How to treat MAX() of an empty table as 0 instead of NULL

Question

I try to select max value from table

SELECT MAX(cid) FROM itemconfiguration;

However when table itemconfiguration is empty th

Answer 1

Just use Coalesce or NVL to handle NULLs.

The following code will return 0 if MAX(cid) is NULL

SELECT COALESCE(MAX(cid), 0)
FROM   itemconfiguration

Answer 2

SELECT NVL(MAX(cid), 0) FROM itemconfiguration;

Answer 3

Can replace a number when max return null using ISNULL ,

ISNULL(MAX(cid),0) FROM itemconfiguration;