查表

男娘i 2022-05-11 11:48 138阅读 0赞

1.  查询"红楼梦"目前可借的各图书编号，及所属版本信息。（是否借出为'否'的图书）

select D.ISBN,
    D.BNAME as 书名
    from BOOK B, BOOKDETAIL D
    WHERE 
      D.isbn = B.Isbn
      AND B.B_ISBORROW = '否'
      AND D.BNAME = '红楼梦'

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2、查找高等教育出版社的所有书目及单价，结果按单价降序排序。

select BD.ISBN,
    BD.BNAME AS 书名,
    bd.bprice as 价格
    from BOOKDETAIL BD
    WHERE BD.BPUBLISH ='人民出版社'
    ORDER BY BD.BPRICE DESC

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3、统计"红楼梦"各版的藏书数量（ISBN不同则版本不同）。

select B.ISBN,
    COUNT(B.BID) AS 数量
    from BOOKDETAIL BD, BOOK B
    WHERE BD.BNAME = '红楼梦'
    AND BD.ISBN = B.ISBN
    GROUP BY B.ISBN

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4、查询学号"20061234"号借书证借阅未还的图书的信息。

select BD.*
    from BOOKDETAIL BD, BOOK B, LEND L
    WHERE BD.ISBN = B.ISBN
    AND B.B_ISBORROW = '是'
    AND L.BID = B.BID
    AND L.RID = '20061234'

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5、查询各个出版社的图书最高单价、平均单价。

select 
    BD.BPUBLISH,
    MAX(BD.BPRICE) AS 最高价,
    AVG(BD.BPRICE) AS 平均价
    from BOOKDETAIL BD
    GROUP BY BD.BPUBLISH

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6、要查询借阅了两本和两本以上图书的读者的个人信息。

SELECT R.*
    FROM READER R,
    (select L.RID AS RID
    from LEND L
    GROUP BY L.RID
    HAVING COUNT(*) >= 2) TEMP
    WHERE R.RID = TEMP.RID

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7、查询"王菲"的单位、所借图书的书名和借阅日期。

SELECT R.RDEPT AS 单位,
    BD.BNAME AS 书名,
    L.STARTDATE AS 借阅日期
    FROM READER R, BOOK B, BOOKDETAIL BD, LEND L
    WHERE B.ISBN = BD.ISBN
    AND    L.BID = B.BID
    AND    R.RID = L.RID
    AND    R.RNAME = '王菲'

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8、查询每类图书的册数和平均单价。

SELECT 
    BD.CID,
    COUNT(*),
    AVG(BD.BPRICE)
    FROM BOOKDETAIL BD, CAT C
    WHERE BD.CID = C.CID 
    GROUP BY BD.CID

![70 7][]  
9、统计从未借书的读者人数。

SELECT COUNT(*)
    FROM READER R
    WHERE R.RID NOT IN (
      SELECT L.RID
      FROM LEND L
    )

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10、统计参与借书的人数。

SELECT COUNT(*)
    FROM READER R
    WHERE R.RID IN (
      SELECT L.RID
      FROM LEND L
    )

![70 9][]  
11、找出所有借书未还的读者的信息及所借图书编号及名称。

select BD.ISBN,
    BD.BNAME,
    R.*
    from BOOKDETAIL BD, BOOK B, LEND L, READER R
    WHERE L.RID = R.RID
    AND B.B_ISBORROW = '是'
    AND L.ENDDATE IS NULL
    AND BD.ISBN = B.ISBN
    AND L.BID = B.BID

![70 10][]  
12、检索书名是以"Internet"开头的所有图书的书名和作者。

我用数据开头好让能查一个数据出来

select BD.BNAME AS 书名,
    BD.BAUTHER AS 作者
    from BOOKDETAIL BD
    WHERE REGEXP_LIKE(BD.BNAME, '数据')

![70 11][]  
13、查询各图书的罚款总数。

select BD.BNAME, F.FMONEY
    from FINE F
    LEFT JOIN LEND L 
    ON L.FID = F.FID,
    BOOK B,
    BOOKDETAIL BD
    WHERE F.FID = L.FID AND L.BID = B.BID AND BD.ISBN = B.ISBN

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14、查询借阅及罚款分类信息，如果有罚款则显示借阅信息及罚款名称、罚金，如果没有罚款则罚款名称、罚金显示空（左外连接）

select L.*, F.FNAME, F.FMONEY
    from LEND L
    LEFT OUTER JOIN FINE F
    ON L.FID = F.FID

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15、查询借阅了所有"文学"类书目的读者的姓名、单位。

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