SQL Having is a clause used in SQL queries to filter the results of a GROUP BY clause. It is used to specify a condition that must be met by the groups in the result set. The HAVING clause is similar to the WHERE clause, but it is used with aggregate functions and GROUP BY clauses.
The HAVING clause is used to filter the results of a GROUP BY clause based on a condition. It is used to specify a condition that must be met by the groups in the result set. The HAVING clause is similar to the WHERE clause, but it is used with aggregate functions and GROUP BY clauses.
The HAVING clause is used to filter the results of a GROUP BY clause based on a condition. It is used to specify a condition that must be met by the groups in the result set. The HAVING clause is similar to the WHERE clause, but it is used with aggregate functions and GROUP BY clauses.
Let's take a look at some examples of SQL Having:
SELECT department, AVG(salary) as avg_salary
FROM employees
GROUP BY department
HAVING AVG(salary) > 50000;
This query will return the average salary for each department, but only for departments where the average salary is greater than 50,000.
SELECT department, COUNT(*) as num_employees
FROM employees
GROUP BY department
HAVING COUNT(*) > 10;
This query will return the number of employees in each department, but only for departments where there are more than 10 employees.
The HAVING clause is a powerful tool in SQL that allows you to filter the results of a GROUP BY clause based on a condition. It is used to specify a condition that must be met by the groups in the result set. The HAVING clause is similar to the WHERE clause, but it is used with aggregate functions and GROUP BY clauses.