美国数据库教材，Aneleventheditionisamilestonethatfewtextbooksachieve.Wewrotethefirsteditionofthisbookbecausewewantedtoexplainthecomplexityofdatabasesystemsinalanguagethatwaseasyforstudentstounderstand.Overtheyears,wehavemaintainedthisemphasisonreachingouttostudentstoexplaincomplexconcept