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ALTER TABLE `paper_library` ADD INDEX `idx_4` (`create_id` ASC) ,ADD INDEX `idx_5` (`create_date` ASC) ;
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ALTER TABLE `paper_library` ADD INDEX `idx_4` (`create_id` ASC) ,ADD INDEX `idx_5` (`create_date` ASC) ;
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ALTER TABLE `paper_library` ADD INDEX `idx_6`(`school_id`,`create_id`,`create_date`,`student_id`) ;
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ALTER TABLE `paper_library` ADD INDEX `idx_6`(`school_id`,`create_id`,`create_date`,`student_id`) ;
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