如下查詢是沒問題，但要創(chuàng)建成視圖就報View's SELECT contains a subquery in the FROM clause錯誤。

CREATE or REPLACE VIEW `v_user_adunion_reg` AS

select a.name as user_name,b.* from t_users a,t_adunion_result b where a.id = b.userid and orderid is null and czid is null and txid is null and bkid IS null and hbid is null

and b.id in (select id from (select c.userid,min(c.id) as id from t_adunion_result c group by c.userid ) as d);

執(zhí)行這句會報錯。

解決辦法：通過創(chuàng)建中間視圖作關(guān)聯(lián)查詢解決。

CREATE or REPLACE VIEW `v_user_adunion_regsub` AS

select c.userid,min(c.id) as id from t_adunion_result c group by c.userid;

CREATE or REPLACE VIEW `v_user_adunion_reg` AS

select a.name as user_name,b.* from t_users a,t_adunion_result b,v_user_adunion_regsub c where a.id = b.userid and b.id =c.id and orderid is null and czid is null and txid is null and bkid IS null and hbid is null ;

總結(jié)

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