如何“排序”超过列？

Question

这是我的查询：

SELECT count(oi.id) imgCnt, o.*, 
IF(pricet=2,c.currency_value*o.attributes_36*o.price, 
c.currency_value*o.price) AS pprice, od.title, oi.image, 
MIN(oi.id), (c.currency_value * o.price) AS fprice, 
ag.agent_name, DATE_FORMAT(o.date_added, '%d-%m-%Y') as dadded 
FROM i_offers_12 o 
LEFT JOIN i_agents ag ON o.agents_id = ag.id 
LEFT JOIN i_currencies c ON o.currencies_id = c.id 
LEFT JOIN i_offers_details od ON (o.id = od.offers_id AND od.languages_id = 1) 
LEFT JOIN i_offers_images oi ON (oi.offers_id = o.id AND oi.o_id = '12') 
WHERE (o.offer_status='active' OR o.offer_status='sold') 
AND actions_id = '1' 
AND c.id = o.currencies_id 
AND o.counties_id = '2' 
AND o.cities_id = '3' 
GROUP BY o.id 
ORDER BY dadded 
DESC 

我想以后排序dadded（这是日期类型）和offer_status（这是枚举类型）。 我想首先显示offer_status ='active'并按dadded排序的所有元素，之后所有具有offer_status ='出售'的元素并按dadded排序。我怎样才能做到这一点？ THX

Answer 1

要排序上必须是select语句的一部分的字段：

SELECT count(oi.id) imgCnt, o.*, 
    IF(pricet=2,c.currency_value*o.attributes_36*o.price, 
    c.currency_value*o.price) AS pprice, od.title, oi.image, 
    MIN(oi.id), (c.currency_value * o.price) AS fprice, 
    ag.agent_name, DATE_FORMAT(o.date_added, '%d-%m-%Y') as dadded , 
    offer_status 
    FROM i_offers_12 o 
    LEFT JOIN i_agents ag ON o.agents_id = ag.id 
    LEFT JOIN i_currencies c ON o.currencies_id = c.id 
    LEFT JOIN i_offers_details od ON (o.id = od.offers_id AND od.languages_id = 1) 
    LEFT JOIN i_offers_images oi ON (oi.offers_id = o.id AND oi.o_id = '12') 
    WHERE (o.offer_status='active' OR o.offer_status='sold') 
    AND actions_id = '1' 
    AND c.id = o.currencies_id 
    AND o.counties_id = '2' 
    AND o.cities_id = '3' 
    AND o.offer_status='active' 
    GROUP BY o.id 
    ORDER BY offer_status, dadded 
    DESC 

请注意，您通常应按所有未汇总字段进行分组（o。*， IF（pricet = 2，c.currency_value * o.attributes_36 * o.price， c.currency_value * o.price）AS pprice，od.title，oi.image，（c.currency_value * o.price）AS fprice， ag.agent_name，DATE_FORMAT（o.date_added， '％D-％间％Y'）作为dadded， offer_status）

MySQL是没有强制执行，但其他数据库，如Oracle一样。

Answer 2

我相信你可以写与

ORDER BY offer_status, dadded 

Answer 3

的SQL您可以用逗号，像

ORDER BY supplier_city DESC, supplier_state ASC;