Question

I am trying to create a score based on the char_length of a field. I am using a fraction of the char_length returned.

 (CASE WHEN (char_length(e.summary)/100) is null THEN +0
  ELSE +(char_length(e.summary)/100) END)

I would like to know how to set a maximum return value. Is there a simple function or do I need to do one more CASE WHEN with if >=10 THEN … ?

Answer 1

Simplify to:

LEAST(COALESCE(length(e.summary)/100, 0), 10)

• Use LEAST() to introduce an upper border as @Mark already mentioned.
• Use COALESCE() to provide a default for NULL values.
• length() does the same as char_length()