using having in sql code example

Example 1: what is having clause in sql

HAVING clause in SQL is used to
filter records in combination
with the GROUP BY clause. It is
different from WHERE, since 
WHERE clause cannot filter 
aggregated records. HAVING is a column
operation.

Select department_id, Min (Salary)
From Employees
Group By Department_id
Having MIN (salary) < 3500;

Example 2: having keyword sql

Having keyword basically similar to if condition
Only returns true conditions

SELECT FIRST_NAME , COUNT(*)
FROM EMPLOYEES 
GROUP BY FIRST_NAME
HAVING COUNT(*) > 1