SQL Tips – Records Without Children

SELECT t1.* FROM tabela1 t1
LEFT OUTER JOIN tabela2 t2
ON t1.Id = t2.CounterPeriod
WHERE t2.CounterPeriod IS NULL

— WHERE tabela1 contains the primary key and tabela2 contains the foreign key

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