Use of SQL IN Operator

Use of SQL IN Operator. The following SQL commands show how to use IN operator of SQL while querying with array data. 

SQL IN Operator Syntax:

SELECT column, column, ....
FROM table_name
WHERE column_name IN (item, item1, item2, item2);

Example:

SELECT * FROM employees
WHERE country IN ('Germany', 'France', 'UK');

SQL IN Operator in for Sub Query:

SELECT column, column, ....
FROM table_name
WHERE column_name IN (SELECT column FROM tablename);

Example:

SELECT * FROM employees
WHERE Country IN (SELECT Country FROM customers);