Replace NULL values

You can show the null values which represent the concept of missing or inapplicable information, with other values for better data representation.

Suppose we have a table as below:

So if you query from the database the null result will show the blank result.

You can replace NULL values by another value at run time.

SELECT name, 
       IF(country IS NULL,"No Country",country) country
FROM users;

MySQL also handles the null values directly using IFNULL function.

SELECT name, 
       IFNULL(country,"No Country") country
FROM users;

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