討論串[問題] 請問一個SQL
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我有下列 2 table. Name Sex Age. =====================. John M 21. Mark M 20. Mary F 25. Jean F 23. Name Course Grade. ====================. John Math A. J
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假設上面這個叫做 Student. 下設下面這個叫做 Class. 硬幹法. select s.*, m.grade as Math, a.grade as Art, e.grade as English. from student as s,. (select * from class where
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How about this?. select student.*,. (select grade from class. where course = 'Math' and student.name=class.name) as Math,. (select grade from class. w
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成績表. Person Course Score. =============================. P1 Chinese 95. P1 English 80. P1 Math 76. P1 History 45. P2 English 56. P2 Math 78. P2 Chines
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