what is coalesce function in sql works all databases code example
Example: coalesce sql
Return the first non-null value in a list:
SELECT COALESCE(NULL, NULL, NULL, 'W3Schools.com', NULL, 'Example.com');
-- output: W3Schools.com
Return the first non-null value in a list:
SELECT COALESCE(NULL, NULL, NULL, 'W3Schools.com', NULL, 'Example.com');
-- output: W3Schools.com