load from $DATADIR/item.final.csv of DEL insert into ruizhang.item
load from $DATADIR/author.final.csv of DEL insert into ruizhang.author
load from $DATADIR/item_author.final.csv of DEL insert into ruizhang.item_author
load from $DATADIR/publisher.final.csv of DEL insert into ruizhang.publisher
load from $DATADIR/related_item.final.csv of DEL insert into ruizhang.related_item
load from $DATADIR/item_publisher.final.csv of DEL insert into ruizhang.item_publisher

