在MySQL JOIN查询中获取重复项

Question

我需要在查询中将两个表连接在一起并使查询正确执行，除非它列出数据的重复项？我只需要返回每条记录的一份副本。

SELECT DISTINCT FirstName, LastName, r.Email, ListingID 
FROM TableE e
JOIN TableR r ON e.ListingAgentID=r.AgentID 
WHERE ListingFirmID = 'JNA' 
ORDER BY ListPrice DESC

返回：

FirstName  |  LastName  |  Email      |  ListingID
-------------------------------------------------
Buck       |  Rogers    | buck@b.com  |  563214
Buck       |  Rogers    | buck@b.com  |  563214
Samm       |  Bogers    | samm@b.com  |  999999
Samm       |  Bogers    | samm@b.com  |  999999
Alan       |  Stoger    | Alan@b.com  |  232323
Alan       |  Stoger    | Alan@b.com  |  232323
Dann       |  Dammit    | dann@b.com  |  636363
Dann       |  Dammit    | dann@b.com  |  636363
Dann       |  Dammit    | dann@b.com  |  636363
Dann       |  Dammit    | dann@b.com  |  636363

Answer 1

SELECT DISTINCT <rest of your query goes here>