How to apply ranking in teradata?

@domenico 

In Teradata, you can apply ranking using the RANK() function. This function assigns a rank to each row within a partition of a result set. To apply ranking in Teradata, you can follow these steps:

1. Write a SELECT statement that retrieves the columns you want to rank.
2. Use the RANK() function in the SELECT statement to assign a rank to each row based on the specified ordering.
3. Partition the results by using the PARTITION BY clause if you want to rank within groups of rows.
4. Order the results using the ORDER BY clause to determine the ranking order.
5. Execute the query to see the ranking results.

Here is an example of applying ranking in Teradata:

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SELECT 
   column1,
   column2,
   RANK() OVER (PARTITION BY column3 ORDER BY column4) AS ranking
FROM 
   table_name;

In this example, the RANK() function is used to assign a rank to each row based on the values in column4 within each partition of column3. The results will include the original columns along with the ranking for each row.