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PRIMARY KEY (`columnNr`, `orderNr`, `fileName`,`exampleName`,`subCategoryName`, `categoryName`, `courseID`) ,
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FOREIGN KEY (`fileName` )
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FOREIGN KEY (`exampleName`,`subCategoryName` ,`categoryName` , `courseID` )
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REFERENCES `lenasys`.`Examples` (`exampleName`,`subCategoryName` ,`categoryName` , `courseID` ))
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REFERENCES `lenasys`.`Examples` (`exampleName`,`subCategoryName` ,`categoryName` , `courseID` )ON UPDATE CASCADE)
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