To delete data from a table in SQLite, you can use the DELETE statement.
For example, if you wanted to delete a row from the “Customers” table with the CustomerID of ‘123’, you could use the following SQL statement:
DELETE FROM Customers WHERE CustomerID = ‘123’;
You can update data in a SQLite table using the UPDATE statement.
For example, if you wanted to update the name of a customer in the “customers” table, you could execute the following SQL statement:
UPDATE customers
SET name = ‘John Smith’
WHERE customer_id = 123;
To insert data into a table in SQLite, you use the INSERT INTO statement.
For example, if you have a table called “customers” with the columns “name”, “address”, and “phone_number”, you can insert a new row into the table with the following statement:
INSERT INTO customers (name, address, phone_number) VALUES (‘John Doe’, ‘123 Main Street’, ‘555-123-4567’);
To create a table in SQLite, you use the CREATE TABLE statement.
For example, to create a table named ‘users’ with three columns: id, username, and email:
CREATE TABLE users (
id INTEGER PRIMARY KEY,
username TEXT NOT NULL,
email TEXT NOT NULL
);
Creating a database in SQLite is a simple process. All you need to do is open up the command line interface (CLI) and type in the following command:
sqlite3
For example, if you wanted to create a database named “my_database”, you would enter the following command:
sqlite3 my_database
This will create a new database file with the name “my_database.db” in the current directory. You can then use the “.tables” command to see the list of tables in the database.
SQLite is a lightweight, open source, serverless relational database management system (RDBMS) that is used for data storage and retrieval.
Advantages of using SQLite include:
1. Easy to Setup and Use: SQLite is a self-contained, serverless, zero-configuration, and transactional SQL database engine. It does not require a separate server process or system to operate.
2. Compact and Lightweight: SQLite is very small in size and requires minimal memory and disk space. The entire database is stored in a single file, making it easy to manage and back up.
3. High Performance: SQLite is capable of handling large amounts of data with ease. It is very fast and can handle thousands of queries per second.
4. Cross-Platform Support: SQLite is available for multiple platforms, including Windows, Linux, Mac OS X, and Android.
5. Open Source: SQLite is free and open source software, released under the BSD-3 Clause license.
Example:
Let’s say you are developing a mobile application and you need to store some data. You could use SQLite to create a database and store the data in it. Your application can then use SQL queries to access and manipulate the data stored in the database. This makes it easy to store, retrieve, and update data in the database.
SQLite is a relational database management system (RDBMS) contained in a C library that works with a single disk file. It is an embedded SQL database engine without a separate server process. It is a self-contained, serverless, zero-configuration, and transactional SQL database engine.
Example:
Let’s say we have a database of users and their associated information. We can use SQLite to store the data in a table.
CREATE TABLE users (
id INTEGER PRIMARY KEY,
name TEXT,
email TEXT,
age INTEGER
);
Vaibhav Kothia