Mysql if null

Mysql where value is null

SELECT *
FROM contacts
WHERE last_name IS NULL;

Check if value is null mysql

SELECT * from TABLE where CODE IS NULL OR CODE!='C'

Source: stackoverflow.com

Mysql ifnull

##syntax:
SELECT IFNULL(col_with_null_value, default_value);

##you can see the result select with the string NA where the document is null:
SELECT IFNULL(user_document_id, 'NA');

Mysql if null

IFNULL(MAX(EMAIL), "example@google.com") as email

Mysql return 0 if null

SELECT IFNULL(field, 0) AS field FROM products WHERE id = 1

SELECT IFNULL(SUM(field), 0) as field FROM products

If null mysql

SELECT IFNULL(NULL, "W3Schools.com");

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