單項(xiàng)選擇題

假設(shè)實(shí)體映射時(shí)有一個(gè)()的關(guān)聯(lián)指向另外一個(gè)實(shí)體,在查詢(xún)時(shí)必須也返回那個(gè)實(shí)體,否則會(huì)導(dǎo)致發(fā)生一個(gè)”column not found”的數(shù)據(jù)庫(kù)錯(cuò)誤

A.many-to-one
B.many-to-many
C.one-to-many
D.one-to-one

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