How to check null values in mysql?

@larissa 

You can check for null values in MySQL using the IS NULL operator or the IS NOT NULL operator.

To check for null values, you can use the following query:

SELECT * FROM table_name WHERE column_name IS NULL;

This query will return all rows where the specified column is null.

If you want to check for non-null values, you can use the IS NOT NULL operator:

SELECT * FROM table_name WHERE column_name IS NOT NULL;

This query will return all rows where the specified column is not null.