UNION ALL订购最终结果

Question

我有以下查询成功生成结果。但是，结果是顺序的，我想在两个名为clicks

的表中按列排序

(SELECT women_id, title, body FROM women ORDER BY women_id DESC LIMIT 5) 
UNION ALL 
(SELECT man_id, title, body FROM man ORDER BY man_id DESC LIMIT 5)

现在它给出了这样的结果：

women 41124
women 124
women 12
women 2
women 1
men 3455434
men 1233
men 135
men 23
men 1

我需要它来给出这样的最终结果：

men 3455434
women 41124
men 1233
men 135
women 124
men 23
women 12
women 2
women 1
men 1

Answer 1

您需要将clicks引入UNION - ed数据集，添加ORDER BY，然后将不必要的列与其他SELECT一起投影，就像这样：

SELECT person_id, title, body FROM ((
   (SELECT women_id as person_id, title, body, clicks FROM women ORDER BY women_id DESC LIMIT 5)
UNION ALL
   (SELECT man_id as person_id, title, body, clicks FROM man ORDER BY man_id DESC LIMIT 5)
) ORDER BY clicks DESC) data

Answer 2

(
    (SELECT women_id, title, body, clicks FROM women ORDER BY women_id DESC LIMIT 5)
    UNION ALL
    (SELECT man_id, title, body, clicks FROM man ORDER BY man_id DESC LIMIT 5)
)
ORDER BY clicks DESC

只需在最后添加订单并完成工作

Answer 3

SELECT * FROM 
(
    (SELECT women_id AS ID, title, body FROM women LIMIT 5) 
    UNION ALL 
    (SELECT man_id  AS ID, title, body FROM man LIMIT 5)
)
ORDER BY ID DESC