Question

我正在使用以下查询成功连接两个表。我想添加标准，仅显示至少有2条记录的代理，其中SearchPrice＆gt; = 250000 ...我尝试添加“HAVING COUNT（）＆gt; = 2”但是当我添加此项时，我只会获得一个结果？我认为它可能会对ActiveAgent表应用“HAVING COUNT（）＆gt; = 2”吗？

    SELECT 
    r.EmailAddress AS ag_email, 
    e.ListingAgentFullName AS ag_name, 
    r.OfficeName AS ag_office_name 
    FROM RESI 
    e JOIN ActiveAgent r 
    ON e.ListingAgentNumber=r.MemberNumber
    WHERE SearchPrice >= 250000;

Answer 1

试试这个

SELECT 
    r.EmailAddress AS ag_email, 
    COUNT(r.EmailAddress) AS `acount`,
    e.ListingAgentFullName AS ag_name, 
    r.OfficeName AS ag_office_name 
    FROM RESI 
    e LEFT JOIN ActiveAgent r 
    ON e.ListingAgentNumber=r.MemberNumber
    WHERE SearchPrice >= 250000;
    GROUP BY r.EmailAddress
    HAVING acount >=2

MySQL连接在初始表中多次出现

1 个答案: