I have written the below parent to child inner query which works :
List<master__c> masterObj = new List<master__c>([Select id, (Select ID FROM detail__r) FROM Master__c]);
Which works fine. Similarly I am writing the child to parent inner query :
List<master__c> masterObj = new List<master__c>([select id, (select id from master__c) from detail__c]); system.debug(masterObj);
it is giving error ** Line: 1, Column: 49 Didn't understand relationship 'master__c' in FROM part of query call. If you are attempting to use a custom relationship, be sure to append the '__r' after the custom relationship name. Please reference your WSDL or the describe call for the appropriate names.
Could you please help in identifying what is wrong with the query.