hive IF ELSE

Hive does not have a direct IF-ELSE statement like traditional programming languages. Instead, it uses conditional statements like CASE WHEN and IF statements within query expressions to achieve similar functionality.

For example, you can use the CASE WHEN statement in Hive to perform conditional logic. Here's an example:

SELECT column1,
       column2,
       CASE WHEN column1 > 10 THEN 'Greater than 10'
            WHEN column1 < 10 THEN 'Less than 10'
            ELSE 'Equal to 10' END AS result
FROM your_table;

In this example, the CASE WHEN statement evaluates the value of column1 and returns different values based on the condition. If column1 is greater than 10, it returns 'Greater than 10'. If column1 is less than 10, it returns 'Less than 10'. Otherwise, it returns 'Equal to 10'.

You can also use IF statements combined with other Hive functions to achieve conditional logic. Here's an example:

SELECT column1,
       IF(column1 > 10, 'Greater than 10', 'Less than or equal to 10') AS result
FROM your_table;

In this example, the IF statement checks if column1 is greater than 10. If it is, it returns 'Greater than 10'. Otherwise, it returns 'Less than or equal to 10'.

These are some ways you can implement conditional logic in Hive using CASE WHEN and IF statements.