get null in sql

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Antonella
20 Aug 2016
1SELECT column_name FROM table_name 
2WHERE column_name IS NOT NULL;
Jorge
31 Nov 2020
1SELECT column_name FROM table_name 
2WHERE column_name IS NULL;
Valentín
01 Jun 2019
1Tests for empty (NULL) values.
2Example: Returns users that haven’t given a contact number.
3SELECT * FROM users
4WHERE contact_number IS NULL;
Nick
25 Jun 2020
1SELECT * FROM EMPLOYEES 
2WHERE MANAGER_ID IS NULL ;
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