MySQL IFNULL: Examples

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SELECT IFNULL(1,0);

SELECT IFNULL('',1);

SELECT IFNULL(NULL,'IFNULL function');

SELECT 
    contactName, bizphone, homephone
FROM
    contacts;

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

SELECT * FROM customers;

SELECT * FROM employees;

SELECT * FROM offices;

SELECT * FROM orderdetails;

SELECT * FROM orders;

SELECT * FROM payments;

SELECT * FROM productlines;

SELECT * FROM products;

Execute

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