mysql三表查詢的方法（附圖）

//創建tb_borrow與tb_reader間的視圖 create view tb_viewborreader as select br.readerid,rd.name from tb_borrow as br left join tb_reader as rd on br.readerid=rd.id //創建tb_borrow,tb_bookcase與tb_bookinfo間的視圖

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