Sql

SELECT * FROM EMPLOYEES 
WHERE MANAGER_ID IS NULL ;

Tests for empty (NULL) values.
Example: Returns users that haven’t given a contact number.
SELECT * FROM users
WHERE contact_number IS NULL;

SELECT *
FROM Employee
WHERE email IS NOT NULL;

SELECT ProductName, UnitPrice * (UnitsInStock + UnitsOnOrder)
FROM Products;

PREVIOUS	NEXT

Code Example
Sql :: IS NOT NULL statement
Sql :: psql create user
Sql :: how to delete the rows with null values in mysql
Sql :: The local psql command could not be located
Sql :: postgresql contains
Sql :: sql select first and last record of each group
Sql :: mysql trim spaces
Sql :: how to uninstall postgresql 13 on mac
Sql :: mariadb json select
Sql :: SQL ORDER BY ASC (Ascending Order)
Sql :: version and edition of SQL Server Database Engine
Sql :: snowflake drop column
Sql :: sql select case when
Sql :: activate log mysql
Sql :: json with root element in sql server
Sql :: date in oracle
Sql :: android studio SQLiteDatabase delete all data in database
Sql :: como consultar registros duplicados en mysql
Sql :: oracle index size
Sql :: installing mysql on centos 7
Sql :: How do I insert a blob in SQL?
Sql :: sql cnvert bit to nvarchar
Sql :: all_dependencies
Sql :: sql view talbe columns
Sql :: sql joins
Sql :: mysql count table rows
Sql :: NVL() Functions
Sql :: sql select where clause
Sql :: postgres data location
Sql :: delete from IN subquery