Description: The ‘OVER’ clause in SQL is a fundamental tool used in window functions to define how data should be grouped in a result set. This clause allows calculations to be performed on a set of related rows without needing to aggregate the results into a single row, providing greater flexibility in data analysis. By using ‘OVER’, developers can specify partitions and orderings within the data, enabling them to apply aggregation functions like SUM, AVG, or ROW_NUMBER more effectively. This is particularly useful in situations where detailed data analysis is required, such as in reporting or performance analysis. The ‘OVER’ clause can be combined with the ‘PARTITION BY’ clause to divide the result set into specific groups, and with ‘ORDER BY’ to define the order in which window functions are applied. In summary, ‘OVER’ is a powerful feature that enhances SQL’s ability to perform complex and detailed analyses on data sets.
