PostgreSQL Insert Record: Insert NULL values into a column of a table
4. Write a SQL statement to insert NULL values into region_id column for a row of countries table.
INSERT INTO countries (country_id,country_name,region_id) VALUES('C3','UK',NULL);
Here is the command to see the list of inserting rows :
postgres=# SELECT * FROM countries; country_id | country_name | region_id ------------+--------------+----------- C1 | India | 1002 C2 | USA | C3 | UK | (3 rows)
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