Eval() display custom value if null

Question

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Answer 1

I will suggest to do it in SQL only:

using ISNULL(expression, value_if_expression_is_null) or

COALESCE(expression, expression2, expression3)

example :

SELECT
  Name, DOB,
  (CASE WHEN Address1 IS NULL THEN 'NA' ELSE Address1 END) AS Address1,
  (CASE WHEN Address2 IS NULL THEN 'NA' ELSE Address2 END) AS Address2,
  ...
FROM Users

or

SELECT 
  Name, DOB, Address1, 
  coalesce(Address2,'NA'), coalesce(City,'NA'), 
  coalesce(State,'NA'), coalesce(Zip,'NA')
FROM Users