數據，而不加入

Question

表「科目」載列：

sub_date, sub_content, student_id 
2014-10-03, english, 1 
2014-10-09, maths, 2 
2014-10-11, biology, 1 

和 表遊戲包含列：

game_date, game_content, student_id 
2014-10-05, Hockey, 1 
2014-10-18, Tennis, 1 
2014-10-20, Cricket, 2 

我想按日期顯示student_id數據1級的所有細節（同時考慮sub_date和GAME_DATE

Date, Topic 
2014-10-03, english 
2014-10-05, Hockey 
2014-10-11, biology 
2014-10-18, Tennis 

請幫助

Answer 1

你可以試試這個：

select sub_date,sub_content from subjects where student_id = 1 
UNION 
select game_date,topic from games where student_id = 1 

Answer 2

你可以用這個嘗試（即使聲音還不如一個好主意）：

SELECT tmp.sub_date AS Date,tmp.sub_content AS Topic 
FROM (
    SELECT sub_date,sub_content,student_id FROM subjects 
    UNION SELECT game_date,game_content,student_id FROM games 
) tmp 
WHERE tmp.student_id = 1 ORDER BY tmp.sub_date;