You may want to extract data for use in other software products. Because the other software products may not understand NULL values, there are two ways to specify how NULL values appear when using the OUTPUT statement from Interactive SQL:
Both options allow you to output a specific value in place of a NULL value. By specifying how NULL values are output, you have greater compatibility with other software products.
To specify a NULL value output (Interactive SQL)
Execute a SET OPTION statement that changes the value of the output_nulls option. The following example changes the value that appears for NULL values to (unknown):
SET OPTION output_nulls = '(unknown)';
For more information about setting Interactive SQL options, see SET OPTION statement.
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