# SQL HAVING Clause

### The SQL HAVING Clause

The HAVING clause was added to SQL because the WHERE keyword could not be used with aggregate functions.

#### HAVING Syntax

```sql
SELECT column_name(s)
FROM table_name
WHERE condition
GROUP BY column_name(s)
HAVING condition
ORDER BY column_name(s);
```

### Demo Database

Below is a selection from the "Customers" table in the Northwind sample database:<br>

![](https://826093633-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LS8lPNzCGPR5-DLbGXv%2F-LSc5BSZPUVebjbZRSN5%2F-LSc5cLqeovDTFZZc63U%2Fimage.png?alt=media\&token=ef24f62c-3e90-4494-bc75-86f43a446190)

\
SQL HAVING Examples

The following SQL statement lists the number of customers in each country. Only include countries with more than 5 customers:

```sql
SELECT COUNT(CustomerID), Country
FROM Customers
GROUP BY Country
HAVING COUNT(CustomerID) > 5;
```

The following SQL statement lists the number of customers in each country, sorted high to low (Only include countries with more than 5 customer ):

```sql
SELECT COUNT(CustomerID), Country
FROM Customers
GROUP BY Country
HAVING COUNT(CustomerID) > 5
ORDER BY COUNT(CustomerID) DESC;
```

**Demo Database**

Below is a selection from the "Orders" table in the Northwind sample database:\ <br>

![](https://826093633-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LS8lPNzCGPR5-DLbGXv%2F-LSc5BSZPUVebjbZRSN5%2F-LSc6E0KvI9VxraKZzYY%2Fimage.png?alt=media\&token=e04539e6-b65b-4ea8-b210-2b8856b05461)

\
And a selection from the "Employees" table:<br>

![](https://826093633-files.gitbook.io/~/files/v0/b/gitbook-legacy-files/o/assets%2F-LS8lPNzCGPR5-DLbGXv%2F-LSc5BSZPUVebjbZRSN5%2F-LSc6N2yNnunk9PkobZu%2Fimage.png?alt=media\&token=3a97cb58-a7a8-466a-bf77-c36d08951a37)

\
More HAVING Examples

The following SQL statement lists the employees that have registered more than 10 orders:

```sql
SELECT Employees.LastName, COUNT(Orders.OrderID)
 AS NumberOfOrders
FROM (Orders
INNER JOIN Employees ON Orders.EmployeeID 
 Employees.EmployeeID)
GROUP BY LastName
HAVING COUNT(Orders.OrderID) > 10;
```

The following SQL statement lists if the employees "Davolio" or "Fuller" have registered more than 25 orders:

```sql
SELECT Employees.LastName, COUNT(Orders.OrderID)
 AS NumberOfOrders
FROM Orders
INNER JOIN Employees ON Orders.EmployeeID 
 Employees.EmployeeID
WHERE LastName = 'Davolio' OR LastName = 'Fuller'
GROUP BY LastName
HAVING COUNT(Orders.OrderID) > 25;
```

\
NOTE: Whenever we want to apply filter condition in Aggregate functions, we use HAVING Clause. For Scalar Functions, we use WHERE Clause.

<br>


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