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                ```sql -- int size(Map<K.V>) 返回 map 中鍵值對個數 hive> select size(map('k1','v1','k2','v2')); 2 -- int size(Array<T>) 返回數組的元素數量 hive> select size(array(1,2,3,4,5)); 5 -- array<K> map_keys(Map<K.V>) 返回 map 中的所有 key hive> select map_keys(map('k1','v1','k2','v2')); ["k1","k2"] -- array<V> map_values(Map<K.V>) 返回 map 中的所有 value hive> select map_values(map('k1','v1','k2','v2')); ["v1","v2"] -- boolean array_contains(Array<T>, value) -- 如該數組 Array<T>包含 value 返回 true。,否則返回 false hive> select array_contains(array(1,2,99), 99); true -- array sort_array(Array<T>) 對數組進行排序 hive> select sort_array(array(2, 1, 3, 9)); [1,2,3,9] ```
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