Array Cleanup

Real-world arrays often contain duplicates or arrive in unpredictable order. SQL provides functions to normalize arrays for consistent processing and analysis. Deduplication Sorting & Set Operations Sorted arrays enable consistent display and comparison. Note that string sorting is alphabetical, so sizes like S, M, L, XL will not sort in the expected order without custom logic. ARRAY_UNION/INTERSECT Combine arrays from multiple sources using set operations: With array operations and cleanup techniques covered, you are ready to explore the map data structure and its specialized functions.