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One to many relationship INNER JOIN condition
Message
 
 
À
14/02/2011 09:12:09
Information générale
Forum:
Microsoft SQL Server
Catégorie:
Syntaxe SQL
Versions des environnements
SQL Server:
SQL Server 2008
Application:
Web
Divers
Thread ID:
01500073
Message ID:
01500079
Vues:
54
>I have a situation that I have been trying to resolve but was unable to up until now. I have a one to many relationships in a SQL where I need to use a condition on the INNER JOIN table. So, for example, the INNER JOIN table might have three records related to one record from the master table in the SQL. But, I need to assure to take only master records where all the INNER JOIN records for that table would satisfy a condition. What could be an example of such a query?

Try
SELECT *
  FROM master m
  WHERE EXISTS ( SELECT 1 FROM slave s 
             WHERE s.fk = m.pk HAVING COUNT(*) = SUM( CASE WHEN <condition> THEN 1 ELSE 0 END ))
--sb--
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