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SELECT t2.id,t2.name,t3.xuanke,t3.zongfenFROM student t2, (SELECT t1.`student_id`, COUNT(t1.`course_id`) xuanke, SUM(t1.`score`) zongfen FROM studentcourse t1, student t2… https://ddsog.com
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SELECT t2.id,t2.name,t3.xuanke,t3.zongfenFROM student t2, (SELECT t1.`student_id`, COUNT(t1.`course_id`) xuanke, SUM(t1.`score`) zongfen FROM studentcourse t1, student t2… https://ddsog.com
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