They gave their first accept vote to you, and now they have an accepted answer
Q&A for Drupal developers and administrators
CREATE TABLE #HasAccepted ( UserId INT NOT NULL, PRIMARY KEY(UserId), FOREIGN KEY(UserId) REFERENCES Users(Id) ); CREATE TABLE #Result ( Inviter INT NOT NULL, Invited INT NOT NULL/*, PRIMARY KEY(Inviter, Invited), FOREIGN KEY(Inviter) REFERENCES Users(Id), FOREIGN KEY(Invited) REFERENCES Users(Id)*/ ); INSERT INTO #HasAccepted SELECT Posts.OwnerUserId FROM Posts, Votes WHERE Votes.VoteTypeId = 1 AND Votes.PostId = Posts.Id AND Posts.OwnerUserId > 0 GROUP BY Posts.OwnerUserId; WITH Raw AS ( SELECT Q.OwnerUserId AS QUserId, A.OwnerUserId AS AUserId, Votes.Id AS VoteId FROM Votes, Posts Q, Posts A, #HasAccepted WHERE Votes.VoteTypeId = 1 AND Votes.PostId = A.Id AND Q.Id = A.ParentId AND Q.OwnerUserId > A.OwnerUserId AND Q.OwnerUserId = #HasAccepted.UserId ), Raw2 AS ( SELECT QUserId, MIN(VoteId) AS MinVoteId FROM Raw GROUP BY QUserId ), Result AS ( SELECT Raw.AUserId AS Inviter, Raw.QUserId AS Invited FROM Raw, Raw2 WHERE Raw.QUserId = Raw2.QUserId AND Raw.VoteId = Raw2.MinVoteId ) /* SELECT Inviter, COUNT(*) AS Count FROM Result GROUP BY Inviter ORDER BY Count DESC, Inviter; */ SELECT * FROM Result WHERE Inviter = ##AccountId:int##