In SQLite, the CURRENT_DATE function is used to retrieve the current date. The CURRENT_DATE function in SQLite returns the current date in the format ‘YYYY-MM-DD’. This function is particularly useful when you need to record or query data based on the current date. It is important to note that the CURRENT_DATE function does not take any arguments; it simply returns the current date based on the system’s clock.
Here’s a basic example of using CURRENT_DATE in a SQL query:
-- Create a table to store information with a date column CREATE TABLE tasks ( task_id INTEGER PRIMARY KEY, task_name TEXT, task_due_date DATE ); -- Insert a new task with the current date INSERT INTO tasks (task_name, task_due_date) VALUES ('Complete project', CURRENT_DATE); -- Retrieve tasks that are due today or overdue SELECT * FROM tasks WHERE task_due_date <= CURRENT_DATE;
In this example, a table named tasks is created with columns for task ID, task name, and task due date. The INSERT statement adds a new task to the table with the current date in the task_due_date column. The SELECT statement then retrieves tasks that are due today or overdue by comparing the task_due_date with CURRENT_DATE.
It's worth mentioning that SQLite also provides other date and time functions, allowing you to manipulate and query data based on date and time values. These functions include DATE, TIME, DATETIME, and others, offering flexibility in handling different aspects of date and time within your database operations.
In summary, CURRENT_DATE in SQLite is a useful function for obtaining the current date within SQL statements. It simplifies the process of working with dates and can be employed in various scenarios, such as data retrieval, insertion, and comparison operations within the SQLite database.