Cybercrux

Everything is achievable through technology

Having vs Where

HAVING is used to check conditions after the aggregation takes place.

WHERE is used before the aggregation takes place.

This code:

select City, CNT=Count(1)
From Address
Where State = ‘MA’
Group By City

Gives you a count of all the cities in MA.

This code:

select City, CNT=Count(1)
From Address
Where State = ‘MA’
Group By City
Having Count(1)>5

Gives you the count of all the cities in MA that occur 6 or more times.

Advertisements

Leave a Reply

Fill in your details below or click an icon to log in:

WordPress.com Logo

You are commenting using your WordPress.com account. Log Out / Change )

Twitter picture

You are commenting using your Twitter account. Log Out / Change )

Facebook photo

You are commenting using your Facebook account. Log Out / Change )

Google+ photo

You are commenting using your Google+ account. Log Out / Change )

Connecting to %s