Abstract: With the increasing complexity and diversity of application scenarios in big data environments, database queries are increasingly characterized by hybrid query characteristics, such as multi ...
SUM(CASE WHEN Policy_ID IS NULL THEN 1 ELSE 0 END) AS NULL_Policy_ID, SUM(CASE WHEN Customer_Age IS NULL THEN 1 ELSE 0 END) AS NULL_Age, SUM(CASE WHEN Gender IS NULL THEN 1 ELSE 0 END) AS NULL_Gender, ...
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