In what cases and for what purposes is the WHERE operator used in SQL queries?

The WHERE operator in SQL is used to filter rows based on a specified condition. It allows selecting only those records that meet certain criteria.

It is used in the following cases:

• Selecting data with specific column values.
• Limiting the selection for update or delete.
• Combining with logical operators (AND, OR) for complex conditions.

Example:

SELECT * FROM employees WHERE department = 'Sales' AND salary > 50000;

This query selects all employees from the sales department with a salary above 50,000.