5.27Semi-joins
Suppose we want Accounts that have Contacts meeting a condition.
Conceptually:
SELECT Id, Name
FROM Account
WHERE Id IN (
SELECT AccountId
FROM Contact
WHERE Email LIKE '%@acme.com'
)
That's a semi-join style query.
Salesforce documentation also uses semi-join patterns to filter objects based on related records.
Useful for:
Accounts with Contacts
Accounts with Opportunities
Accounts with Cases
matching criteria.