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How to create table in sqliite3

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by vinitha@openweaver.com dot icon Updated: Oct 27, 2023

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SQLite is a popular and self-contained RDBMS. It is often used for embedded database applications. It is not a client-server database engine like MySQL or PostgreSQL. 


It is a file-based database engine that we can integrate into the application. SQLite database supports a variety of table types and configurations. 


Here are the different types of new database tables you can create with SQLite:  

  • Basic Tables, Temporary Tables,  
  • Virtual Tables, Composite Tables, Materialized Views  


Creating an SQLite table involves several steps. Here are the steps to create a new table:  

  • Connect to the Database  
  • Define Table Structure: You can use the CREATE TABLE SQL command  
  • Insert Data into the Table  
  • Retrieve Data from the Table  
  • Update and Delete Data  
  • Close the Database Connection  


When creating an SQLite table, you have a range of features to customize its structure. Here are some of the key features and options available:  

  • Table Name, Table Aliases, Table Inheritance, Table definition  
  • Column Definitions: Column Name, SQLite Data types  
  • Primary Key, Foreign Keys,  
  • SQL Constraints, constraint definition, Indexes  


Creating SQLite tables helps ensure that your application performs well and manages data. Here are some tips for optimizing your SQLite tables:  

  • Choose the Right Data Type  
  • Define a Primary Key  
  • Consider Composite Indexes  
  • Regularly Analyze and Optimize Indexes  
  • Use Indexes Wisely  


In conclusion, understanding SQLite tables and design principles is necessary for creating applications. It boosts the application's performance and ensures data accuracy, scalability, and maintainability.  

Fig: Preview of the output that you will get on running this code from your IDE

Code

In this solution we are using Sqlite library

Questions about create table in sqlite3 of python

PythondotLines of Code : 18dotLicense : Strong Copyleft (CC BY-SA 4.0)

Dependent Libraries : 
c.execute("SELECT * FROM sqlite_master WHERE type='table'").fetchall()

[(u'table', u'new', u'new', 2, u'CREATE TABLE new(ID INT NOT NULL)')]

import sqlite3
conn = sqlite3.connect('raman.db')
c = conn.cursor()
c.execute("CREATE table new(ID INT NOT NULL)")
print c.execute("SELECT * FROM sqlite_master WHERE type='table'").fetchall()  #check table info new
c.execute("CREATE table Raman(ATOMIC NUMBER INT, SYMBOL TEXT, ROW INT , COLUMN INT)")
c.execute("INSERT INTO Raman VALUES(1,'H',1,'1')")
conn.commit()
print c.execute("select * from Raman").fetchall() #get data from table Raman
conn.close()

[(u'table', u'new', u'new', 2, u'CREATE TABLE new(ID INT NOT NULL)')]
[(1, u'H', 1, 1)]

Instructions

Follow the steps carefully to get the output easily.


  1. Download and Install the PyCharm Community Edition on your computer.
  2. Open the terminal and install the required libraries with the following commands.
  3. Create a new Python file on your IDE.
  4. Copy the snippet using the 'copy' button and paste it into your python file.
  5. Run the current file to generate the output.


I hope you found this useful.


I found this code snippet by searching for ' How to create table in sqliite3 ' in Kandi. You can try any such use case!

Environment tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. PyCharm Community Edition 2023.1
  2. The solution is created in Python 3.11.1 Version
  3. Sqlite3 library 2.31.0 version



Using this solution, we can able to create table in sqlite3 with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to create table in sqlite3.

Dependency library

PyTablesby PyTables

Python doticonstar image 1178 doticonVersion:v3.8.0doticon
License: Permissive (BSD-3-Clause)

A Python package to manage extremely large amounts of data

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            PyTablesby PyTables

            Python doticon star image 1178 doticonVersion:v3.8.0doticon License: Permissive (BSD-3-Clause)

            A Python package to manage extremely large amounts of data
            Support
              Quality
                Security
                  License
                    Reuse

                      You can search for any dependent library on kandi like ' PyTables '

                      FAQ:   

                      1. What is the CREATE TABLE command in SQLite, and what does it do?  

                      The CREATE TABLE command in SQLite helps create a new table in an SQLite database. It defines the table structure by specifying the names and data types within the table.   

                      Here's the basic syntax of the CREATE TABLE command:  

                      CREATE TABLE table_name (column1 datatype, column2 datatype, column3 datatype, ... );  

                        

                      2. Why should I use a PRIMARY KEY or indexed value for my primary key field?  

                      It's recommended to use a primary key in the relational database systems. It helps to identify each record in a table uniquely. When choosing a primary key, you have two common options:   

                      • using a single-column primary key   
                      • using a composite primary key  

                        

                      3. What is an integer primary key asc, and how does it work?  

                      In SQLite, "INTEGER PRIMARY KEY ASC" is a common way to define a primary key for a table. Let's break down what each part of this declaration means:  

                      • INTEGER: This specifies the data type of the primary key column.  
                      • PRIMARY KEY: It indicates that the column you're defining is a primary key.  
                      • ASC: This is an optional keyword specifying the primary key's sorting order.  

                        

                      4. How do INSERT statements interact with UNIQUE constraints? What will happen when inserting data into an existing table in SQLite?  

                      When you use these, the data insertion can interact with UNIQUE constraints. It can happen in the following ways:  

                      • Successful Insertion  
                      • Violation of UNIQUE Constraints  
                      • Conflict Resolution - ON CONFLICT ABORT, IGNORE, REPLACE, or ROLLBACK  

                        

                      5. What different table declarations can we use in SQLite when creating a table?  

                      When creating a table, you can use various table declarations. It helps define the structure of the table. Here are some of the different table declarations and their purposes:  

                      • Column Definitions  
                      • Primary Key Constraint  
                      • UNIQUE Constraint  
                      • NOT NULL Constraint  
                      • CHECK Constraint, DEFAULT Constraint  
                      • AUTOINCREMENT, Collation  

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