SQL doesn't have explicit 'for' or 'while' loops like programming languages. Instead, it uses `cursors` and `WHILE` statements to achieve looping behavior. These methods are less common than other SQL operations, but can be useful in specific scenarios.
SQL, unlike procedural languages like Python or Java, doesn't have built-in looping constructs like `for` or `while` loops. This is because SQL is primarily designed for set-based operations, where you work with entire datasets at once. However, there are ways to achieve iterative behavior. One common approach is using cursors, which allow you to process rows from a result set one at a time. Another method involves using `WHILE` statements in conjunction with conditions and updates. These methods are often less efficient than set-based operations and are typically used in specific situations where set-based solutions aren't feasible.
While not a primary feature, understanding cursors and `WHILE` loops is important for handling specific tasks that require processing data row by row, such as complex data transformations or updates based on intricate conditions.