This page provides an overview of various SQL clauses, allowing users to explore and understand different SQL functionalities.
SQL provides a flexible framework for data manipulation. SQL Clauses are fundamental building blocks that enable various operations, such as data retrieval, insertion, updating, and deletion.
Here's a list of common SQL clauses:
Let's dive deeper into one specific clause, SELECT. This clause lets you retrieve data from a database.
Used to retrieve data from a database table. You specify the columns you want to retrieve.
Example: SELECT * FROM customers;
Used to filter rows based on a condition. It's crucial for data selection.
Example: SELECT * FROM products WHERE price > 100;
Sorts the results of a query. The order determines the presentation of the data.
Example: SELECT * FROM products ORDER BY price ASC;
Adds a new row to a table.
Example: INSERT INTO products (name, price) VALUES ('Widget', 25);
Modifies existing rows in a table.
Example: UPDATE products SET price = 30 WHERE id = 1;
Removes a row from a table.
Example: DELETE FROM products WHERE id = 1;