mysql check if null code example

Example 1: mysql check if not null

SELECT * 
FROM table 
WHERE YourColumn IS NOT NULL;

Example 2: mysql where value is null

SELECT *
FROM contacts
WHERE last_name IS NULL;

Example 3: how to check a db specific rows col is empty

SELECT * FROM table WHERE some_col IS NULL OR some_col = '';

Example 4: mysql select default if null

IFNULL(MAX(EMAIL), "[email protected]") as email

Example 5: check if value is null mysql

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