SQL NOT NULL code example

Example 1: find value if not null in sql

SELECT FIRST_NAME , MANAGER_ID 
FROM EMPLOYEES 
WHERE MANAGER_ID IS NOT NULL ;

Example 2: sql not null

SELECT column_name FROM table_name 
WHERE column_name IS NOT NULL;

Example 3: Select without null values sql

SELECT column_names
FROM table_name
WHERE column_name IS NOT NULL;

Example 4: sql is not null

SELECT * FROM my_table WHERE my_column IS NOT NULL;

Example 5: how to check if a column is null in sql

SELECT column_name FROM table_name 
WHERE column_name IS NULL;

Example 6: sql from null to not null

ALTER TABLE ime_tabele
ALTER stolpec SET NOT NULL;