how to select not null values in sql code example

Example 1: sql not null

SELECT column_name FROM table_name 
WHERE column_name IS NOT NULL;

Example 2: Select without null values sql

SELECT column_names
FROM table_name
WHERE column_name IS NOT NULL;

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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