sql多表連接library練習(xí)題(含部分答案).doc

多表連接習(xí)題：1 求在2005年2月3日借書的人的姓名及其所借書的書名。Select , from borrow join reader on reader.reader_id=borrow.reader_id join book on reader.reader_id=book.book_id where borrowdate=2005-2-32求讀者施秋樂所借的圖書編號(hào)、書名和出版社信息及借書時(shí)間。3查詢借閱了數(shù)據(jù)庫原理這本書的讀者編號(hào)和姓名。4查詢所有的借閱信息，要求列出借閱人編號(hào)、姓名、所借圖書編號(hào)、書名和借閱日期，并用中文顯示列名。5. 練習(xí)：查詢借書價(jià)格在20-40之間的讀者的姓名Select from book join borrow on book.book_id=borrow.book_id join reader on reader.reader_id =borrow.reader_idWhere price between 20 and 406. 練習(xí)：查詢胡曉麗借閱計(jì)算機(jī)文化基礎(chǔ)的日期Select borrowdate from book join borrow on book.book_id=borrow.book_id join reader on reader.reader_id=borrow.reader_id where R= 胡曉麗 and = 計(jì)算機(jī)文化基礎(chǔ)-Select borrowdate from borrow where reader_id in(select reader_id from reader where name= 胡曉麗 ) and book_id in (select book_id from book where name= 計(jì)算機(jī)文化基礎(chǔ))7. 練習(xí)：查詢所借圖書的平均價(jià)格多余30元的讀者的姓名Select from book join borrow on book.book_id=borrow.book_id join reader on reader.reader_id=borrow.reader_id Group by reader.reader_idHaving avg(price)30Select name from reader where reader_id in(select reader_id from borrow join book on book.book_id=borrow.book_id Group by reader_id having avg(price)30)多表連接作業(yè)：（能用多種方法的題目請(qǐng)用多種方法實(shí)現(xiàn)）1. 查詢成績大于90分的學(xué)生的學(xué)號(hào)、姓名和選修的課程號(hào)。select , from Book join borrow on book.book_id=borrow.book_idjoin reader on reader.reader_id=borrow.reader_id where borrowdate=2005-2-32 查詢選修了“數(shù)據(jù)庫基礎(chǔ)”課程的學(xué)生的學(xué)號(hào)、姓名和所在系。select , from Book join borrow on book.book_id=borrow.book_idjoin reader on reader.reader_id=borrow.reader_id where borrowdate=2005-2-34 查詢選修了課程“C01”的學(xué)生姓名和成績。select , from Book join borrow on book.book_id=borrow.book_idjoin reader on reader.reader_id=borrow.reader_id where borrowdate=2005-2-35. 查詢每個(gè)學(xué)生的學(xué)號(hào)、姓名、選修的課程及成績。select , from Book join borrow on book.book_id=borrow.book_idjoin reader on reader.reader_id=borrow.reader_id where borrowdate=2005-2-36 查詢選修2號(hào)課程且成績?cè)?0分以上的所有學(xué)生的學(xué)號(hào)、姓名和所在系。select , from Book join borrow on book.book_id=borrow.book_idjoin reader on reader.reader_id=borrow.reader_id where borrowdate=2005-2-37 查詢計(jì)算機(jī)系學(xué)生的選課情況，要求列出學(xué)生的名字、所修課程的課程號(hào)和成績。select , from Book join borrow on book.book_id=borrow.book_idjoin reader on reader.reader_id=borrow.reader_id where borrowdate=2005-2-38 查詢所有選修了VB課程的學(xué)生的情況，要求列出學(xué)生姓名和所在的系。select , from Book join borrow on book.book_id=borrow.book_idjoin reader on reader.reader_id=borrow.reader_id where borrowdate=2005-2-39 查詢信息系選修VB課程的學(xué)生的成績，要求列出學(xué)生姓名、課程號(hào)和成績。select ,reade