amazon-redshiftHow do I use the NVL function in Amazon Redshift?
The NVL function in Amazon Redshift is used to replace null values with a specified value. It takes two arguments, the first being the value to be tested for null and the second being the value to be returned if the first argument is null. The syntax is as follows:
For example, if we have a table called
sales with a column
amount that contains the following data:
We can use the following query to replace the
NULL value with
SELECT NVL(amount, 0) AS amount FROM sales;
The output of this query would be:
The parts of the code are:
NVL: The function used to replace null values
amount: The value to be tested for null
0: The value to be returned if
SELECT: The SQL statement used to perform the query
AS: An optional clause used to rename the output column
For more information, please see the following links:
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