How to handle null timestamps using coalesce in teradata?

@herminia_bruen 

To handle null timestamps using COALESCE in Teradata, you can use the following syntax:

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SELECT COALESCE(timestamp_column, current_timestamp) AS new_timestamp
FROM your_table;

In this syntax, timestamp_column is the column in your table that may contain null timestamps. COALESCE is a function that returns the first non-null value in the list of arguments. In this case, if timestamp_column is null, it will be replaced with the current timestamp.

This will ensure that you do not have null values in your timestamp column and instead have them replaced with the current timestamp.