how to check if any column is null in sql code example

Example 1: sql not null

SELECT column_name FROM table_name 
WHERE column_name IS NOT NULL;

Example 2: if column value is null then in mysql

SELECT 
    contactname, IFNULL(bizphone, homephone) phone
FROM
    contacts;

Example 3: how to check if a column is null in sql

SELECT column_name FROM table_name 
WHERE column_name IS NULL;

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Sql Example

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