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@@ -42,9 +42,9 @@ class Version20151221150100 extends AbstractMigrationChamilo
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$this->addSql("
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UPDATE c_quiz_answer a
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INNER JOIN c_quiz_answer b
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- ON a.question_id = b.question_id
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+ ON (a.question_id = b.question_id AND b.c_id = a.c_id)
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INNER JOIN c_quiz_question q
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- ON b.question_id = q.id
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+ ON (b.question_id = q.id AND b.c_id = q.c_id)
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SET a.correct = b.id_auto
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WHERE
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a.correct = b.id AND
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