try this
-- populate table user_parameters with user_id values (unique)from
user_details
INSERT user_parameters
SELECT user_id, null, null FROM user_details
-- Update remaining columnsd
UPDATE user_parameters
SET
param_name = t1.user_name
param_value = t1.user_address
FROM
user_parameters t2 JOIN user_details t1
ON t2.user_id = t1.user_id;
Dr Mich Talebzadeh
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On 23 April 2016 at 07:04, Deepak Khandelwal <dkhandelwal....@gmail.com>
wrote:
> Hi All,
>
> I am new to Hive and I am trying to create a query for below aituation.
> Would appreciate if someone could guide on same. Thans a lot in advance.
>
> I have two TABLES shown below
>
> TABLE1 (USER_dETAILS)
> **USER_ID** | **USER_NAME** | **USER_ADDRESS**
> ------------+------------------+----------------
> 1 USER1 ADDRESS111
> 2 USER2 ADDRESS222
>
> TABLE2 (USER_PARAMETERS)
> **USER_ID** | **PARAM_NAME** | **PARAM_VALUE**
> ------------+------------------+------------------
> 1 USER_NAME USER1
> 1 USER_ADDRESS ADDRESS111
> 2 USER_NAME USER2
> 2 USER_ADDRESS ADDRESS222
>
> I need to insert data in table2(USER_PARAMETERS) FROM table1(USER_DETAILS)
> in the format shown above. I can do this using UNION ALL but I want to
> avoid it as there are like 10 such columns that i need to split like above.
>
> Can someone suggest a efficient hive query so that i can achieve the
> results shown in table 2 from data in table 1 (Hive query to split one row
> of data into multiple rows like such that Row 1 will have column1 Name,
> column1 Value and Row 2 will have column 2 Name and column 2 value...).
>
> Thanks a lot
> Deepak
>
>
