hadoop - Conditional GROUP BY clause in Hive QL -

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I am trying to parameter the group by clause in a hive QL script. 

  SELECT COUNT (*) AS sales, country, state, city testdb.data WHERE PRICE & gt; 5 If the group (true, (country, state, city), (country, state))

how can such a query be obtained?

I have tried to use the CASE statement in GROUP BY and its functions Want to verify. If you can write your position in a case statement then this query can work. 

  SELECT * to testdb.data WHERE value & gt; 5 group from the country, the case of the state & lt; Cond & gt; WHEN & lt; Val & gt; Then City END;

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