**** @ Return int*/Function errno (){Return sqlite_last_error ($ this-> conn );}/*** Display the mysql tutorial error message*/Function halt ($ message = '', $ SQL = ''){Exit ("sqlitequery: $ SQLSqliteerror: ". $ this-> error ()."Sqliteerrno: ". $ this-> errno ()."Message: $ message ");} I hope this article will help you design PHP database programs. Examples in this article describ

() {Return Sqlite_last_insert_rowid ($this-Connid);}/**** @return Array only gets the numeric index*/function Fetch_row ($query) {Return Sqlite_fetch_array ($query, sqlite_num);}/***/function Fetch_assoc ($query) {return $this Fetch_array ($query, SQLITE_ASSOC);}/**** @return String*/Function version () {return Sqlite_libversion ();}function Close () {Return Sqlite_close ($this-conn);}/**** @return String*/Function error () {Return sqlite_error_string ($this-errno);}/**** @return int*/function