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hivehiveqlhadoop2

Hive how to combine multiple records within a group based on condition

i have dataset as following. 

client-Id   Name    HasCar     HasHome
A01          ABC      Y          N
A01          ABC      N          N
B01          EFG      N          N
B01          EFG      N          Y

From here I need to derive a Single row for each customer whether he has car or home. the expected output should look like below

Client-Id    Name    HasCar     HasHome
A01          ABC      Y          N
B01          EFG      N          Y

This needs to be done using a Hive-QL

Solution

  • Use max() aggregation:

    select client-Id,Name, max(HasCar) HasCar,  max(HasHome) HasHome
  from your_table 
 group by client-Id,Name