How do you remove duplicate data in Hive?

To remove duplicate data in Hive, you can follow these steps:

1. Create a new table to store the results without duplicate data. For example, if the original table is called original_table, the new table would be named new_table.
2. Insert the deduplicated data into a new table using the INSERT INTO … SELECT statement. Use the DISTINCT keyword in the SELECT clause to remove duplicate rows.
3. Add the unique values from the original table to the new table.
4. This will select non-duplicate rows from the original table and insert them into the new table.
5. If necessary, you can remove the original table using the DROP TABLE statement.
6. Remove the original_table from the database.
7. If you do not want to delete the original table, you can back it up or rename it.
8. Rename the new table with the name of the original table.
9. Change the name of new_table to original_table.
10. By renaming the new table with the name of the original table, you can keep the table name unchanged.

In this way, you can remove duplicate data in Hive while keeping the table name unchanged. Make sure to backup your data before making any modifications.