sql IN clause code example

Example 1: sql in

Used alongside a WHERE clause as a shorthand for multiple OR conditions.
So instead of:
SELECT * FROM users
WHERE country = 'USA' OR country = 'United Kingdom' OR
country = 'Russia' OR country = 'Australia';
You can use:
SELECT * FROM users
WHERE country IN ('USA', 'United Kingdom', 'Russia',
'Australia');

Example 2: sql not in

SQL NOT IN operator is used to filter the result if the values that are mentioned as part of the IN operator is not satisfied. Let’s discuss in detail about SQL NOT IN operator.

Syntax:
SELECT Column(s) FROM table_name WHERE Column NOT IN (value1, value2... valueN);

Example 3: in query in sql

SELECT Id, FirstName, LastName, Country  FROM Customer WHERE Country IN        (SELECT Country           FROM Supplier)

Example 4: in operator in sql

(IN) operator in sql like "OR" operator
For example: 
Select * From employees
Where department_id "IN" (60,90);

Example 5: where query in sql server

SELECT * FROM Customers
WHERE Country='Mexico';